Density CalculatorFree online other calculator — instant results, no sign-up
Density from mass and volume.
About the Density Calculator
This calculator computes the volumetric mass density of a substance or object from its mass and volume. It is designed for students, laboratory researchers, and engineers who need quick density values in standard laboratory and SI units.
- Mass
- The total mass of the object or substance in grams (g); must be greater than zero.
- Volume
- The total volume occupied by the object or substance in cubic centimeters (cm³); must be greater than zero.
Formula and method
Density (g/cm³) = m / v Density (kg/m³) = (m / v) × 1000
- mMass of the substance (grams, g)
- vVolume occupied by the substance (cubic centimeters, cm³)
The calculator divides mass by volume to determine density in grams per cubic centimeter (g/cm³), formatted to four decimal places. It then multiplies this result by 1,000 to convert the value into kilograms per cubic meter (kg/m³), formatted to two decimal places.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Mass500 g
- Volume250 cm³
Results
- Density2 g/cm³
- In kg/m³2,000
How to use the Density Calculator
- 1Enter the mass of the object or sample in grams (g).
- 2Enter the three-dimensional volume in cubic centimeters (cm³).
- 3Divide mass by volume to get density in g/cm³.
- 4Multiply the g/cm³ value by 1,000 to determine the equivalent density in kg/m³.
Reading your result
A value in g/cm³ gives an immediate point of comparison against liquid water, which has a density of approximately 1 g/cm³ at standard conditions. The secondary output in kg/m³ provides the standard International System of Units (SI) measurement, where water equals roughly 1,000 kg/m³.
Limitations
The calculation assumes a homogeneous material with uniform density throughout and does not account for voids, porosity, temperature variations, or pressure effects. Inputs must be provided strictly in grams and cubic centimeters without in-line unit conversions.
Common questions
Why is the kg/m³ value exactly 1,000 times the g/cm³ value?+
One gram is 0.001 kilograms, and one cubic centimeter is 0.000001 cubic meters. Dividing 0.001 kg by 0.000001 m³ yields 1,000 kg/m³, making 1 g/cm³ exactly equal to 1,000 kg/m³.
Can I input milliliters instead of cubic centimeters?+
Yes. One cubic centimeter (cm³) is identically equal to one milliliter (mL), so liquid volumes measured in mL can be entered directly into the volume field.
What happens if a volume of zero is entered?+
Division by zero is undefined in mathematics and physically impossible for matter with mass, resulting in an invalid calculation error.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
Further reading
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Results are estimates for informational purposes and are not financial, medical or legal advice.