Calculate density, mass, or volume from the other two known values using density = mass ÷ volume, then review editable material examples.
Last updated
Material inputs
Enter mass and volume to calculate density and compare it with common materials.
Editable examples
Start with a classroom, kitchen, or materials example, then adjust the values and units for your measured sample.
Result
1 kg spread across 1 L gives a density of 1000 kg/m³. That is close to Water.
1,000
Density
1,000
kg/m³
Water
Closest reference
0.1 m
Equivalent cube side
| Solved value | 1,000 kg/m3 |
| Density in selected unit | 1,000 kg/m3 |
| Mass in selected unit | 1 kg |
| Volume in selected unit | 1 L |
| Conversion | Value |
|---|---|
| Density | 1,000 kg/m³ |
| Density | 1 g/cm³ |
| Density | 1 kg/L |
| Density | 1,000 g/L |
| Density | 62.43 lb/ft³ |
| Mass | 1 kg |
| Mass | 1,000 g |
| Volume | 0.001 m³ |
| Volume | 1 L |
| Reference | Density | Selected vs ref |
|---|---|---|
| Air | 1.23 kg/m³ | 816.33× |
| Water | 1,000 kg/m³ | 1× |
| Concrete | 2,400 kg/m³ | 0.42× |
| Steel | 7,850 kg/m³ | 0.13× |
| Gold | 19,300 kg/m³ | 0.05× |
Science — Physics
Density describes how much mass is packed into a given volume. This density calculator lets you solve for density, mass, or volume from the other two values, then compare the result with common reference materials such as water, concrete, steel, and gold.
Density (ρ) equals mass (m) divided by volume (V). Rearranging gives mass = ρ × V and volume = m ÷ ρ. SI units for density are kilograms per cubic metre (kg/m³), but grams per cubic centimetre (g/cm³) and kilograms per litre (kg/L) are common in practice.
Water at 4 °C has a density of exactly 1000 kg/m³ (1 g/cm³), which serves as a practical benchmark. Objects less dense than the surrounding fluid float; objects denser sink — a consequence of Archimedes' principle.
If a sample has a mass of 1 kg and a volume of 1 L, first convert the volume into cubic metres: 1 L = 0.001 m³. Then apply ρ = m ÷ V = 1 ÷ 0.001 = 1000 kg/m³.
That is the benchmark density of water. This is also why 1 g/cm³, 1 kg/L, and 1000 kg/m³ all describe the same material density in different unit systems.
Air at sea level is approximately 1.225 kg/m³. Wood ranges from 400–900 kg/m³ depending on species. Concrete is 2000–2500 kg/m³, aluminium 2700 kg/m³, steel 7850 kg/m³, copper 8900 kg/m³, lead 11 340 kg/m³, and gold 19 300 kg/m³.
Density can be used to identify unknown materials by measuring mass on a scale and volume through water displacement.
Further reading
Many density calculator searches are really practical mass volume density calculator questions: How much will this steel part weigh? How much space does a gold sample occupy? Is cooking oil less dense than water? The editable examples preload those common situations so you can see the calculation pattern before entering your own measurement.
The examples are not locked presets. After loading water, oil, steel, or gold, you can change the solve mode, density unit, mass unit, or volume unit and keep the same result workflow.
Volume can be hard to picture when the answer is a small cubic metre value or a large number of cubic centimetres. The equivalent cube side shows the side length of a cube with the same volume, which makes the result easier to sanity-check.
For example, a small metal part may have a volume that sounds abstract in cubic metres but becomes more intuitive when shown as a cube side in metres. It is only a visualization aid; the actual object can be any shape.
A quick density comparison against water is often more useful than the raw number alone. In fresh water, a sample with density below about 1000 kg/m³ usually floats, a sample above that benchmark usually sinks, and a sample very close to it can behave differently as temperature, salinity, trapped air, or measurement precision change.
That is why the calculator's reference comparison is useful for more than unit conversion. It helps you judge whether a measured sample behaves more like a light wood product, a near-neutral plastic, or a much denser construction metal.
Frequently asked questions
Engineers use density to calculate structural loads, select materials for weight-critical applications, and predict buoyancy. Aircraft design, for example, depends on finding materials with the highest strength-to-density ratio.
Use the water-displacement method: submerge the object in a known volume of water and measure how much the water level rises. The rise multiplied by the container's cross-sectional area gives the object's volume.
Most substances expand when heated and contract when cooled. If mass stays the same while volume changes, density changes too. Liquids and gases are especially sensitive to temperature, so reference values should be treated as approximations unless the temperature is specified.
Yes. Measure the sample's mass and volume, calculate density, and compare the result to the common reference materials shown on the page to narrow down the material type.
Usually yes. If the same mass occupies a smaller volume, density increases. Compression matters most for gases, but solids can also change density slightly under high pressure.
Usually yes. If the average density of the object is below about 1000 kg/m³, it will usually float in fresh water. If it is above that benchmark, it will usually sink. Shape, trapped air, salinity, and temperature can still change the outcome, so treat the result as a practical guide rather than a guarantee.
Use mass = density × volume. In the calculator, choose Mass, enter the material density and the measured volume, then choose the mass unit you want for the answer.
Use volume = mass ÷ density. In the calculator, choose Volume, enter the material density and mass, and review the answer alongside litres, cubic metres, and the equivalent cube side.
It helps you visualise the volume result. A cube side is not saying the object is cube-shaped; it simply translates the calculated volume into a side length that is easier to picture.
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