How to convert weight from kilograms to liters. How much does a liter of water weigh? How much does 1 liter weigh

The weight of one liter of water weighed at an atmospheric pressure of 760 mm and a temperature of the highest density of water of 4 ° C is approximately 998.5 grams.

The weight of one liter of water is approximately 998.5 grams.

Water is the most unusual liquid on our planet. Indeed, thanks to water, not only life on Earth appeared, but also many important inventions that played a huge role in the development of the technical progress of mankind. It's all about the amazing properties of water, which can easily go from a liquid state to a solid or gaseous state. In everyday life, it often becomes necessary to determine the mass of this liquid - whether it is a chemical experiment in a school chemistry lesson, a production process, or simply household needs. How much does 1 liter of water weigh? The answer to this question is not as simple as it might seem at first glance.

What determines the mass of water?

According to the laws of physics, there is a difference between weight and mass. If we talk about weight, then we mean the force of the impact of a body of a certain mass on the surface. And the term "mass" denotes a quantitative measure of the inertia of the body, which is measured in kilograms. In our article we are talking about the mass of water.

How much does a liter of water weigh? This indicator depends on:

• temperature
• atmospheric pressure
• water conditions (liquid, ice, snow)
• salinity of water (fresh, salty)
• types of hydrogen isotopes

So the weight of water depends on all the above factors, which together determine the value of this indicator.

How much does a liter of water weigh - a bit of history

At different times, the answer to this question was not the same. But the annual consumption of water in the world is extremely large! Therefore, it was necessary to make a general decision regarding the measurement of the mass of the liquid. So, in 1964, during the international conference on weights and measures, a unit was approved, denoting the volume of 1 dm 3 of water - a liter.

However, this unit means, rather, not weight, but volume. In this case, the weight can be completely different - for example, a liter of water will be much heavier than a liter of gasoline due to its greater density.

In 1901, the Third International Conference on Weights and Measures decided to designate a liter as the volume of 1 kg of water at a temperature of 3.98 ° C and an atmospheric pressure of 760 mm Hg. The main difference between the designation of a liter was that in 1901 this unit was considered the volume of a kilogram, and in 1964 - only the volume, while the weight of the substance could be different.

So in the period 1901 - 1964. the weight of a liter of water was equal to one kilogram, however, subject to the above indicators of temperature and atmospheric pressure. To maintain this equality, it is also necessary that the water be clean. After all, ordinary drinking water contains salts that have a different effect on its density. Is there a difference between swimming in a fresh lake and salt water? Of course, the latter is unlikely to drown. So in order for a liter of water to be equal to a kilogram, the liquid must be distilled, obtained by evaporation and condensation of steam.

How to determine how much one liter of water weighs?

To conduct such an experiment, we need a glass or plastic jar, measuring utensils, electronic scales and distilled water. First you need to determine the mass of the can with the help of scales and write down the resulting figure. Pour a liter of water into a measuring dish, pour into a jar and weigh again. Now you need to subtract the mass of the can - the result will be about one kilogram. Such scales can be used to determine the mass of other liquids - for example, milk.

If you want to get a more accurate indicator, you must comply with the conditions of temperature (4˚С) and pressure (760 mm Hg). Then the mass of water will be 998.5 g.

Tap water, when weighed, will show slightly different results than distilled water. The fact is that impurities of heavy metals may be present in tap water, which increases the mass of one liter of water. Special formulas are also used to calculate the mass of 1 liter of water.

Now we know how much 1 liter of water weighs, what factors affect the weight of a liter of water and how to calculate the mass of water experimentally.

Water is perhaps one of the most unusual liquids. Under normal conditions, we can easily observe how it goes into any of the three states - liquid, solid, gaseous. Thanks to water, we had many inventions in the past that played a big role in technological progress. Thanks to water, for example, steam engines appeared. If it were not for the easily accessible steam, who knows which path the technique would take? Water mills, one might say, are the prototype of hydroelectric power plants. Many examples…

The world consumes a huge amount of water every minute. In this regard, some unit of measurement of the amount of liquid was required. In 1964, at the 12th General Conference on Weights and Measures, such a unit was adopted. It was called a liter, and it meant the volume of one cubic decimeter of water. There are two subtle points here.

