Density Calculator
Calculate density instantly in your browser — the published formula, worked locally with no data sent anywhere.
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What this tool does
Calculate density instantly in your browser — the published formula, worked locally with no data sent anywhere. Density is averaged over the whole sample — a hollow or composite object uses its total mass and total outside volume. Water at 4 °C is 62.4 lb/cu ft (1000 kg/m³), the reference for the relative-density output.
How to use the Density Calculator
- Enter or select solve for.
- Enter or select mass in lb.
- Enter or select volume in cuft.
- Enter or select density (lb/cu ft).
- Read the calculated result; change any measurement to compare alternatives.
Formula
density ρ = mass / volume — any one of the three follows from the other two. 1 lb/cu ft = 16.0185 kg/m³.
- solve
- Solve for
- mass
- Mass (lb, before metric conversion)
- volume
- Volume (cuft, before metric conversion)
- dens
- Density (lb/cu ft)
Density is averaged over the whole sample — a hollow or composite object uses its total mass and total outside volume. Water at 4 °C is 62.4 lb/cu ft (1000 kg/m³), the reference for the relative-density output.
Worked example
For density calculator, the following measurements illustrate the exact method: Solve for: density; Mass: 62.4; Volume: 1; Density (lb/cu ft): 62.4.
Inputs
- Solve forDensity (mass & volume known)
- Mass62.4 lb
- Volume1 cuft
- Density (lb/cu ft)62.4
Result
- Density (lb/cu ft)62.4
- Density (kg/m³)999.55
- Density (g/cm³)1
- Relative density vs water1
Results explained
- Density (lb/cu ft)
- Density (lb/cu ft) from the formula above. Density is averaged over the whole sample — a hollow or composite object uses its total mass and total outside volume. Water at 4 °C is 62.4 lb/cu ft (1000 kg/m³), the reference for the relative-density output.
- Density (kg/m³)
- Density (kg/m³) from the formula above. Density is averaged over the whole sample — a hollow or composite object uses its total mass and total outside volume. Water at 4 °C is 62.4 lb/cu ft (1000 kg/m³), the reference for the relative-density output.
- Density (g/cm³)
- Density (g/cm³) from the formula above. Density is averaged over the whole sample — a hollow or composite object uses its total mass and total outside volume. Water at 4 °C is 62.4 lb/cu ft (1000 kg/m³), the reference for the relative-density output.
- Relative density vs water
- Relative density vs water from the formula above. Density is averaged over the whole sample — a hollow or composite object uses its total mass and total outside volume. Water at 4 °C is 62.4 lb/cu ft (1000 kg/m³), the reference for the relative-density output.
Frequently asked questions
density ρ = mass / volume — any one of the three follows from the other two. 1 lb/cu ft = 16.0185 kg/m³.
Density is averaged over the whole sample — a hollow or composite object uses its total mass and total outside volume. Water at 4 °C is 62.4 lb/cu ft (1000 kg/m³), the reference for the relative-density output.
Every field is labelled with its unit — enter values in exactly the labelled unit and read the result in the labelled output unit. Fields with a unit symbol also support the site-wide imperial/metric switch, which converts before the formula runs.
It uses double-precision arithmetic and the published constants and formulas named on this page. The last displayed digit may be rounded, and real conditions can differ from the idealized model described in the assumptions.
Yes. Every calculation runs entirely in your browser; nothing you enter is uploaded, stored or shared.