Science & Lab Tools
Density Calculator
Calculate the density of any substance by providing its mass and volume.
Reviewed by the calculator.uk.com Team · Last reviewed 29 April 2026 · Our methodology
Enter mass and volume to calculate density
Related to Density Calculator
The density calculator determines the density of a substance by using the fundamental relationship between mass and volume. Density (ρ) is defined as the mass (m) of a substance divided by its volume (V), expressed mathematically as: ρ = m/V. This calculator handles various units of mass and volume, automatically converting them to provide results in standard units.
Mass Units
The calculator accepts mass inputs in kilograms (kg), grams (g), milligrams (mg), pounds (lb), and ounces (oz). All calculations are performed by first converting to kilograms as the standard unit.
Volume Units
Volume can be entered in cubic meters (m³), cubic centimeters (cm³), cubic millimeters (mm³), liters (L), milliliters (mL), cubic feet (ft³), and cubic inches (in³). All volume measurements are converted to cubic meters for standardized calculations.
The calculator provides density results in two commonly used units: kilograms per cubic meter (kg/m³) and grams per cubic centimeter (g/cm³). Understanding these measurements helps in various scientific and practical applications.
Density in kg/m³
This is the SI unit for density. It's particularly useful for large-scale calculations and engineering applications. For example, water has a density of 1000 kg/m³ at room temperature.
Density in g/cm³
This unit is commonly used in laboratory settings and for smaller-scale measurements. Water has a density of 1 g/cm³, making it a convenient reference point for comparing the densities of other substances.
1. What is density and why is it important?
Density is a fundamental physical property that describes how much mass is contained in a given volume of a substance. It's important in many fields, from engineering to medicine, as it helps determine material properties, buoyancy, and material identification.
2. How does temperature affect density?
Temperature generally affects density inversely - as temperature increases, density typically decreases because the volume of most substances increases with temperature while mass remains constant. This relationship is particularly important in fluid dynamics and material science.
3. Why do some materials float while others sink?
Objects float or sink based on their density relative to the fluid they're in. If an object's density is less than the fluid's density, it floats; if greater, it sinks. This principle, known as buoyancy, explains why a steel ship can float despite steel being denser than water.
4. What are some common density values?
Some common density values include: Water (1 g/cm³), Mercury (13.6 g/cm³), Air at sea level (1.225 kg/m³), Ice (0.92 g/cm³), and Aluminum (2.7 g/cm³). These values are often used as reference points in scientific calculations and everyday applications.
5. What is the scientific source for this calculator?
Density as mass divided by volume, ρ = m/V, is one of the oldest quantitative relationships in physical science - the underlying idea of comparing an object's weight to a displaced volume of water dates back to Archimedes' work on buoyancy. The modern SI-consistent formula needs no elaborate citation beyond that; it's basic material in any introductory physics or chemistry course. Unit conversions in the calculator follow standard SI and imperial conversion factors.