How do I convert g/cm³ to kg/m³?

Multiply by 1000. So 1 g/cm³ = 1000 kg/m³ — which is the density of water. To go the other way, divide kg/m³ by 1000. The factor of 1000 comes from grams to kilograms (÷1000) and cubic centimetres to cubic metres (×1,000,000), which net out to ×1000.

Are g/cm³, g/mL and kg/L the same?

Yes, numerically. A cubic centimetre equals a millilitre, and a litre is 1000 cm³ while a kilogram is 1000 grams — so g/cm³, g/mL and kg/L are all identical and all equal 1000 kg/m³. Water is 1 in every one of them, which is why these units are so convenient.

What is the density of water?

About 1 g/cm³, which equals 1000 kg/m³, 1 kg/L, or 62.428 lb/ft³ (at 4 °C, water's densest point). It's the reference many materials are compared against — a substance with a density above 1000 kg/m³ sinks in water, and one below it floats.

How do I convert lb/ft³ to kg/m³?

Multiply pounds per cubic foot by 16.0185. So 1 lb/ft³ = 16.0185 kg/m³, and water (62.428 lb/ft³) comes back to 1000 kg/m³. To convert kg/m³ to lb/ft³, multiply by 0.062428. lb/ft³ is common in US construction and materials specs.

How does density relate to mass and volume?

Density is mass divided by volume (ρ = m ÷ V). So if you know two of the three you can find the third: mass = density × volume. This converter handles the density units; pair it with the Weight Converter for mass and the Volume Converter for volume.

Density Converter — kg/m³, g/cm³, lb/ft³ & more

From	Equals
1 g/cm³ (water)	1000 kg/m³ · 62.428 lb/ft³
1 kg/m³	0.001 g/cm³ · 0.062428 lb/ft³
1 lb/ft³	16.0185 kg/m³
g/cm³ = g/mL = kg/L	all = 1000 kg/m³

A density converter moves a value between the units of mass-per-volume: kg/m³ and g/cm³ in SI, plus lb/ft³ and lb/in³ in US/imperial. It converts your value into a base unit — kg/m³ — and back out. The neat shortcut is that g/cm³, g/mL and kg/L are all the same number (each is 1000 kg/m³), which is why water's density is a tidy 1 in all of them. A substance denser than 1000 kg/m³ sinks in water; lighter, and it floats.

Reviewed: June 20, 2026 · Author: Naveen P N, Founder — AI Calculator · Verified against: SI and imperial density factors, recomputed in code.

How the conversion works

Via a base unit

result = value × factor(from) ÷ factor(to) (factor = kg/m³ per unit)

Key factors

1 g/cm³ = 1000 kg/m³ · 1 lb/ft³ = 16.0185 kg/m³ · 1 lb/in³ = 27,679.9 kg/m³

Each unit equals a fixed number of kg/m³: a gram per cubic centimetre is 1000, a pound per cubic foot is 16.0185, and a pound per cubic inch a hefty 27,679.9. Multiply your value by the "from" unit's kg/m³-per-unit to reach kg/m³, then divide by the "to" unit's. Because density is mass ÷ volume, these factors come straight from the matching mass and volume conversions combined.

Worked example — the density of water

Scenario: water has a density of 1 g/cm³. Express it in other units.

To kg/m³

1 × 1000 = 1000 kg/m³

Same family

1 g/cm³ = 1 g/mL = 1 kg/L (all 1000 kg/m³)

To lb/ft³

1000 ÷ 16.0185 = 62.428 lb/ft³

Water is 1 g/cm³ = 1000 kg/m³ = 62.428 lb/ft³ — the reference everything is compared against. The same rule covers any material: aluminium is about 2700 kg/m³ (2.7 g/cm³), steel ~7850 kg/m³, and balsa wood ~160 kg/m³. The converter shows your value in every supported unit at once.

Related tools

Weight Converter — kg, g, lb, oz (mass).
Volume Converter — litres, gallons, m³.
Specific Gravity Calculator — relative density.
Density Calculator — ρ = m ÷ V.
All Converters — the full collection.

Frequently Asked Questions

g/cm³ to kg/m³?⌄

× 1000. 1 g/cm³ = 1000 kg/m³ (water).

g/cm³, g/mL, kg/L — same?⌄

Yes, all identical and equal to 1000 kg/m³.

Density of water?⌄

1 g/cm³ = 1000 kg/m³ = 62.428 lb/ft³.

lb/ft³ to kg/m³?⌄

× 16.0185. 62.428 lb/ft³ = 1000 kg/m³.

Density vs mass/volume?⌄

ρ = m ÷ V. Use the Weight & Volume converters for those.

Density Converter

Density conversion — Quick answer