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

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Teaspoons Tablespoons cup Pints Quarts Gallons Milliliters Liters Cubic customs Cubic Feet Cubic Yards Cubic Centimeters Cubic meter
32 °F (0 °C) 39.2 °F (4 °C) 40 °F (4.4 °C) 50 °F (10 °C) 60 °F (15.6 °C) 70 °F (21 °C) 80 °F (26.7 °C) 90 °F (32.2 °C) 100 °F (37.8 °C) 120 °F (48.9 °C) 140 °F (60 °C) 160 °F (71.1 °C) 180 °F (82.2 °C) 200 °F (93.3 °C) 212 °F (100 °C)
The load of a volume that water can be discovered given the density, i m sorry is the mass compared to the volume. The density of water is 1 kilogram every liter (kg/L) at 39.2°.

This method that 1 liter (L) the water weighs 1 kilogram (kg) and also 1 milliliter (mL) that water weighs 1 gram (g).

In usual US measures, one gallon that water weighs 8.345 pounds.


The thickness of water varies slightly at different temperatures which will influence the weight of because that the exact same volume.

How to calculate the weight of Water

To uncover the load of water, begin by recognize the density(1 kg/L at 39.2°) and the volume of water. Convert the volume of water to liters and also then main point by the thickness to find the weight. Use our volume counter calculators to convert different volumes to liters.

Example: because that 10 mL of water in ~ a thickness of 1 kg/L

volume = 10 mLvolume = 10 mL ÷ 1000 = .01 Ldensity = 1 kg/Lweight = .01 kgweight = .01 kg × 1000 = 10 g
1 gram is equal to 0.035274 ounces so to acquire a an outcome in ounces simply multiply the grams through 0.035274. Girlfriend can additionally use our load conversion calculators to transform from grams and also kilograms come pounds and also ounces.

Weight of Water for different Volumes

Weight of water by unit of measureVolumeWeight (oz)Weight (lb)Weight (g)Weight (kg)
1 teaspoon0.1739 oz0.0109 lb4.929 g0.004929 kg
1 tablespoon0.5216 oz0.0326 lb14.787 g0.0148 kg
1 cup8.345 oz0.5216 lb236.59 g0.2366 kg
1 pint16.691 oz1.043 lb473.18 g0.4732 kg
1 quart33.382 oz2.086 lb946.35 g0.9464 kg
1 gallon133.53 oz8.345 lb3,785.4 g3.785 kg
1 milliliter0.0353 oz0.002205 lb1 g0.001 kg
1 liter35.274 oz2.205 lb1,000 g1 kg
1 cubic inch0.578 oz0.0361 lb16.387 g0.0164 kg
1 cubic foot998.85 oz62.428 lb28,317 g28.317 kg
1 cubic yard26,969 oz1,685.6 lb764,555 g764.55 kg
1 cubic centimeter0.0353 oz0.002205 lb1 g0.001 kg
1 cubic meter35,274 oz2,204.6 lb1,000,000 g1,000 kg

The Temperature influence the weight of Water

As we discussed briefly above, temperature has an impact on the density of water, and also thus its an accurate weight will vary with the temperature. As the temperature of water rises, it expands, bring about it to increase in volume slightly.<1>

At a molecule level, together the temperature rises, the warmth of the water molecules increases, which rises their energy. As the energy in the molecule rises, the particles within move and also vibrate more, bring about them to take it up an ext space.

Thus, the warmer the water is, the an ext volume it will consume, and the lower its thickness will be. The chart below shows the thickness of water at assorted temperatures, according to the us Department the the Interior.<2>

Density of Water at assorted Temperatures

Density the water at various temperaturesTemperature( °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

How lot Does a Gallon that Water Weigh?

We mentioned above that one gallon the water weighs 8.345 pounds at 39.2 °F as soon as the density of water is precisely equal to 1.0 g/cm³. But, due to the fact that the thickness of water fluctuates through the temperature, the weight of a gallon of water changes too.

So, just exactly how much does a gallon that water sweet then? One gallon of water weighs in between 8.288489 and also 8.345404 pounds, relying on the temperature. The table below shows the weight at miscellaneous temperatures.

Weight that one united state gallon of water at various temperaturesTemperature( °F / °C )Weight that One Gallon of WaterWeight of 5 Gallons the Water
32° / 0°8.34432 lbs41.721598 lbs
39.2°/4.0°8.345404 lbs41.72702 lbs
40°/4.4°8.345321 lbs41.726605 lbs
50°/10°8.343318 lbs41.71659 lbs
60°/15.6°8.337643 lbs41.688215 lbs
70°/21°8.328881 lbs41.64405 lbs
80°/26.7°8.317781 lbs41.588905 lbs
90°/32.2°8.304512 lbs41.52256 lbs
100°/37.8°8.288489 lbs41.442445 lbs

How lot Does 5 Gallons the Water Weigh?

Trying to number out exactly how much a 5-gallon bucket the water weighs? at room temperature, 5 gallons of water weighs 41.64 pounds, yet at 32.2 °F that weighs 41.727 pounds.

You can use the calculator or weight chart above for the complete five-gallon weight range.

Working on a pipes project? use our pipe volume calculator to calculation the volume and also weight that the water in your plumbing system.

How much Does One Molecule the H2O Weigh?

In the chemistry field, water is also referred to as H2O. It’s an oxygen hydride that consists of a single oxygen atom external inspection to 2 hydrogen atoms.<3>

In bespeak to recognize the weight of every H2O molecule, you need to an initial find its molar mass.

H2O Molar Mass

You can uncover molar mass of H2O by recognize the massive of each element in the molecule and including them together.

The fixed of hydrogen is 1.00794 g/mol and also oxygen is 15.9994 g/mol. Since it contains two hydrogen atoms and also one oxygen atom, the molar fixed formula because that H2O is:

H2O molar massive = 1.00794 + 1.00794 + 15.9994H2O molar massive = 18.01528

Therefore, the molar fixed of H2O is 18.01528 g/mol, or 18.01528 grams every mole.

After detect the molar mass, friend can uncover the weight of a molecule utilizing Avogadro’s constant, which claims that one mole is equal to 6.02214076 × 1023 elementary devices of matter, such together a molecule. That’s a quite big large number, for this reason it’s typically represented using clinical notation.

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Using this continuous and the molar massive above, the formula to find the weight of one H2O molecule is:

H2O molecule load = 18.01528/6.02214076 × 1023H2O molecule load = 2.9915 × 10-23 g

So, one molecule the H2O weighs 2.9915 × 10-23 grams.


U.S. Department of the Interior, bureau of Reclaimation, ground Water Manual, from The Water Encyclopedia, 3rd Edition, Hydrologic Data and also Internet Resources, 1977, Edited by Pedro Fierro, Jr.and Evan K. Nyler, 2007, Department of the Interior, united state Geological Survey, Water Density, center for Biotechnology Information, PubChem Compound an overview for CID 962, Water, 2021,