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Water Weight Calculator

Water Weight Calculator

Select the water weight unit and enter the volume. The calculator will instantly estimate the water weight in grams, ounces, kilograms, and pounds to complete the construction project.

Convert from:


Water temperature:


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Calculate how much water weighs given a certain volume with the assistance of this free online water weight calculator.

How Much Does Water Weigh?

You can determine the weight of the water by taking into account its density. The density of water at room temperature is about 1 kilogram per litre (kg/L) at 39.2°C or 0.99802 g/ml at 21°C. If you know the density and volume of the water, then you can calculate the mass of the water with the help of the following formula:

Density = Mass/Volume
Mass = Density * Volume

Effect of Temperature and Density on Water Weight:

The weight of the wt water varies directly with the changing temperature. At high temperature, water weighs less because it becomes less dense. This is because the quantity of the oxygen in the water decreases due to chemical reactions taking place at higher temperatures. Due to this lack of oxygen gas, the weight is reduced enough.

On the other hand, at low temperature, the quantity of dissolved oxygen increases enough. Due to this excess of oxygen, the density of the water will become higher enough which makes it weigh more.

For this reason, the weight of the water changes every time as the temperature is not always static. This is why it is very difficult to measure the mass every single minute. But do not worry at all as our best water weight calculator will instantly determine the weight. All you need to do is to fetch the temperature and you will get to know how much specific quantity of the water weighs that you are having.

Below here we have arranged a table that contains the density of water at different temperatures:


( °F / °C )


( grams per cm3 )

32° / 0° 0.99987 g/cm3
39.2°/4.0° 1.00000 g/cm3
40°/4.4° 0.99999 g/cm3
50°/10° 0.99975 g/cm3
60°/15.6° 0.99907 g/cm3
70°/21° 0.99802 g/cm3
80°/26.7° 0.99669 g/cm3
90°/32.2° 0.99510 g/cm3
100°/37.8° 0.99318 g/cm3
120°/48.9° 0.98870 g/cm3
140°/60° 0.98338 g/cm3
160°/71.1° 0.97729 g/cm3
180°/82.2° 0.97056 g/cm3
200°/93.3° 0.96333 g/cm3
212°/100° 0.95865 g/cm3

You can also go for instant verification of all above mentioned values by commencing to our free water weight calculator.

The table below demonstrates that how temperature affects the mass of the water contained in different gallon sizes:


( °F / °C )

Weight of One Gallon of Water Weight of Five Gallons of Water
32° / 0° 8.34432 lbs 41.721598 lbs
39.2°/4.0° 8.345404 lbs 41.72702 lbs
40°/4.4° 8.345321 lbs 41.726605 lbs
50°/10° 8.343318 lbs 41.71659 lbs
60°/15.6° 8.337643 lbs 41.688215 lbs
70°/21° 8.328881 lbs 41.64405 lbs
80°/26.7° 8.317781 lbs 41.588905 lbs
90°/32.2° 8.304512 lbs 41.52256 lbs
100°/37.8° 8.288489 lbs 41.442445 lbs

How Much Does A Gallon of Water Weigh?

According to the US metric system, a normal standard sized gallon of water contains about 8.34 pounds of water. No doubt that increasing the number of gallons will also increase the mass of the water. Let us have a look of specific number of gallons that contain certain mass of water that could be determined by the assistance of our best water weight calculator and are as follows:

Number of Gallons  Water weight in pounds
6 50.04
2.5 20.85
8 66.72
125 1042.5
3 25.02
1000 8340
90 750.6
12 100.08
600 5004
3 25.02
37 308.58
120 1000.8
5 41.7
1 8.34
10 83.4
20 166.8
50 417
300 2502
250 2085
500 4170
70 583.8
32 266.88
210 1751.4
3000 25020
1500 12510
200 1668
110 917.4


If you have more gallons or a gallon that contains more than 8.34 pounds of water, you can instantly measure how much your gallon contains water by using this mass of water calculator.

Water Weight Per Liter:

One liter of water approximately weighs about 2.21 pounds. Moreover, the table be is arranged to let you know how heavy a certain volume of water is. Let’s have a look!

Quantity in liters Water weight in ponds
2 4.42
5 11.05
1.5 3.315
10 22.1
15 33.15
6 13.26
20 44.2


Key Points For Calculating Water Weight:

If you are interested in determining the mass o the water, you need to keep following steps to do so:

  • Convert the given volume of water in liters
  • Then convert the density of the water as kg/L
  • After that, put the values in the following formula:

Mass = Density * Volume

The free online water weight calculator also makes use of this formula to convert the water volume to weight.

How To Calculate Water Weight?

Let us go for calculating the mass of water in the following examples:

Example # 01:
How much does a liter of water weigh at a temperature of 10 degree celsius?


Here we have:

Density of water at 10°C is 0.99975 g/cm3. So we have:

Mass = Density * Volume
Mass = 0.99975 * 1
Mass = 0.99975 kg

Example # 02:

How much does 275 gallons of water weigh?


As we know that one single gallon of water weighs about 2.21 pounds, so we have:

275 gallons = 275 * 2.21
275 gallons = 607.75kg

Here our free calculator also displays weight conversions in different other units as well.

How Water Weight Calculator Works?

Let this free weight of water calculator calculate the mass of the weight enclosed within a certain volume. Let us find how!


  • From the first drop down list, select the quantity within which you want to calculate weight of the water
  • Now enter the values of the volume and temperature in their designated fields
  • Now tap the calculate button


The free mass of water calculator determines:

  • Weight of water within the volume
  • Conversion of weight in grams, ounces, pounds, and kilograms

Moreover you can also determine the molar mass of the water as well by using our free online  molar mass calculator.


How heavy does one cup of water weigh?

One cup of water contains about 236 grams or 0.520 282 186 95 Pounds that you could also check with the assistance of our best water weight calculator.

Does ice and water weigh same?

No, not at all! If you take the same volume of water and ice in a different but same container, water will weigh more. The reason is that the density of the ice is less than the water. When density is low, it will also weigh less. That is why ice floats on the surface of water.

Is water heavier than snow?

Basically, snow is water. So the more the snow, the more the amount of water is. This snow weighs about 7 pounds per cubic feet. If snow is more wet, then the amount of water is about 20 pounds per cubic feet.


So far we discussed the water mass calculations that are very necessary if you are transporting distilled water, beverages, or any other forms of liquid that contain water. And this is where our best water weight calculator comes to help you to determine how much liquid is being transported. Beverage industries broadly use this calculator to keep a proper balance in quantity of water by mass in the beverages.


From the source of wikipedia: Water, Properties, On Earth, Effects on life