First, a liter is not a weight, but a volume.. Secondly, since this is the volume, then its weight can be different. Indeed, a liter of gasoline is much lighter than a liter of water because its density is much lower.

Here the question arises - how much does a liter of water weigh? The answer is ambiguous. For example, since 1901, at the 3rd General Conference on Weights and Measures, the liter was defined differently. It denoted the volume of one kilogram of water at a temperature of 3.98 degrees and normal atmospheric pressure of 760 mmHg. Note - in 1901, a liter meant the volume of a kilogram, and in 1964 - just a volume, regardless of weight. In this case, the volume of a liter was 1.000028 cubic decimeters.

We can conclude that from 1901 to 1964, a liter of water weighed exactly one kilogram. But this is only under the specified conditions. Why did they need to be taken into account? But because they directly affect the density of water. At a temperature of 3.98 degrees, water has the highest density. At zero, ice is lighter than water, and at higher temperatures, the density decreases (the weight is less). So is atmospheric pressure - the higher it is, the greater the density of water, respectively, and the weight is also greater.

Another prerequisite for a kilogram of water to give exactly a liter was the purity of the water. As you know, many salts are dissolved in ordinary drinking water, which affect the density of water in different ways. Have you swum in fresh and salt lakes? And there and there water, and the difference - that is? You can easily drown in fresh water, but if you try hard in salty water. Therefore, distilled water obtained by evaporation and condensation of steam can be taken into account. It contains no foreign impurities. Rain water has approximately the same properties.

If at least one condition is not met, then a liter of water can no longer weigh exactly one kilogram. The greater the deviation, the greater the difference. It is useful to give examples here.

For example, at a temperature of 0 degrees, the density of water is 0.99987 g/ml. This means that a liter of "correct" water will weigh 999.87 grams. At a temperature of 25 degrees - 997.1 grams, at 35 degrees - 994.06 grams, and at a temperature of 90 degrees - 965.34 grams. The difference is quite noticeable.

With increasing pressure, the weight of a liter of water also changes. For example, water is lighter on top of a mountain than somewhere in a mine or at the bottom of the ocean.

And finally, a couple of little-known, but curious facts. If you take water, devoid of gases dissolved in it, then it can be cooled to -70 degrees, and it will not freeze. But as soon as you shake it up or add a piece of ice, it will instantly freeze, and the temperature will rise to 0 degrees!

The same water does not boil if it is heated to 150 degrees. But as soon as you shake it up or add an air bubble, it will instantly boil, and its temperature will be exactly 100 degrees!

Such an amazing ordinary liquid runs from an ordinary water tap ...

When converting kilograms to liters, be sure to clarify what is at stake. Each substance has its own density, and only by specifying the name of the object, we can talk about its mass.

Where did the names come from

If you plunge deep into history, you need to understand that for each individual city, not to mention countries, there were their own concepts of weight, length, time. The measure of weight in every corner of the planet had its own, it was measured in ounces, pounds, measures, pounds and other units, and even the same names did not guarantee the weight match. It was the same with length, ranging from small measurements to distances between cities. But until the end of the eighteenth century, no one would have understood the question “how many kilograms in 1 liter?”, Because such names did not even exist.

Over time, when states came to unity of command, and international trade began to develop actively, a need arose for universal standardization. And if within each individual country the unification of measurements occurred almost simultaneously with the formation of this very country, then the world community approached uniform international standards in the second half of the nineteenth century.

