How to Convert Density
Enter the density value you want to convert in the Value field.
Select the unit you are converting from in the From dropdown.
Select the unit you want to convert to in the To dropdown.
Click Convert to see the result.
Key Features
42 Units Covered
Supports SI base units (kg/m³), metric /liter variants with full SI prefix range, imperial units (lb/ft³, lb/in³, oz, grain), and specialist units like slug/ft³ and psi/1000 ft.
Precise Results
Uses exact base multipliers relative to kilogram/cubic meter. Results show full precision without trailing zeros, and switch to scientific notation automatically for extreme values.
Works Offline
All conversions run entirely in your browser. No internet connection is needed after the page loads.
Privacy-First
No data is ever sent to a server. Your measurements stay on your device.
Privacy & Security
This tool runs entirely in your browser. No values are transmitted to any server, stored, or logged. It is safe to use with sensitive measurements or in offline environments.
Frequently Asked Questions
How accurate are the conversions?
Each unit is defined by an exact multiplier relative to kilogram/cubic meter. The conversion formula is: result = value × (from unit factor) ÷ (to unit factor). Results are shown to 10 significant figures before trailing zeros are removed.
What is the base unit used for conversions?
All conversions go through the kilogram per cubic meter (kg/m³) as the base unit. Every other unit is stored as its exact value in kg/m³, so any pair of units can be converted without a lookup table.
Why does the result show scientific notation?
Scientific notation is used automatically when the result is smaller than 1×10⁻⁶ or larger than 1×10¹⁵. This keeps the output readable for extreme conversions such as attogram/liter to kilogram/cubic centimeter.
Is gram/cubic centimeter the same as kilogram/liter?
Yes. 1 g/cm³ = 1 kg/L = 1000 kg/m³. These are equivalent units and both are listed because both notations are commonly used in chemistry and engineering.
What is slug/cubic foot used for?
Slug per cubic foot is an imperial unit used in fluid mechanics and aerospace engineering in countries that use the foot-pound-second (FPS) system. 1 slug/ft³ ≈ 515.38 kg/m³.
What is psi/1000 feet?
PSI per 1000 feet is a pressure-gradient unit used in petroleum engineering to express the density of drilling fluids and fluid columns. 1 psi/1000 ft ≈ 2.307 kg/m³.