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Engineering ToolBox > Water - Density and Specific Weight
At aprox. 4oC (39.2oF) pure water has it's highest density (weight or mass) 1 g/cm3 = 1 g/ml =
1 kg/litre = 1000 kg/m3 = 1 tonne/m3 = 62.4 lb/ft3 = 8.34 lb/gallon.
| 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.
| Temperature - t - (oC) | Density - ρ - (kg/m3) | Specific Weight - γ - (kN/m3) |
| 0 | 999.9 | 9.806 |
| 5 | 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 |