The names "meter" and "kilogram" themselves appeared in France in 1795. After the victory of the French Revolution, the new authorities decided to get rid of everything that looked like a monarchy. The changed names of the months of the year, days of the week did not last long, but the roots of the new units of measurement of the entire world community originate precisely in France. It was there that they first answered the question “how many kilograms are in 1 liter of water?”.

Metric system

The word "liter" got its name from the old French "litron", which denoted the measure of bulk solids. And the old French term has its roots in ancient Greece and ancient Rome. After the French Revolution, the liter became the new unit of measurement for volume. And in the same 1795, they determined how much a kilogram weighs 1 liter of water. To begin with, we determined how much one reference gram was. He weighed like one cube of melt water with an edge of one hundredth of a meter. And since a gram was a rather small quantity, not convenient for making a standard, a unit one thousand times heavier than a gram was taken as a standard. And, accordingly, the volume was "adjusted" under it. Therefore, to the question “how many kilograms are in 1 liter of water?” The only answer is "One". But the system, which was based on the meter and kilogram, received international recognition only in the last quarter of the nineteenth century, when seventeen states, including Russia, at a meeting in Paris confirmed the Meter Convention with their signatures.

SI system

The Convention served as the basis for the creation of the International Bureau of Weights and Measures, the purpose of which was precisely the organization of a unified system of measurements. This system became the foundation for the emergence in 1960 of the International System of Units (SI). In this system, there was no place for a liter, but bringing measurements to a single standard allows you to answer the question at any time, how many kilograms are in 1 liter of any substance.

Liter measurements

Water was originally taken as the standard of mass in the state of melting ice. After that, the definitions changed, and water at the temperature of the highest density and the normal state of the atmospheric phenomenon became the sample of one kilogram. It follows from this that a substance, in this case water, even in a 1 liter container can have a different weight. Therefore, when asked how many kilograms are in 1 liter, one should also specify atmospheric pressure and water temperature. And again, when it is not about water, the weight of one liter will vary significantly. Thus, the heaviest liquid in its natural state - mercury - is more than thirteen times heavier than water. And, for example, vegetable oil is lighter than water, and if you pour oil into water, an oil film forms on the surface. Given that one liter corresponds to one cubic decimeter, liters can be used to measure not only liquid substances, but also solid ones. The hardest known substance - osmium - is 23 times heavier than water, and the ice that forms when water freezes has a lower density, and therefore is located on the surface of the water. How many kilograms in 1 liter depends on what we measure.

measuring utensils

And where solids are measured in liters, free-flowing ones also appear. And in the old days, it was bulk substances that determined the volume of dishes, wheat served as a standard for this. And in the modern world, measuring utensils come to the aid of all housewives. With its help, you can safely answer the question of how many kilograms are in 1 liter, and by no means water. After all, everything is clear with water. Depending on the need, measuring utensils can measure how much cream, milk, perhaps even flour or cereals are in one liter. Or maybe not in one liter, but only in a glass. Measured utensils will show how many kilograms, pounds or ounces are in 1 liter, depending on which country's recipe will be being prepared at the moment. If you don’t have measuring utensils at hand, reference books will help, which, to the nearest gram, will tell you about the capacity of one liter in relation to all kinds of products.

Sometimes, in order to solve some practical problem, housewives have to look for an answer to the question: how many kilograms of this or that product are in a liter?

There is, of course, no single answer to this question. It all depends on the density of this very product.

How to determine the mass of a liquid if its volume is known

The exact mass of the liquid is calculated by the formula:

m = p * v, where:

• m is the mass (in kg);
• p - density (in kg / m 3);
• v - volume (in m 3).

Recall that 1 l \u003d 0.0001 m 3.

However, it is, of course, inconvenient to calculate the mass each time using the formula. Therefore, we present ready-made values ​​of what is the mass of 1 liter of some products.

How many kilograms of water in a liter

The easiest will be with water. The fact is that in 1901, the weight of 1 kg of water was determined by a liter. Although here, too, there are nuances. Firstly, the weight of 1 liter of water is equal to 1 kg only at an atmospheric pressure of 760 mm Hg. Art. and a temperature of 3.98ºС. Under other conditions, the density of water changes and, accordingly, its mass changes. Secondly, it turned out that the mass of the kilogram standard is slightly greater than the mass of 1 liter of water. And since 1964, 1 liter to 1 kg of water, strictly speaking, is no longer attached. But in everyday life, of course, we do not need to go into such details. You can simply remember that 1 liter of water weighs about 1 kg.

How many kilograms of other liquids are in a liter

In one liter:

• milk - 1.029 g;
• kefir - from 1.027 to 1.039 kg (depending on the percentage of fat content);
• juice without pulp - about 1 kg;
• juice with pulp - about 1,050 kg;
• wine - 0.975-0.990 kg;
• alcohol - 0.789 kg,
• sunflower oil - 0.920-0.930 kg.

Water is perhaps one of the most unusual liquids. Under normal conditions, we can easily observe how it goes into any of the three states - liquid, solid, gaseous. Thanks to water, we had many inventions in the past that played a big role in technological progress. Thanks to water, for example, steam engines appeared. If it were not for the easily accessible steam, who knows which path the technique would take? Water mills, one might say, are the prototype of hydroelectric power plants. Many examples…

The world consumes a huge amount of water every minute. In this regard, some unit of measurement of the amount of liquid was required. In 1964, at the 12th General Conference on Weights and Measures, such a unit was adopted. It was called a liter, and it meant the volume of one cubic decimeter of water. There are two subtle points here.

First, a liter is not a weight, but a volume. Secondly, since this is the volume, then its weight can be different. Indeed, a liter of gasoline is much lighter than a liter of water because its density is much lower.

Here the question arises - how much does a liter of water weigh? The answer is ambiguous. For example, since 1901, at the 3rd General Conference on Weights and Measures, the liter was defined differently. It denoted the volume of one kilogram of water at a temperature of 3.98 degrees and normal atmospheric pressure of 760 mmHg. Note that in 1901 a liter meant the volume of a kilogram, and in 1964 it simply meant volume, regardless of weight. In this case, the volume of a liter was 1.000028 cubic decimeters.

We can conclude that from 1901 to 1964, a liter of water weighed exactly one kilogram. But this is only under the specified conditions. Why did they need to be taken into account? But because they directly affect the density of water. At a temperature of 3.98 degrees, water has the highest density. At zero, ice is lighter than water, and at higher temperatures, the density decreases (the weight is less). So is atmospheric pressure - the higher it is, the greater the density of water, respectively, and the weight is also greater.

Another prerequisite for a kilogram of water to give exactly a liter was the purity of the water. As you know, many salts are dissolved in ordinary drinking water, which affect the density of water in different ways. Have you swum in fresh and salt lakes? And there and there water, and the difference - that is? You can easily drown in fresh water, but if you try hard in salty water. Therefore, distilled water obtained by evaporation and condensation of steam can be taken into account. It contains no foreign impurities. Rain water has approximately the same properties.

If at least one condition is not met, then a liter of water can no longer weigh exactly one kilogram. The greater the deviation, the greater the difference. It is useful to give examples here.

For example, at a temperature of 0 degrees, the density of water is 0.99987 g/ml. This means that a liter of "correct" water will weigh 999.87 grams. At a temperature of 25 degrees - 997.1 grams, at 35 degrees - 994.06 grams, and at a temperature of 90 degrees - 965.34 grams. The difference is quite noticeable.

With increasing pressure, the weight of a liter of water also changes. For example, water is lighter on top of a mountain than somewhere in a mine or at the bottom of the ocean.

And finally, a couple of little-known, but curious facts. If you take water, devoid of gases dissolved in it, then it can be cooled to -70 degrees, and it will not freeze. But as soon as you shake it up or add a piece of ice, it will instantly freeze, and the temperature will rise to 0 degrees!

