Density Calculator
Enter two values to compute the third.
Core relationship:
Density (rho) = Mass (m) / Volume (V)
Rearrangements:
Mass = rho * V
Volume = m / rho
Example 1 (Density): m = 10 kg, V = 0.005 m^3 -> rho = 10 / 0.005 = 2000 kg/m^3
Example 2 (Mass): rho = 7850 kg/m^3 (steel), V = 0.002 m^3 -> m = 15.7 kg
Example 3 (Volume): rho = 1000 kg/m^3 (water), m = 1.5 kg -> V = 0.0015 m^3
What is density?
Density is mass per unit volume. Common units: kg/m³, g/cm³. Water at ~4°C has ~1000 kg/m³ (1 g/cm³).
How do I convert between g/cm³ and kg/m³?
1 g/cm³ = 1000 kg/m³. Multiply g/cm³ by 1000 to get kg/m³.
Why do I need only two of three values?
Density, mass, and volume are related: ρ = m/V. Given any two, you can compute the third.
Are temperature effects included?
No. Density can vary with temperature and pressure. This tool assumes a constant density for your input.
What is density?
Mass per unit volume. Common units: kg/m³, g/cm³.
📐 Formula
Core relationship:
Density (rho) = Mass (m) / Volume (V)
Rearrangements:
Mass = rho * V
Volume = m / rho
📝 Example Calculation
Example 1 (Density): m = 10 kg, V = 0.005 m^3 -> rho = 10 / 0.005 = 2000 kg/m^3
Example 2 (Mass): rho = 7850 kg/m^3 (steel), V = 0.002 m^3 -> m = 15.7 kg
Example 3 (Volume): rho = 1000 kg/m^3 (water), m = 1.5 kg -> V = 0.0015 m^3
❓ Frequently Asked Questions
What is density?▼
Density is mass per unit volume. Common units: kg/m³, g/cm³. Water at ~4°C has ~1000 kg/m³ (1 g/cm³).
How do I convert between g/cm³ and kg/m³?▼
1 g/cm³ = 1000 kg/m³. Multiply g/cm³ by 1000 to get kg/m³.
Why do I need only two of three values?▼
Density, mass, and volume are related: ρ = m/V. Given any two, you can compute the third.
Are temperature effects included?▼
No. Density can vary with temperature and pressure. This tool assumes a constant density for your input.
What is density?▼
Mass per unit volume. Common units: kg/m³, g/cm³.