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Water Weight Result

Calculate the weight of water in grams, kilograms, pounds, and ounces. Account for temperature changes to ensure maximum accuracy in your water weight calculations.

Disclaimer: Whilst every effort has been made in building our calculator tools, we are not to be held liable for any damages or monetary losses arising out of or in connection with their use. Full disclaimer.

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How much does water weigh?

The weight of a volume of water depends upon the temperature at which it is being stored. Water expands as it gets warmer: meaning that hot water weighs less, and cold water weighs more due to density changes.

At room temperature (70°F / 21°C), the density of water is approximately 0.99802 g/mL. This means a US gallon of water at room temperature weighs around 8.33 pounds.

How much does 1 liter of water weigh?

One liter of water at room temperature (70°F / 21°C) weighs approximately 1 kilogram (2.2 lb). The density is very close to 1g/mL.

How much does 500ml of water weigh?

500ml of water at room temperature weighs approximately 500 grams (1.1 lb).

Calculating the weight of water

1
Convert volume to mL: Multiply your liters by 1000.
2
Multiply by density: Multiply the volume (mL) by the specific density at your temperature.
3
Convert to desired units: Divide by 1000 for kg or multiply by 0.0022 for lbs.

Water density chart

Density of water at different temperatures
Water temp (°F / °C)Density (g/mL)
32°F / 0°C0.99987
39.2°F / 4.0°C1.00000
70°F / 21.1°C0.99802
100°F / 37.8°C0.99318
212°F / 100°C0.95865
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Calculator created by Alastair Hazell