The same water does not boil if it is heated to 150 degrees. But as soon as you shake it up or add an air bubble, it will instantly boil, and its temperature will be exactly 100 degrees!

Such an amazing ordinary liquid runs from an ordinary water tap ...

Litre may seem rather stupid to an ignorant person. "Of course one!" he will answer. And he'll be wrong. We are used to thinking that if the measure of weight of solid (or bulk) substances is measured in kilograms, then liquids are measured in liters. But it's not. A liter is for liquids. It is only equal to a cubic meter. This is such a measure of the coverage of solids - firewood, for example. That is, this is such a conditional cube, each face of which is equal to 10 cm. Of course, it never occurs to anyone to compare a kilogram with a meter!

However (by volume it is directly related to weight. Therefore, the question: “How many kilograms are in a liter?” Is not so idle. You just need to take into account one more measurement parameter, namely the density of the substance inserted into this volume. The higher this indicator, the greater the weight Let's remember the experience that we were shown in the second grade at the lesson of natural history. Two empty identical cans were placed on the scales. A candle was lit under one of them. The fire heated which, at the same time, went down. The can with cold air became heavier.

It is possible to link volume and weight in this way: if you drink more than the daily norm per liter of water every day, then after some time you can lose two kilograms of weight. This conclusion was made by scientists at the Virginia Institute of Technology, based on the research. But how to calculate how many kilograms are in a liter? In simple terms, it is equal to density times volume. What does this give us in everyday life? We do not know, for example, the density of sour cream or honey. In addition, this indicator is very unstable, because it even depends on weather conditions!

Yes, the density of a substance can vary with temperature, humidity and atmospheric pressure. As a result, this will affect how many kilograms are in a liter. Remember another experiment from school science: hot bodies increase in volume. Oh, by the way, and a corked bottle full of water can burst if you put it in the cold. In the kitchen, it is good to have a special measure. It looks like an ordinary jug. However, on the walls of this vessel there are marks indicating the level of a kilogram of granulated sugar, vegetable oil, flour and milk.

Going to the market and asking the price of gardeners' products, which are usually sold in jars, we often wonder how many kilograms of berries are in a liter. After all, here, in addition to the density of the "Kalinka-Malinka" itself, other factors also play a role. For example, the number of gaps between the berries. That is, the larger the fruit, the more air in the jar will be sold to you. Thus, a liter contains 600 g of raspberries or blackberries, 800 g of cherries, cherries and blueberries, 850 g of gooseberries, 550 g of cranberries and only 400 g of strawberries.

Well, how many kilograms are in a liter of water? In 1901, the Third General Conference on Standards of Measure determined that a liter of water equals a kilogram only if:

• distilled liquid;
• her temperature is 3.98 degrees Celsius;
• atmospheric pressure is 760 mmHg.

If at least one of these parameters is violated and does not coincide with the others, the mass of a liter of water is less than a kilogram: at zero temperature it weighs 999 g, at 35 degrees Celsius - 994 g, at 90 degrees - 965 g.

