What is the formula for density?

Electrical & MechanicalFundamental Physics Sizing

Density, Mass & Volume Calculator

Calculate density, mass, or volume across metric and imperial units using the fundamental physical equation Density = Mass ÷ Volume.

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Quick Summary & Key Answer

Density is defined as mass per unit volume: Density = Mass ÷ Volume. Pure water has a density of 1.0 g/cm³ (62.4 lbs/ft³). Objects with a density less than water have a specific gravity under 1.0 and float, while denser materials sink.

Density of water = 1.00 g/cm³ or 62.42 lbs/ft³.
Specific Gravity compares material density directly to pure water.
Gold is one of the densest common metals at 19.3 g/cm³.

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Mass (in Pounds) or Density

Volume (in Cubic Feet)

Calculated OutputSinks in Water (SG >= 1.0)

Calculated Density

62.40 lbs/ft³lbs/ft³

Specific Gravity (vs Water): 1.000
Metric Equivalent Density: 999.6 kg/m³ (1.000 g/cm³)

Note: Water has a density of 62.4 lbs/ft³ (1.0 g/cm³). Any material with specific gravity below 1.0 will naturally float in water.

Archimedes' Buoyancy Principle

An object immersed in fluid experiences a buoyant force equal to the weight of fluid it displaces.

Frequently Asked Questions

Common questions regarding this calculation and code compliance

Density = Mass divided by Volume (ρ = m / V).