How Much Does A Liter Of Water Weigh (In Lbs & Kg)


Water invades almost every aspect of our everyday lives. We used it for hydration, recreational purposes, food preparation, etc. Sometimes, it is important to know the weight of water, especially when you are cooking.

This article will guide you through the measurement of water in pounds and in kilograms, so you can easily answer the question—how much does a liter of water weigh?

Before we jump to direct conversion from one unit to another, let’s first understand what the different units of measurement are.

  1. What Is a Liter?
  2. What Is a Pound?
  3. What Is a Kilogram?
  4. How to Convert Liters to Pounds?
  5. How to Convert Liters to Kilogram?
  6. What Is the Weight of A Liter of Water?
  7. How Does the Weight of Water Vary?
  8. The Takeaway

What Is a Liter?


This is a quite commonly observed unit. You will find it on your measuring cups, your water bottles, your soda bottles, etc. This unit of volume belongs to the metric system.

It has its origins in France, for whom liter was a base unit. While, in current usage, it is not considered an SI unit, it finds an accepted place for use with SI prefixes. It is denoted by two SI symbols L and l. The United States shows a preference for the symbol L.

Interestingly, liter was not initially known as the liter. It was called ‘cadil’ in France. It was later revised and named liter.

Liters and milliliters (one-thousandth of one liter) are almost entirely used across beverage labels in Australia, New Zealand, and Canada.

What Is a Pound?


Does pound cake sound familiar? Did you ever wonder why the cake is called pound cake? It is entirely because of its recipe, which requires one pound of each ingredient. So, what exactly is a pound?

A pound is a measurement of mass. It can be found in the United States customary units of measurement along with the British imperial units.

The SI symbol for the pound is lb, and it exacts to 0.45359237 kilograms.

The origin of this abbreviation can be traced back to the ancient Roman unit of mass known as the libra. Historically, the unit of the pound can be found scattered across various units of measurement. However, the use is now obsolete.

If you trace back to history, you will discover that the pound got its initial defining value in London in the 1300s. This value went through several changes over the years before it settled on a more accurate value.

However, the arrival of the metric system has demoted the use of the pound.

What Is a Kilogram?


A kilogram is a base unit in the metric system. This SI unit is a unit of mass. It is denoted by the symbol kg.

The unit of a kilogram is wildly popular in various fields across the globe. You will often find a colloquial reference to it as just a ‘kilo’.

The first definition of a kilogram can be traced back to 1793, while the most recent definition (with regard to the Planck constant) was adopted in 2018.

The coinage of the word itself can be traced to the French kilogramme. This spelling is still accepted for usage in the UK.

How to Convert Liters to Pounds?

A liter measures volume whereas a pound measures weight. Therefore, when converting one unit to the other, the conversion rates can vary depending upon the density.

This conversion rate is applicable to pure water at 39.2 °F.

1 liter (L) = 2.2046 pounds (lbs)

1 pound (lbs) = 0.4535970244035199 liters (l)

Therefore, pounds = liters x 2.2046

For instance, how much is three liters of water in pounds?

3 x 2.2046 = 6.61386 lb

How to Convert Liters to Kilogram?

Similar to the pound conversion rate, liter and kilogram are two varying units of measurement. However, it is known that one kilogram of pure water at 39.2 °F is equal to one liter.

This conversion rate varies according to density. In order to convert liters to kilograms of a liquid with varying densities, you will have to use this formula.

Kilogram = liter x density

What Is the Weight of A Liter of Water?

You may be required to calculate how much a liter of water weighs if you are working on a recipe that requires precise measurements.

However, without going deeper into the quarry, I will let you in on how much a liter of water weighs.

1 liter (L) of water = 1 kilogram (kg)

1 liter (L) of water = 2.2 pounds (lb)

How Does the Weight of Water Vary?


How much water weighs depends upon several factors such as density of water, temperature, pressure, and even the presence of substances like salt.

Density lets you know how compact or how dispersed a substance is. The density of water undergoes changes with temperature and pressure. Water at 39.2 °F is much denser than water at 212°F.

An easy way to under this is with ice. Ice has a much lower density. Therefore, it floats on water. Take another instance. If you were handed a cup of water versus a cup filled with ice, which cup weighs more?

Therefore, density changes with temperature. Ordinarily, an increase in temperature results in less density and vice-versa. However, this does not happen with water. When water’s temperature drops, it becomes less dense. It becomes lighter than water at a higher temperature.

Similarly, the addition of salt to water increases its density. This means salt water is heavier than pure water.

Based on this, a liter of water can vary in kilograms and in pounds. If it is salt water, it is heavier than the above-mentioned weight in kilograms and pounds.

The Takeaway

Water is a broad part of our lives. There are certain instances when needing to know how much a liter of water weighs can make all the difference.

This article sums up how much a liter of water can weigh in kilograms and pounds. However, there is one important thing to note. The weight of a liter of water can vary, so the conversion rate is not stable. This variation depends upon density, temperature, pressure, and foreign substances.

However, if you take into account pure water, then one liter of water is equal to one kilogram and 2.2 pounds of water.

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