Conversion table for the volumetric weight of various

Quite often in practice, we are faced with situations where we need to find out what is the weight of 1 liter of paint. Usually, such information is used to convert mass to other volumes, for those containers whose volume is known in advance: cans (0.5, 1, 2, 3 l), bottles (250 mm, 0.5 ml, 0.75, 1, 1.5, 2, 5 l), glasses (200 ml, 250 ml), canisters (5, 10, 15, 20, 25 l), flasks (0.25, 0.5, 0.75, 0.8, 1l) buckets (3, 5, 7, 8, 10, 12, 15, 18, 20, 25, 30 l), flasks and cans (3, 5, 10, 22, 25, 30, 40, 45, 50, 51, 200 l), barrels (30, 50, 60, 65, 75, 127, 160, 200, 205, 227, 900 l), tanks, cylinders, tanks (0.8 m3, 25.2, 26, 28.9, 30.24, 32.68, 32.7, 38.5, 38.7, 40, 44.54, 44.8 .46 , 46.11, 46.86, 50, 54, 54.4, 54.07, 55.2, 61, 61.17, 62.39, 63.7, 65.2, 73, 73.1, 73.17, 75.5, 62.36, 88.6 m3, 99.2, 101 .57, 140, 159, 161.5 m3). In principle, even pots and pans can be estimated by weight if you know how much one liter of paint weighs.
For domestic use and some independent work, the question may be asked differently when they ask not the weight of 1 liter of paint, but how much a liter jar (jar) weighs. Usually interested in how many grams or kilograms in a liter jar. Finding such data: how much it weighs, on the Internet is not as easy as it seems. The fact is that the generally accepted format for supplying material in any reference books, tables, TU and GOST, is reduced to bringing only the density and specific gravity of the paint. In this case, the indicated units of measurement are one m3, cubic meter, cubic meter or cubic meter. Less than 1 cm3. And we are interested in how much a liter volume weighs. Which leads to the need for additional conversion of cubic meters (m3) into liters. This is inconvenient, although it is possible to do the correct conversion of cubes into the number of liters on your own. Using the ratio: 1 m3 = 1000 liters.
For the convenience of site visitors, we independently made recalculations and indicated how much one liter of paint weighs in table 1. Knowing the weight of 1 liter of paint, you not only determine the mass of a liter can, but you can easily calculate how much any other container weighs, for which you know displacement At the same time, it is necessary to understand the undesirability and impossibility of accurate estimates made on the basis of such recalculations for large containers with a significant volume of displacement. The fact is that with such calculation methods a large error arises, acceptable only in the sense of an approximate estimate of the mass. Therefore, professionals use special tables that indicate how much, for example, an automobile or railway tank, a barrel weighs. On the other hand, for applied and domestic purposes, for home conditions, the calculation method based on a liter volume is quite suitable and can be applied in practice. In cases where we need more accurate data, for example: in laboratory research, for examination, for debugging the production process, setting up equipment, and so on. The weight of 1 liter of paint is best determined experimentally, through weighing on accurate scales, using a special method, and not using reference, theoretical, tabular average data on density and its specific gravity.

Metric

English system of measures

ON A NOTE

Calculation of the volume of the aquarium

Counting and measuring drug doses

The doses of drugs given in chapter 27 are expressed in different ways according to the consistency of the drug (dry or liquid) and the method of administration. Doses of dry chemicals (powders and crystals) are expressed in units of weight, such as milligrams (mg) or grams (g). At the same time, doses of liquid drugs are usually expressed in volume units, such as milliliters (mL). Drug doses for bath treatment depend on the volume of water into which the drug is injected - for example, 10 mg per liter; 10 ml of a 10% solution per liter, etc. If drugs are administered in food, the dosage is based on the weight of the fish (or approximate weight) - for example, 10 mg of drug per kilogram of fish weight; 0.1 ml of solution per 100 g of fish weight, etc. Alternatively, the dosage may be based on the ratio between drug and food, for example, 1 mg of drug per 100 g of food.

The volume of an aquarium is usually expressed in liters. To calculate the volume, you need to do the following: multiply the length of the aquarium by its width and depth (all these values ​​\u200b\u200bmust be expressed in centimeters), and then divide the resulting value by 1000 - then you will get the volume of the aquarium, expressed in liters.

If you are calculating the volume of an aquarium that has decorations, remember to correct for the amount of water displaced by the soil and decorations. This amendment is difficult to assess. Therefore, when you fill the aquarium with water (decorative objects should already be there), use a vessel of known volume for this purpose. Write down how many times you had to fill this vessel with water to fill the aquarium. So you can calculate the actual volume of water in the aquarium. The resulting number must be written down and stored in some safe place - for example, in an aquarium first-aid kit. You can write this number in indelible ink on the outside of the side wall of the aquarium. Subsequently, if necessary, this inscription can be removed with medical alcohol or another similar substance.

