All math Calculators
Online Density Calculator

Online Density Calculator

Calculate density, mass, or volume from the other two using ρ = m / V, with a wide range of units.

Oops! Something went wrong. Please try again.

What Is This Tool?

The Density Calculator finds density, mass, or volume when you know the other two, using the relationship density = mass ÷ volume. Choose what to find, enter the two known values with their units, pick the unit for the answer, and it does the conversion and calculation. For example, 124 g in 1 cm³ gives a density of 124 g/cm³.

How to Use This Tool?

  • Choose whether to find density, mass, or volume.
  • Select the unit you want the answer in.
  • Enter the two known values with their units.
  • Click Calculate to see the result.

Key Features

  • Solves for density, mass, or volume.
  • Supports many mass, volume, and density units.
  • Lets you choose the unit for the answer.
  • Converts mixed units automatically.
  • Formats results to match your locale.

Examples

  • 124 g divided by 1 cm³ gives a density of 124 g/cm³.
  • 24 g/cm³ times 320 cm³ gives a mass of 7,680 g.
  • 240 g divided by 32 g/cm³ gives a volume of 7.5 cm³.
  • Water has a density of about 1 g/cm³.

Common Use Cases

  • Identifying a material from its density.
  • Finding the mass of a known volume of a substance.
  • Working out how much space a given mass occupies.
  • Converting density between metric and imperial units.
  • Checking chemistry and physics problems.

Tips & Best Practices

  • Select the correct unit for each value before calculating.
  • Choose the output unit that best fits your context.
  • Keep measurements consistent and accurate.
  • Remember density equals mass divided by volume.
  • Use positive values, as mass and volume cannot be negative.

Limitations

  • It assumes a uniform substance with constant density.
  • Values must be positive numbers.
  • Results are rounded for display.
  • It solves one of the three quantities at a time.

Frequently Asked Questions

What is the formula for density?
Density equals mass divided by volume, written ρ = m / V. Rearranged, mass equals density times volume, and volume equals mass divided by density.

Can I mix units?
Yes. Choose any unit for each value, and the calculator converts everything before computing and shows the answer in your chosen unit.

What is the density of water?
Pure water has a density of about 1 g/cm³, or 1000 kg/m³, at room temperature.

Why does the same material have different density numbers?
The value depends on the units. For example, 1 g/cm³ is the same as 1000 kg/m³ and about 62.4 lb/ft³.

Key Terminology

Density
The mass of a substance per unit of volume.
Mass
The amount of matter in an object.
Volume
The amount of space an object occupies.
g/cm³
Grams per cubic centimetre, a common density unit equal to 1000 kg/m³.
Specific gravity
The ratio of a substance's density to the density of water.

Quick Knowledge Check

Density is calculated as:
The approximate density of water is:
To find mass, you multiply density by: