Specific Gravity Calculator

Yes — it's a ratio of densities.

Find specific gravity relative to water.

Specific gravity 2.7

Formula: SG = density ÷ reference density

Step-by-step with your numbers:

1. Values used:

2. Material density = 2,700 kg/m³

3. Reference (water) = 1,000 kg/m³

5. Specific gravity = Material density / Reference (water) = 2,700 / 1,000 = 2.7

Did we solve your problem today?

Specific gravity compares a material's density to water.

The math behind it

SG = material density ÷ water density (1000 kg/m³). >1 sinks, <1 floats.

Aluminum 2700 → SG 2.7.

Unitless?

Yes — it's a ratio of densities.