Density Calculator · Practical guide
Convert g/cm3 to kg/m3
Multiply g/cm3 by 1,000 to get kg/m3 — or by 62.428 to get lb/ft3 — and the calculator shows all three at once.
At a glance
Quick answer
To convert g/cm³ to kg/m³, multiply by 1,000. Water's density of 1 g/cm³ is exactly 1,000 kg/m³; to reach imperial units, multiply g/cm³ by 62.428 to get lb/ft³ (62.4 lb/ft³ for water).
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Enter your own values, then compare the result with the examples below.
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Why the Factor Is Exactly 1,000
One gram per cubic centimeter means 1 g in a cube 1 cm on a side. Scale that cube up to 1 m per side: the mass becomes 1,000 g = 1 kg, and there are 1,000 × 1,000 × 1,000 = 1,000,000 cm³ in a cubic meter. So 1 g/cm³ = 1,000 g per 1,000,000 cm³ × 1,000,000 = 1,000 kg/m³. The two units differ by a clean factor of 1,000.
Common Materials Converted
| Material | g/cm³ | kg/m³ | lb/ft³ |
|---|---|---|---|
| Water (4 °C) | 1.00 | 1,000 | 62.4 |
| Gasoline | 0.75 | 750 | 46.8 |
| Aluminum | 2.70 | 2,700 | 168.6 |
| Iron | 7.87 | 7,870 | 491.3 |
| Gold | 19.32 | 19,320 | 1,206.1 |
Converting Without Memorizing Factors
Enter any mass-and-volume pair above — for example 750 grams and 1,000 cm³ for gasoline — and read the result in kg/m³, g/cm³, and lb/ft³ simultaneously. It works in reverse too: enter a density and either mass or volume to solve the missing quantity.
Frequently Asked Questions
Is g/cm3 the same as g/mL?
Yes, they are identical — one milliliter is exactly one cubic centimeter, so 1 g/mL = 1 g/cm3 = 1,000 kg/m3.
How do I convert kg/m3 back to g/cm3?
Divide by 1,000. A material with a density of 2,700 kg/m3 is 2.7 g/cm3.
What is the conversion from kg/m3 to lb/ft3?
Multiply kg/m3 by 0.062428. So 1,000 kg/m3 (water) is about 62.4 lb/ft3.
Why do scientists prefer kg/m3 while engineers use lb/ft3?
kg/m3 is the SI standard used in science and most of the world, while lb/ft3 remains common in US construction and HVAC work. The conversions are exact constants, so pick whichever your project requires.