Density Calculator
Use this free Density Calculator to calculate your Density result instantly and accurately.
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Result
What is a Density Calculator?
A density calculator solves for any one of density, mass, or volume when the other two are known. It uses the density triangle formula, making it useful for physics, chemistry, and material science problems.
How to calculate density manually (the formula)
The density formula is ρ = m/V, where ρ is density, m is mass, and V is volume. Rearranged: m = ρV and V = m/ρ. Keep units consistent throughout.
Example calculation
A substance has mass 200 g and volume 50 cm³. Density ρ = 200/50 = 4 g/cm³. If you know density is 2 g/cm³ and volume is 30 cm³, mass = 2 × 30 = 60 g.
Common mistakes
- Mixing units — If mass is in grams and volume is in cm³, density is g/cm³. Using kg and cm³ requires unit conversion first.
- Reversing the formula — Density = mass ÷ volume, not volume ÷ mass. Getting this backward gives the reciprocal.
- Forgetting to account for temperature — Density changes with temperature. Results are most accurate at the reported temperature.
Frequently asked questions
What is density?
Density is the mass per unit volume of a substance, expressed as \u03c1 = m/V. It tells how tightly packed the matter is.
How do you calculate density?
Divide mass by volume: \u03c1 = m/V. For 100 g occupying 50 cm\u00b3, density = 2 g/cm\u00b3.
How do you find mass from density and volume?
Multiply density by volume: m = \u03c1 \u00d7 V. Keep units consistent for an accurate result.
How do you find volume from density and mass?
Divide mass by density: V = m/\u03c1. This gives the volume that a given mass occupies.
What units are used for density?
Common units include g/cm\u00b3, kg/m\u00b3, and lb/ft\u00b3. Water has a density of 1 g/cm\u00b3.
Does density change with temperature?
Yes. Most substances expand when heated, increasing volume and decreasing density. Water near freezing is an exception.