Water Weight Calculator

Calculate the weight of water for a given volume with this free online water weight calculator. It's a handy tool that simplifies water weight calculations for both personal and industrial use.

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!

Input:

• 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

Output:

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 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?

Solution:

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?

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

275 gallons = 275 * 2.21 275 g

allons = 607.75kg

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

How Much Does Water Weigh?

The weight of water is determined by its density. At room temperature, water has a density of about 1 kilogram per liter (kg/L), which is equivalent to 0.99802 g/ml at 21°C. Using the following formula, you can easily calculate the weight of water if you know its volume:

Mass = Density × Volume

The density in g/ml changes with temperature, so it’s essential to consider the temperature and water density when performing calculations. Our tool factors these variations to give an accurate result, using mL-to-grams conversion, grams-to-ounce conversion, and liters-to-pounds conversion.

Effect of Temperature on Water Weight:

Water weight changes with temperature due to its impact on density. As temperature rises, water becomes less dense and thus weighs less. At higher temperatures, oxygen content decreases, affecting weight. Conversely, cold water is denser because it holds more dissolved oxygen, making it heavier. For instance, the weight of 1 liter of water will vary if it is cold water or hot water.

The freezing point of water also plays a role in weight changes, as water expands when it freezes, reducing its density. This explains why ice floats on water—it's less dense. To account for these variations, use our water weight calculator, which automatically adjusts for temperature changes. You can also refer to the water density chart for reference.

Here we have arranged a table that contains the 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

Water Weight at Different Temperatures:

Here’s a quick look at how temperature affects the weight of water by volume:

Temperature ( °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

This shows that the weight of 500ml of water or any amount will change depending on whether it’s cold water or hot water. The same applies to US gallon weight or UK Imperial fluid ounce measurements. Use our volume converter to handle different units, including gallons of water weight and pounds conversion for larger quantities.

How Much Does A Gallon of Water Weigh?

A gallon of water in the US weighs about 8.34 pounds. The weight will increase proportionally with the number of gallons. Here's a quick breakdown for different volumes:

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

For smaller containers, like a 16.9 oz bottle, the weight of the water can also be easily determined using our water weight calculator.

How Much Does a Liter of Water Weigh?

One liter of water weighs approximately 2.21 pounds, but the weight fluctuates slightly with temperature. Here are examples of liters to pounds conversion:

Quantity in liters (L)	Water weight in pounds (lbs)
1	2.21
1.5	3.315
2	4.42
5	11.05
6	13.26
10	22.1
15	33.15
20	44.2

For accurate results, particularly in scientific or industrial applications, you can rely on this water-weight calculator.

 

Key Factors in Water Weight Calculations:

To calculate the weight of water, follow these steps:

1. Convert the volume to liters (if necessary).
2. Use the correct water density for the current temperature.
3. Apply the formula: Mass = Density × Volume.

Our water weight calculator simplifies these steps by doing the conversions and temperature adjustments for you. It even handles milliliters to grams conversion, a common task in kitchen measurements or laboratory settings.

Advanced Applications:

This calculator is not just for everyday use. It’s also employed in industries for pipe volume calculations, plumbing system water weight, and transporting liquids. If you need to know the H2O molecular weight (18.015 g/mol) or the molar mass of H2O, these are important details for scientific applications. You can also calculate the weight of water by volume for specific containers or volumes using our tool.

FAQ’s:

How heavy does one cup of water weigh?

A single cup of water weighs around 236 grams, which is 0.52 pounds. You can quickly verify this using our water weight calculator.

Does ice and water weigh the same?

No. Ice weighs less than water because its density is lower, which is why ice floats on water.

Is water heavier than snow?

Snow weighs about 7 pounds per cubic foot, but if the snow is wet, the weight can rise to 20 pounds per cubic foot due to the higher water content.

References:

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