How this calculation works
The Density, Mass & Volume Calculator computes volumetric mass density (ρ), specific gravity relative to pure water (1.0 g/cm³), and determines whether an object will float or sink in water.
Mathematical formula and logic
Density (ρ) = Mass / Volume. Specific Gravity (SG) = Density of Object / Density of Water (1.0 g/cm³).
Worked example
An object with a mass of 270 grams occupying 100 cm³ has a density of 2.70 g/cm³ (2,700 kg/m³ — matching solid Aluminum) with a Specific Gravity of 2.70 (sinks in water).
Calculation assumptions
- Water density reference at 4°C = 1.000 g/cm³ (1,000 kg/m³).
- Homogeneous material density throughout the object volume.
Frequently asked questions
What is density?
Density is the ratio of mass to volume (ρ = m / V), measuring how tightly matter is packed within a given spatial volume.
Why do heavy steel ships float on water?
A hollow steel ship encloses a massive volume of air, making its *average* overall density significantly less than the density of water (1.0 g/cm³), displacing water according to Archimedes' principle.
What is specific gravity?
Specific gravity is a dimensionless ratio comparing the density of a substance to the density of pure water at 4°C. An SG > 1.0 sinks; an SG < 1.0 floats.
What is the densest naturally occurring element on Earth?
Osmium (element 76) is the densest natural element, with a staggering density of 22.59 g/cm³ (nearly twice as dense as lead).
How does temperature affect fluid density?
As substances heat up, thermal expansion increases volume, causing density to decrease (which drives warm air and water to rise via convection).