Density Calculatorρ = m ÷ V · mass · volume · will it float?

Density equals mass divided by volume: ρ = m ÷ V. Rearranged, mass m = ρ × V and volume V = m ÷ ρ.

Weigh the object, measure its volume, then divide. A 270 g block measuring 10 × 5 × 2 cm (100 cm³) has a density of 270 ÷ 100 = 2.70 g/cm³, which matches aluminium.

Pure water is about 1,000 kg/m³ (1.000 g/cm³) near 4 °C and 998 kg/m³ at 20 °C. Seawater averages about 1,025 kg/m³.

Multiply by 1,000. 2.70 g/cm³ = 2,700 kg/m³. One g/cm³ is also exactly 1 g/mL and 1 kg/L.

Use water displacement. Read the water level in a measuring cylinder, submerge the object, read again; the difference in mL is the object's volume in cm³.

Multiply them: m = ρ × V. A 2 L bottle of olive oil (911 kg/m³) holds 0.911 × 2 = 1.82 kg of oil.

An object floats if its average density is lower than the fluid's. The fraction under the surface equals its density divided by the fluid's density: ice (917 kg/m³) floats about 89% submerged in seawater.

Specific gravity is density divided by the density of water, so it has no units. Gold has a specific gravity of about 19.3, meaning it is 19.3 times denser than water.

Osmium, at about 22,590 kg/m³, narrowly ahead of iridium. Among everyday metals, gold (19,300) and lead (11,340) are very dense.

Yes. Most materials expand when heated, so their density falls. Water is unusual: it is densest at about 4 °C, which is why ice floats and lakes freeze from the top.

Density converts between weight and volume. Liquid ingredients such as glycerin (about 1.26 g/mL) or ethanol (0.789 g/mL) are often weighed for accuracy and then expressed as a volume, or vice versa.

Multiply by 16.0185. Water's 62.4 lb/ft³ equals about 1,000 kg/m³.