1 English gallon* of water weighs 10 pounds

1 lb = 16 oz

1 lb = 0.454 kg

1 cubic foot of water = 6.23 gallons

1 English gallon = 4.55 liters*

1 pint = 0.568 liters

1 inch = 2.54cm

1 kg = 1000 g

1 kg = 2.205 pounds

1000cm3 (ml) = 1 liter

1 liter = 0.2198 gallons

1 liter = 1.756 pints

1cm=0.3937 inch

* 1 US gallon = approximately 0.8 imperial gallons or 3.79 liters

If the treatment is to be carried out with a short-term bath in a small volume of water (see above paragraph "Methods of drug administration"), then it will be easier to measure this volume than to calculate the volume of the entire container.

Some medicines are expensive, so it makes no sense to dissolve the medicine in 10 liters of water in order to treat a three-centimeter fish in the resulting solution for 5 minutes, and then pour the water along with the medicine.

Each liquid has its own weight, depending on volume and mass. How many kilograms per liter of water, milk, gasoline or other liquid is known to units, so we decided to prepare detailed material on this topic. Consider, for example, the most popular liquids that each of us regularly encounters in everyday life.

How much does water weigh?

In 1901, 1 liter of water was equated to exactly 1 kilogram, but later it turned out that this ratio is true only under certain conditions. Atmospheric pressure should be 760 mm Hg. Art., and the temperature of the water and the environment - 4 degrees Celsius. Under other conditions, the density of water changes slightly. In this regard, in 1964, the binding of 1 liter of water to 1 kilogram was no longer used in the exact sciences, but in everyday life you can easily rely on this ratio, since the deviations are insignificant.

How many kilograms in a liter of milk?

Contrary to popular belief, a liter of milk does not weigh 1 kilogram, but a little more. This is confirmed by the simplest physical formula m=P*V, where m is the mass, V is the volume and P is the density. When calculating the weight of milk according to the formula, it is necessary to take into account its density, on which the density depends. The latter varies from 1027 to 1032 kg/m3. If we take the density of 1029.5 as an example and substitute it into the formula, it turns out that 1 liter of milk weighs 1.03 kg. Again, we note that in normal living conditions this difference will hardly be noticeable, so you can safely equate a liter of milk to a kilogram.

Mass of fuel and lubricants

Now let's find out how many kilograms are in 1 liter of gasoline, diesel fuel and motor oil. As in the previous cases, the weight depends on the volume and density and is calculated using the same formula. In order not to torment you with calculations, here is a table with the main types of fuel and lubricants:

As you can see, the masses of different types of fuels and lubricants may differ slightly from each other, but you now know the approximate values ​​\u200b\u200bof how much a liter of diesel fuel, gasoline and other liquids weigh.

How much does paint weigh?

The mass of paints and varnishes largely depends on their brand and GOSTs, according to which they are made. Consider several of the most popular types of paints and varnishes, namely how many kg in one liter:

• water emulsion - in 1 liter about 1.34-1.36 kg;
• acrylic weighs - 1.45-1.55 kg;
• paint PF-115 - 0.9-0.92 kg;
• primer GF-021 - 1.49-1.52 kg.

Weight of other liquids

Also consider a small list of other common liquids. Let's take 1 liter of each of them and translate into kilograms:

• a liter of wine - 0.97-0.99 kg;
• kefir - 1.027-1.040 kg;
• juice with pulp - 1.05 kg;
• juice without pulp or nectar - 1 kg exactly;
• alcohol - 0.789 kg;
• sunflower oil - 0.92-0.93 kg;
• a liter of honey - from 1.402 to 1.443 kg;

Separately, we note how many grams are in 1 liter of gas:

• nitrogen - 1.251 g;
• air - 1.293 g;
• methane - 0.717 g;
• helium - 0.178 g;

Mass of solid and bulk materials

Many do not know, but some bulk materials are usually measured not in kilograms, but in liters. This applies to sand, coal, earth, so in the table below we will consider how much 1 liter of each of them weighs:

Converting liters to kilograms is not required so often, but now you will know how much a particular liquid or solid material weighs.

