Density of Ice and Liquid Water Calculator



Water Density Calculator
liquid (17.6°F - 226.4°F) (-8°C - 108°C)
ice (-148°F - 32°F) (-100°C - 0°C)

 temperature =

The state of water--solid, liquid, or gas--depends on the temperature and pressure, and the density of water depends on its state and temperature. At standard atmospheric pressure (1 atm), liquid water becomes a solid at 0°C and becomes vapor at 100°C. Under higher pressure water can exists as a super-cooled liquid below 0°C, or as a super-heated liquid above 100°C. See phase diagram below.

When water transitions from a liquid to a solid (freezes), its density decreases by about 9%, which is unusual among chemical compounds. This is the reason why ice floats in liquid water. When water is in the ice state, it's density starts to increase slightly as the temperature falls further below zero, though it never becomes as dense as liquid water. At 0°C, ice has a density of 0.9162 g/mL, and at -100°C its density is 0.9257 g/mL.


When water is in its liquid state, its density decreases as the temperature increases. At 0°C, liquid water has a density of 0.9998425 g/mL, at 100°C liquid water's density is 0.9583665 g/mL. The maximum density of liquid water does not occur at 0°C, but at 3.98°C. As water is heated from 0°C to 3.98°C the density slightly increases before it begins to decrease.

You can use the calculator on the left or the tables below to estimate the density of solid and liquid water at various temperatures.

Phase Diagram of Water

phase diagram of water

Density Tables

Liquid H₂O
Temperature °CDensity g/mL
-50.999259
00.9998425
50.9999668
100.9997026
150.9991026
200.9982071
250.9970479
300.9956502
350.9940349
400.9922187
450.9902162
500.9880393
550.9856982
600.9832018
650.9805578
700.9777726
750.9748519
800.9718007
850.9686232
900.9653230
950.9619033
1000.9583665
1050.954733
Solid H₂O (Ice)
Temperature °CDensity g/mL
-1000.9257
-900.9249
-800.9241
-700.9233
-600.9224
-500.9216
-400.9208
-300.9200
-200.9194
-100.9189
00.9162



© Had2Know 2010

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