# Water - Density and Specific Weight

## Density and specific weight of water at temperatures ranging 0 to 100 oC (32 to 212 oF) - in Imperial and SI Units

Pure water has its highest density 1000 kg/m3 (1.940 slugs/ft3) at temperature 4oC (39.2oF). Se the tables below.

### Density and Specific Weight of Water - Imperial Units

Temperature
- t -
(oF)
Density
- ρ -
(slugs/ft3)
Specific Weight
- γ -
(lb/ft3)(lb/US gallon)
32 1.940 62.42 8.3436
40 1.940 62.43 8.3451
50 1.940 62.41 8.3430
60 1.938 62.37 8.3378
70 1.936 62.30 8.3290
80 1.934 62.22 8.3176
90 1.931 62.11 8.3077
100 1.927 62 8.2877
120 1.918 61.71 8.2498
140 1.908 61.38 8.2048
160 1.896 61 8.1537
180 1.883 60.58 8.0969
200 1.869 60.12 8.0351
212 1.860 59.83 7.9957

Weight per US gallon is based on 7.48 gallons per cubic foot.

• 1 Gallon (U.S.) = 3.785x10-3 m3 = 3.785 dm3 (liter) = 0.13368 ft3 = 4.951x10-3 yd3 = 0.8327 Imp. gal (UK)

To convert from density in kg/m3 to other density units - or between units - use the converting values below:

• 1 kg/m3 = 0.001 kg/dm3 (kg/l) = 0.000001 kg/cm3 = 1 g/l = 0.001 g/ml = 0.0005780 oz/in3 = 0.16036 oz/gal (Imperial) = 0.1335 oz/gal (U.S.) = 0.0624 lb/ft3 = 0.000036127 lb/in3 = 1.6856 lb/yd3 = 0.010022 lb/gal (Imperial) = 0.008345 lb/gal (U.S) = 0.0007525 ton/yd3
• density converter

### Example - Water Density in unit lb/ft3

Water density at temperature 20oC is 998.2 kg/m3 (table below). The density in units lb/ft3 can with the converting value from above be calculated to

(998.2 kg/m3) 0.0624 = 62.29  lb/ft3

### Density and Specific Weight of Water - SI Units

Note! - the change in density is not linear with temperature - and the volumetric expansion coefficient for water is not constant over the temperature range.

Temperature
- t -
(oC)
Density
- ρ -
(kg/m3)
Specific Weight
- γ -
(kN/m3)
0 999.8 9.806
4 1000 9.807
10 999.7 9.804
20 998.2 9.789
30 995.7 9.765
40 992.2 9.731
50 988.1 9.690
60 983.2 9.642
70 977.8 9.589
80 971.8 9.530
90 965.3 9.467
100 958.4 9.399

### Example - Mass of Hot Water

A tank with volume 10 m3 contains hot water with temperature 90oC. From the table above the density of water at 90oC is 965.3 kg/m3. The total mass of the water in the tank can be calculated

(10 m3) (965.3 kg/m3)

= 9653 kg

## Related Topics

• Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more
• Density - Density of different solid materials, liquids and gases. Definitions and convertion calculators.

## Tag Search

• en: water density densities specific weight temperature
• de: Wasserdichte Dichten spezifische Gewicht Temperatur

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