Quick example
Convert 1 g/cm³ to kg/m³
One gram is 0.001 kilogram, while one cubic centimeter is 0.000001 cubic meter. Dividing those values gives exactly 1,000 kilograms per cubic meter.
Quick reference
Common density conversions
| Starting density | Equivalent |
|---|---|
| 1 g/cm³ | 1,000 kg/m³ |
| 1 g/cm³ | 1 g/mL |
| 1 g/cm³ | 1 kg/L |
| 1 g/cm³ | 62.42796058 lb/ft³ |
| 1 g/cm³ | 0.036127292 lb/in³ |
| 1 g/cm³ | 8.345404452 lb/US gal |
| 1 lb/ft³ | 16.01846337 kg/m³ |
| 1 lb/US gal | 119.8264273 kg/m³ |
Unit definitions
Metric and US customary density
kg/m³
Kilograms per cubic meter is the SI density unit and expresses mass in kilograms contained in one cubic meter.
g/cm³, g/mL, and kg/L
These three metric units are numerically identical. Each is exactly 1,000 kg/m³.
lb/ft³ and lb/in³
These US customary units use the international avoirdupois pound with exact foot and inch definitions.
lb/US gal
Pounds per US gallon uses the US liquid gallon of exactly 3.785411784 liters, not the larger imperial gallon.
Material conditions
A unit conversion does not identify a material
A substance's density can vary with temperature, pressure, purity, and composition. Water is close to 1 g/mL near 4 °C, but that familiar value is not exact under every condition. This converter changes units only and accepts zero as an ideal limiting value; negative density is not accepted.
Common questions
Density conversion FAQ
How many kilograms per cubic meter are in one gram per cubic centimeter?
One gram per cubic centimeter equals exactly 1,000 kilograms per cubic meter.
Are g/cm³, g/mL, and kg/L equivalent?
Yes. Those three units are exactly equal, and each equals 1,000 kg/m³.
How many pounds per cubic foot are in one gram per cubic centimeter?
One gram per cubic centimeter equals approximately 62.4279605761 pounds per cubic foot.
Is water exactly one gram per milliliter?
Not under every condition. Water is close to 1 g/mL near 4 °C, but density varies with temperature, pressure, and composition.
What is the difference between density and specific gravity?
Density has mass-per-volume units. Specific gravity is a dimensionless ratio to a stated reference density.