Density Converter
Convert between kg/m³, g/cm³, g/L, mg/mL, lb/ft³, lb/in³, oz/in³, and oz/gal instantly.
Result
—
—
All conversions
What is Density Converter?
A density converter lets you switch between different units of density — mass per unit volume — used across science, engineering, cooking, and industry. The SI unit is kilograms per cubic metre (kg/m³), but grams per cubic centimetre (g/cm³) is common in chemistry, while pounds per cubic foot (lb/ft³) is widely used in construction and materials.
How to use
- 1 Enter the density value in the Value field.
- 2 Select the unit you are converting from in the From dropdown.
- 3 Select the unit you want to convert to in the To dropdown.
- 4 The result and a full table of all equivalent densities appear instantly.
- 5 Click the swap button to reverse the conversion.
Formula
Example calculation
Water has a density of 1 g/cm³ = 1000 kg/m³ = 62.428 lb/ft³. To convert 8.05 lb/ft³ to kg/m³: 8.05 / 0.0624279606 = 128.93 kg/m³.
Frequently asked questions
What is the density of water in kg/m³?
Pure water at 4°C has a density of exactly 1000 kg/m³, or equivalently 1 g/cm³ and 1 g/mL. This is why g/cm³ and g/mL are equal — 1 cm³ of water weighs 1 gram.
What is the difference between g/cm³ and g/mL?
They are exactly equal. One millilitre (mL) is defined as one cubic centimetre (cm³), so g/cm³ and g/mL represent the same density. Both equal 1000 kg/m³.
How do I convert lb/ft³ to kg/m³?
Multiply lb/ft³ by 16.0185. For example, 62.4 lb/ft³ × 16.0185 = 999.6 kg/m³, approximately the density of water.
What does a density greater than 1 g/cm³ mean?
A substance with density greater than 1 g/cm³ will sink in pure water. Most metals, rocks, and many plastics are denser than water. Ice is less dense than liquid water (0.917 g/cm³), which is why it floats.
What is the density of air in kg/m³?
Dry air at sea level and 15°C has a density of about 1.225 kg/m³ — roughly 800 times less dense than water. This is why objects float in water more easily than in air.