What's the density of water?

1 g/cm³ = 1000 kg/m³ at 4°C (maximum density). At room temperature (20°C), water is 0.998 g/cm³. Ice is ~0.917 g/cm³ (which is why it floats).

What's specific gravity?

Ratio of a substance's density to water's density. Dimensionless. Gold has SG 19.3, aluminum 2.7, mercury 13.6. SG > 1 sinks in water; < 1 floats.

Osmium at 22.59 g/cm³ — twice as dense as lead (11.34). Gold is 19.3, platinum 21.45. Depleted uranium is 19.1.

kg/m³ is the SI unit (water = 1000). g/cm³ is more intuitive for solids/liquids (water = 1). Both are common — pick what your audience expects.

No — all conversions happen in your browser.

Osmium at 22.59 g/cm³ — twice as dense as lead (11.34). Gold is 19.3, platinum 21.45. Depleted uranium is 19.1.

kg/m³ is the SI unit (water = 1000). g/cm³ is more intuitive for solids/liquids (water = 1). Both are common — pick what your audience expects.

No — all conversions happen in your browser.

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