Density Calculator
Solve density, mass, or volume from the other two. Supports g, kg, lb, oz, mL, L, cm^3, m^3, in^3, ft^3, gal, and fl oz with unit-safe math.
Density Calculator
Given mass and volume, find the density.
Must be greater than zero.
Must be greater than zero. 1 mL equals 1 cm³.
Pick the unit you want the answer in.
Density
1 g/cm³
This is within 5 percent of the density of pure water (1 g/cm³).
Mass
100 g
Volume
100 mL
Density
1 g/cm³
Density in common units
g/cm³
1
kg/m³
1,000
lb/ft³
62.428
Reference: common substance densities
- Water (4 °C)1 g/cm³
- Ice (0 °C)0.917 g/cm³
- Aluminum2.7 g/cm³
- Steel7.85 g/cm³
- Lead11.34 g/cm³
Values are approximate, at standard room temperature and pressure.
Frequently Asked Questions about the Density Calculator
What is the formula for density?
Density equals mass divided by volume (rho = m / V). Rearrange it to solve for mass (m = rho * V) or volume (V = m / rho). This calculator handles all three forms and the unit conversions for you.
Why is the density of water 1 g/cm^3?
Water at 4 C has a density of almost exactly 1 g/cm^3, which is the same as 1 g/mL or 1000 kg/m^3. The gram and the milliliter were originally defined from water, which is why the number is so round. Warmer or colder water shifts the value by less than 1 percent.
Is 1 mL the same as 1 cm^3?
Yes. One milliliter and one cubic centimeter are identical by definition (1 mL = 1 cm^3 = 0.000001 m^3). You can switch between them in the volume selector without changing the numeric value.
How do I convert g/cm^3 to lb/ft^3?
Multiply g/cm^3 by 62.428 to get lb/ft^3. For example, water (1 g/cm^3) is 62.428 lb/ft^3, and steel (7.85 g/cm^3) is about 490 lb/ft^3. The calculator shows the result in g/cm^3, kg/m^3, and lb/ft^3 at the same time.
Why does ice float on water?
Ice is less dense than liquid water: about 0.917 g/cm^3 versus 1.000 g/cm^3. Anything with a lower density than the fluid it sits in will float, which is why icebergs ride on top of the ocean with roughly 90 percent of their volume below the surface.