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Convert kg/m³ to g/cm³

Scientific conversion tool for physics and chemistry. Instantly convert Kilogram per cubic meter (SI) to Gram per cubic centimeter (CGS) with step-by-step formulas.

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About

In physics and materials science, density data often appears in mixed units. The SI standard is kilograms per cubic meter (kg/m³), used in large-scale engineering. However, chemistry and small-scale physics often favor the CGS unit, grams per cubic centimeter (g/cm³), because the density of water is nicely calibrated to approx 1 g/cm³. This tool bridges the gap. It handles high-precision floating-point numbers and scientific notation (e.g., 2.7e3), ensuring students and researchers get accurate conversions without rounding errors.

density converter physics tool chemistry units kg/m3 g/cm3

Formulas

The conversion involves both mass and volume scale factors. Since 1 kg = 1000 g and 1 m³ = 1000000 cm³, the ratio is:

1 kg/m3 = 1000 g1000000 cm3 = 0.001 g/cm3

Reference Data

MaterialDensity (SI) kg/m3Density (CGS) g/cm3
Water (4°C)10001.0
Air (STP)1.2250.001225
Aluminum27002.7
Iron78747.874
Gold1930019.3
Mercury1353413.534
Osmium (Densest)2259022.59
Aerogel10.001

Frequently Asked Questions

You are converting a larger mass unit (kg) over a HUGE volume unit (cubic meter) to smaller units. The volume difference (1 million) outweighs the mass difference (1 thousand) by a factor of 1000.
You can type standard "e" notation directly into the input. For example, for 5.5 x 10^3, type "5.5e3".
Yes. This is an exact conversion defined by the metric prefixes.
Gases have very low densities, so kg/m³ (or g/L) is preferred to avoid too many decimal zeros in g/cm³.