Density Converter
Convert kg/m³, g/cm³, g/mL, lb/ft³ and lb per US gallon.
Quick answer
- Formula: Result = Value × (factor of from-unit in kg/m³) ÷ (factor of to-unit in kg/m³)
- Worked example — Converted density: 1,000.000000 (full example below).
Density Converter
| Converted density | 1,000.000000 |
| Summary | 1 g/cm³ = 1000 kg/m³ |
1 g/cm³ is exactly 1000 kg/m³ — the density of water, and the reason the two unit systems convert so cleanly.
Convert density through kilograms per cubic metre. The metric units line up neatly: 1 g/cm³ = exactly 1000 kg/m³, and g/mL is the same thing (water at 4 °C is 1.000 g/cm³). The imperial units: 1 lb/ft³ = 16.0184634 kg/m³ and 1 lb per US gallon = 119.826 kg/m³.
Reference points: water 1000 kg/m³, ice 917, aluminium 2700, steel about 7850, gold 19,300 — dense enough that a gold brick weighs roughly 12.4 kg.
The formula
Worked example
1 g/cm³ is exactly 1000 kg/m³ — the density of water, and the reason the two unit systems convert so cleanly.
The example is pre-loaded in the result panel — press Calculate with your own numbers to replace it.
Frequently asked questions
What is the density of water in lb/ft³?
About 62.43 lb/ft³ (1000 kg/m³ ÷ 16.0184634). Engineers often round to 62.4.
Are g/cm³ and g/mL different?
No — since 1 cm³ is exactly 1 mL, the values are identical. Labs use g/mL for liquids and g/cm³ for solids, but the number never changes.
How do I get specific gravity from density?
Divide the density in kg/m³ by 1000 (or read g/cm³ directly) — specific gravity is density relative to water, so the g/cm³ value is the specific gravity.
Category: Unit Conversions calculators
Sources & methodology
This calculator applies the formula shown on this page exactly as written, using the standard definitions for its inputs. Results are computed from the values you enter — no data is stored — and are rounded only for display.
Content last reviewed by CalcHub Editorial.
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