Solve for density, mass, or volume using ρ = m/V, with results in both g/cm³ and kg/m³.
Enter the two known values and click Calculate
This free density calculator solves for density, mass, or volume using the fundamental physics formula ρ = m/V. Choose which value you're missing, enter the two you already know, and the calculator instantly returns the result in both g/cm³ and kg/m³, the two most commonly used density units.
Density describes how much mass is packed into a given volume. Enter mass in grams and volume in cubic centimeters to solve for density, or rearrange the formula to solve for mass (density × volume) or volume (mass ÷ density) instead. Because 1 g/cm³ equals exactly 1,000 kg/m³, the calculator shows both units side by side without any extra conversion step.
Physics and chemistry students working through density problems, engineers doing quick material property checks, and anyone curious whether an object will float or sink in a given fluid. It's a formula-solving tool, not a substitute for measured material property data in engineering or scientific work.
The three rearrangements of the density formula this calculator uses
Density measures how tightly mass is packed into a given space — a small, heavy object has higher density than a large, light one of the same mass.
Because density = mass ÷ volume, simple algebra gives the other two forms — multiply to find mass, divide to find volume.
Comparing an object's density to a fluid's density predicts whether it floats (lower density) or sinks (higher density) in that fluid.
From choosing what to solve for to reading your result
Select Density, Mass, or Volume depending on which value you're missing.
Fill in the two values you already know, in grams and cubic centimeters.
See the missing value in both g/cm³ (or g) and kg/m³ (or kg) as applicable.
Solving for density, then rearranging to solve for mass
Typical density values for common substances, at room temperature and standard pressure
| Material | Density (g/cm³) | Density (kg/m³) |
|---|---|---|
| Air (at sea level) | 0.0012 | 1.2 |
| Ice | 0.917 | 917 |
| Water | 1.0 | 1,000 |
| Aluminum | 2.70 | 2,700 |
| Concrete | 2.40 | 2,400 |
| Iron | 7.87 | 7,870 |
| Copper | 8.96 | 8,960 |
| Lead | 11.34 | 11,340 |
| Gold | 19.30 | 19,300 |
These are typical reference values — actual density can vary slightly by alloy composition, temperature, purity, and pressure. Use them as a sanity check for your own calculation, not as a certified material specification.
Where solving for density, mass, or volume comes up
Solve density word problems and check your work against a reliable formula tool.
Compare a calculated density against a reference chart to identify an unknown substance.
Compare an object's density to water's to predict whether it will float or sink.
Quickly verify a material's density against a manufacturer's spec sheet.
Cross-check density calculated from measured mass and volume in a lab setting.
What this density calculator does well, and where it has boundaries
Get an accurate density calculation
Summary: This density calculator solves for density, mass, or volume using ρ = m/V, with results shown in both g/cm³ and kg/m³ — free, instant, and backed by a common-materials reference table. Pair it with the Mass Calculator or Volume Converter for related physics work.
Common questions about calculating density
Standards references to complement this calculator
Other measurement tools