Density Converter
Converts density between metric and imperial units. Useful for materials work — water is 1,000 kg/m³, concrete about 2,400, and structural steel about 7,850.
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The formula
result = value × (from factor ÷ to factor)
Each density unit is defined by its size relative to the kilogram per cubic metre, so converting between any two is a single multiplication.
Every density unit
| Unit | Symbol | In one kilogram per cubic metre |
|---|---|---|
| kilogram per cubic metre | kg/m³ | 1 |
| gram per cubic centimetre | g/cm³ | 0.001 |
| kilogram per litre | kg/L | 0.001 |
| pound per cubic foot | lb/ft³ | 0.062427961 |
| pound per cubic inch | lb/in³ | 0.000036127292 |
| pound per cubic yard | lb/yd³ | 1.6855549 |
Frequently Asked Questions
What is the density of water?
1,000 kg/m³, or 1 g/cm³, or 62.43 lb/ft³ at 4 °C. The metric system was built around this, which is why the number is exactly 1,000.
How dense is concrete?
Normal-weight concrete is about 2,400 kg/m³ (150 lb/ft³). Lightweight mixes run 1,400–1,900 kg/m³.
How do I get weight from density?
Multiply density by volume. 2 m³ of concrete at 2,400 kg/m³ weighs 4,800 kg.