Density Calculator

Density is a physical property that describes how much mass is contained in a given volume of a substance. It is commonly represented by the Greek letter ρ (rho) and expressed as mass divided by volume. A higher density means the material's molecules are more tightly packed together.

The density formula is ρ = m / V, where ρ is density, m is mass, and V is volume. This can be rearranged to find mass (m = ρ × V) or volume (V = m / ρ) when the other two values are known.

To find density, divide the mass of an object by its volume. For example, if an object has a mass of 200 grams and a volume of 100 cm³, its density is 200 / 100 = 2 g/cm³. Use this calculator by entering mass and volume, then selecting 'Calculate Density.'

Rearrange the density formula to V = m / ρ. Enter your known density and mass values into the calculator, select 'Calculate Volume', and the tool will compute the volume in your chosen units.

Measure a known volume of the liquid (e.g., using a graduated cylinder) and weigh it on a scale, subtracting the container's weight. Divide the measured mass by the volume to get density. Water at 4°C has a density of exactly 1 g/cm³ (1000 kg/m³).

The density of water is approximately 1 g/cm³ or 1000 kg/m³ at 4°C (39.2°F), which is its point of maximum density. Water density decreases slightly as temperature rises above or drops below 4°C. Saltwater is denser, around 1.025 g/cm³.

Use the water displacement method. Submerge the object in a container of water and measure the volume of water displaced — this equals the object's volume. Then weigh the object and divide its mass by the displaced volume to find its density.

Density can be expressed in many units (g/cm³, kg/m³, lb/ft³, etc.), and mixing units leads to incorrect results. Always ensure mass and volume units are consistent. For example, if mass is in grams and volume is in cm³, density will be in g/cm³. This calculator handles unit conversion automatically.