What is the formula for calculating density, and what units are used for density, mass, and volume?

The formula for calculating density is density = mass / volume. Density is measured in kilograms per metre cubed (kg/m³) or grams per centimetre cubed (g/cm³), mass is measured in kilograms (kg) or grams (g), and volume is measured in metres cubed (m³) or centimetres cubed (cm³).

Cause lens: Name the cause, then state the effect on particles, pressure, density, or energy. This question asks: What is the formula for calculating density, and what units are used for density, mass, and volume. The correct response is The formula for calculating density is density = mass / volume. Density is measured in kilograms per metre cubed (kg/m³) or grams per centimetre cubed (g/cm³), mass is measured in kilograms (kg) or grams (g), and volume is measured in metres cubed (m³) or centimetres cubed (cm³)., because the particle model explains the observable property using particles. In Density of materials, the marking point should connect directly to required practical activity 5: use appropriate apparatus to determine densities of liquids. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Changes of state and the particle model, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 64 is distinct because it uses this exact question context and the cause lens rather than a generic particle-model sentence.