According to invoices - one hundred and ninety-four tons ... Wai, woe to me ...
- How much is missing?
The Oriental replied:
- Very little. Four tons is not enough.
Actually, ten.
At the most, sixteen tons are missing.
The brigadier shook his head.
- You're an artist, dad! Sixteen tons of glucose moved! When did you make it?
The guest explained:
- People come up at all stations. Our Soviet people. Give in, they say, dear Bala, some grapes. And I have a good heart. Take it, I say.
- Well, yes, - the brigadier nodded, - and you sell them sixteen tons of state property. And, as they say, by no means by bank transfer.
The Eastern man clutched his head again:
- I know that rysk! I know it's turma! Good heart - I can not refuse.

© S.Dovlatov "Grapes"

The kilogram has become lighter. Either someone bit off 50 micrograms from the standard - the weight of a fingerprint, or the rest of the colleagues-standards sharply gained weight. Meanwhile, the kilogram is the only SI unit that is defined using an object made by people.

So, the keepers of this very standard receive a lot of interesting offers like, "maybe we can cut it off, 10 grams, huh? Well, for a couple of thousand lyam oiro." Can you imagine what scale of world underweight can be arranged with the help of a standard?

And they will hang out the weight in the markets: Rate on September 14, 2007 1 kg = 950 grams. By the way, a liter, probably already, is also under threat ...

At the moment, the kilogram is the only SI unit that is defined using a human-made object - a platinum-iridium standard. All other units are now defined using fundamental physical properties and laws.

The standard was made in 1889 and has since been stored at the International Bureau of Weights and Measures under three sealed glass caps. It is an alloy of platinum and iridium 3.9 centimeters high and in diameter. Exact official copies of the international standard were also made, which are used as national standards of the kilogram. In total, more than 80 copies were created. Copies of the international standard are also stored in the Russian Federation, at the All-Russian Research Institute of Metrology. Mendeleev. Approximately once every 10 years, national standards are compared with international ones. These comparisons show that the accuracy of national standards is approximately 2 µg. Since they are stored under the same conditions, there is no reason to believe that the international standard is more accurate. For various reasons, in a hundred years the international standard loses 0.00000003 of its mass. However, by definition, the mass of an international standard is exactly equal to one kilogram. Therefore, any change in the actual mass of the standard leads to a change in the value of the kilogram.

To eliminate these inaccuracies, various options for redefining the kilogram based on fundamental physical laws are currently being considered. So, since 2003, an international group of researchers from 8 countries, including Germany, Australia, Italy and Japan, under the auspices of the German standards laboratory, has been working to redefine the kilogram as the mass of a certain number of silicon-28 isotope atoms. The second project, called "Electronic Kilogram", started in 2005 at the US National Institute of Standards and Technology (NIST). The head of this project, Richard Steiner, claims that he has been working on the creation of the "electronic kilogram" for more than ten years. Scientists led by Dr. Steiner have created a device that measures the power required to generate an electromagnetic field, with which one kilogram of mass can be lifted. With its help, scientists were able to determine the mass of one kilogram with an accuracy of 99.999995%.

In November 2007, an advisory group will meet in Paris to determine an alternative to the metal standard of the kilogram, as well as other measures: the kelvin, which serves as a unit for measuring temperature, and the mole, which expresses the amount of a substance. The benchmarks will be based on more accurate calculations and all states will have to accept these changes.

One of the contenders for the role of a new kilogram standard is a ball created from a crystal of the silicon-28 isotope - such a standard would include atoms of the same type and would have a fixed mass.

Based on materials and forums dirty, wiki, rian