Water Weight Calculator – How Much Does Water Weigh

Find how much water weighs given a volume in teaspoons, tablespoons, cups, quarts, pints, gallons, liters, or milliliters.

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How Much Does Water Weigh?

The weight of a volume of water can be found given the density, which is the mass compared to the volume. The density of water is 1 kilogram per liter (kg/L) at 39.2°. This means that 1 liter (L) of water weighs 1 kilogram (kg) and 1 milliliter (mL) of water weighs 1 gram (g).

The density of water will vary slightly at different temperatures which will impact the weight of a volume of water.

bottle of water with a chart indicating that 1 ml of water weighs 1 g

How to Calculate the Weight of Water

To find the weight of water, start by finding the density(1 kg/L at 39.2°) and the volume of water. Convert the volume of water to liters and then multiply by the density to find the weight. Use our fluid volume conversion calculators to convert different volumes to liters.

Example: For 10mL of water at a density of 1 kg/L

volume = 10mL
volume = 10mL ÷ 1000 = .01L
density = 1 kg/L
weight = .01kg
weight = .01kg × 1000 = 10g

1 gram is equal to 0.035274 ounces so to get a result in ounces simply multiply the grams by 0.035274. You can also use our weight conversion calculators to convert from grams and kilograms to pounds and ounces.

Weight of Water for Different Volumes

Weight of water by unit of measure
Volume Weight (oz) Weight (lb) Weight (g) Weight (kg)
1 teaspoon 0.0109 lb 0.1739 oz 4.929 g 0.004929 kg
1 tablespoon 0.0326 lb 0.5216 oz 14.787 g 0.0148 kg
1 cup 0.5216 lb 8.345 oz 236.59 g 0.2366 kg
1 pint 1.043 lb 16.691 oz 473.18 g 0.4732 kg
1 quart 2.086 lb 33.382 oz 946.35 g 0.9464 kg
1 gallon 8.345 lb 133.53 oz 3,785.4 g 3.785 kg
1 milliliter 0.002205 lb 0.0353 oz 1 g 0.001 kg
1 liter 2.205 lb 35.274 oz 1,000 g 1 kg
1 cubic inch 0.0361 lb 0.578 oz 16.387 g 0.0164 kg
1 cubic foot 62.428 lb 998.85 oz 28,317 g 28.317 kg
1 cubic yard 1,685.6 lb 26,969 oz 764,555 g 764.55 kg
1 cubic centimeter 0.002205 lb 0.0353 oz 1 g 0.001 kg
1 cubic meter 2,204.6 lb 35,274 oz 1,000,000 g 1,000 kg

Density of Water

Density of water at different temperatures
Temperature
( °F / °C )		 Density
( 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

Working on a plumbing project? Use our pipe volume calculator to calculate the volume and weight of the water in your plumbing system.

By Joe Sexton
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