Density Unit Conversion
Quick answer: 1 g/cm³ = 1 kg/L = 1 t/m³ = 1,000 kg/m³ ≈ 62.428 lb/ft³ and 1 lb/ft³ ≈ 16.018 kg/m³. Concrete is about 2,400 kg/m³, steel 7,850 kg/m³.
kg/m³, g/cm³, kg/L, t/m³, g/L, lb/ft³, lb/in³ and lb/gal – density of materials, liquids and bulk solids.
How the calculation works
Enter a density and choose the starting unit (for example kg/m³ or g/cm³). The table shows the same density in kg/m³, g/cm³, kg/L, t/m³, g/L and imperial units (lb/ft³, lb/in³, lb/yd³, lb/gal, slug/ft³).
Formula and assumptions
Density is mass per volume, with the base unit kg/m³. Since 1 m³ = 1,000 L = 1,000,000 cm³, 1 g/cm³ = 1 kg/L = 1,000 kg/m³. 1 lb/ft³ = 0.45359237 kg / 0.028316846592 m³ = 16.0185 kg/m³.
More worked examples
- Concrete at 2.4 t/m³ = 2,400 kg/m³ ≈ 149.8 lb/ft³.
- Steel at 7,850 kg/m³ = 7.85 g/cm³.
- Water at 62.4 lb/ft³ ≈ 1,000 kg/m³.
- EPS at 20 kg/m³ = 0.02 g/cm³.
Material densities
| Material | kg/m³ | lb/ft³ |
|---|---|---|
| water (4 °C) | 1,000 | 62.43 |
| concrete | 2,400 | 149.8 |
| steel | 7,850 | 490.1 |
| wood (spruce) | 450 | 28.1 |
| sand (bulk) | 1,600 | 99.9 |
| EPS | 20 | 1.25 |
Common mistakes
- Confusing g/cm³ and kg/m³ (a factor of 1,000).
- Mixing density with unit weight (kN/m³).
- Using the solid density instead of the bulk density for sand and gravel.
Frequently asked questions
How many kg/m³ is 1 g/cm³?
1 g/cm³ = 1,000 kg/m³ = 1 t/m³ = 1 kg/L.
What is the density of concrete in kg/m³?
Plain concrete is about 2,300–2,400 kg/m³, reinforced concrete about 2,500 kg/m³.
How do I convert lb/ft³ to kg/m³?
Multiply by 16.0185: 100 lb/ft³ ≈ 1,602 kg/m³.
Is kg/L the same as t/m³?
Yes, 1 kg/L = 1 t/m³ = 1 g/cm³, because mass and volume change by the same factor of 1,000.
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Calculations use common consumption rates and manufacturers' technical data sheets; results are estimates. Methodology · Standards · About