Convert between density and specific gravity for any liquid. Enter a known density value and unit, or a specific gravity, and get instant results for tank sizing and chemical storage.
Calculate
Choose your conversion direction, then enter your known value.
Please enter a valid positive density value.
Please enter a valid positive specific gravity value.
Results
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Common Liquid Specific Gravity Values
Reference table for frequently stored liquids at approximately 20°C (68°F).
Liquid
Specific Gravity
Density (kg/m³)
Common Storage
Water (pure)
1.000
998
Potable, process water
Diesel Fuel
0.850
849
Fuel storage
Gasoline
0.737
736
Fuel storage
Sulfuric Acid (93%)
1.830
1,827
Chemical processing
Hydrochloric Acid (37%)
1.190
1,188
Water treatment
Sodium Hydroxide (50%)
1.530
1,527
Chemical processing
Ferric Chloride (40%)
1.430
1,428
Water treatment
Sodium Hypochlorite (12.5%)
1.168
1,166
Disinfection
Ethanol (100%)
0.789
788
Industrial/fuel
Glycerin
1.261
1,259
Pharmaceutical/food
Brine (25% NaCl)
1.190
1,188
De-icing, oil & gas
Acetic Acid (glacial)
1.049
1,047
Chemical storage
How It's Calculated
Specific gravity is a dimensionless ratio that compares a substance's density to the density of a reference substance, almost always water at 4°C (39.2°F).
Density → Specific Gravity
Divide the substance's density by the density of water at the same reference temperature. At 4°C, water's density is 999.97 kg/m³ (commonly rounded to 1000).
Multiply the specific gravity by the density of water at the reference temperature. The result takes the unit of whatever unit system you're working in.
Water's density changes with temperature. At 4°C it's at maximum density (999.97 kg/m³), but at 20°C it drops to about 998.2 kg/m³, and at 25°C it's roughly 997.05 kg/m³. This calculator adjusts the reference water density based on your selected temperature for more accurate results. For most industrial storage applications, the difference is small, but for precise chemical work, it matters.
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