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

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

Application lens: Apply the rule to the specific sample or situation instead of reciting a broad fact. This question asks: What is the formula for calculating density, and what are the units for density, mass, and volume. The correct response is The formula for calculating density is density = mass/volume. The units for density are kilograms per metre cubed (kg/m³) or grams per centimetre cubed (g/cm³), for mass are kilograms (kg) or grams (g), and for volume are metres cubed (m³) or centimetres cubed (cm³)., because density links mass and volume, so the answer must preserve which quantity is being calculated. In Density of materials, the marking point should connect directly to identify density in kilograms per metre cubed or grams per centimetre cubed, mass in kilograms or grams and volume in metres cubed or centimetres cubed. 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 19 is distinct because it uses this exact question context and the application lens rather than a generic particle-model sentence.