Density Calculator
Calculate density, mass, or volume using the density formula. Free online density calculator with unit conversions.
Density Calculator
Calculate density, mass, or volume with unit conversions and a common materials reference.
ρ = m / V
Common Material Densities
| Material | Category | kg/m³ | g/cm³ | lb/ft³ |
|---|---|---|---|---|
| Air (sea level) | Gas | 1.225 | 0.0012 | 0.08 |
| Water (4°C) | Liquid | 1,000 | 1.00 | 62.43 |
| Seawater | Liquid | 1,025 | 1.02 | 63.99 |
| Milk | Liquid | 1,030 | 1.03 | 64.30 |
| Olive Oil | Liquid | 920 | 0.9200 | 57.43 |
| Gasoline | Liquid | 750 | 0.7500 | 46.82 |
| Ethanol | Liquid | 789 | 0.7890 | 49.26 |
| Mercury | Liquid | 13,534 | 13.53 | 844.90 |
| Ice | Solid | 917 | 0.9170 | 57.25 |
| Wood (Oak) | Solid | 750 | 0.7500 | 46.82 |
| Wood (Pine) | Solid | 510 | 0.5100 | 31.84 |
| Concrete | Solid | 2,400 | 2.40 | 149.83 |
| Glass | Solid | 2,500 | 2.50 | 156.07 |
| Aluminum | Solid | 2,700 | 2.70 | 168.56 |
| Steel | Solid | 7,850 | 7.85 | 490.06 |
| Iron | Solid | 7,874 | 7.87 | 491.56 |
| Copper | Solid | 8,960 | 8.96 | 559.35 |
| Silver | Solid | 10,490 | 10.49 | 654.87 |
| Lead | Solid | 11,340 | 11.34 | 707.93 |
| Gold | Solid | 19,320 | 19.32 | 1206.11 |
| Platinum | Solid | 21,450 | 21.45 | 1339.08 |
Result
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Enter values to calculate
Formulas
ρ = m / V
m = ρ × V
V = m / ρ
Did You Know?
- Water has a density of exactly 1 g/cm³ at 4°C — this is by design, as the gram was originally defined as the mass of 1 cm³ of water.
- Gold is about 19.3 times denser than water. A gold bar the size of a smartphone would weigh about 1 kg.
- Objects float in a fluid if their density is less than the fluid's density. That's why ice floats on water.
How to Calculate Density
Density is a measure of how much mass is contained in a given volume. The formula is simple: Density = Mass / Volume (or ρ = m / V). This calculator lets you solve for any of the three variables — density, mass, or volume — given the other two, with full unit conversions.
Common Units of Density
- kg/m³ — SI unit, commonly used in physics and engineering
- g/cm³ — Convenient for solids and liquids (water ≈ 1.0 g/cm³)
- g/mL — Numerically identical to g/cm³, commonly used in chemistry
- lb/ft³ — Used in the US customary system
Applications of Density
Density is used in countless real-world applications: determining whether an object will float or sink, identifying unknown materials, calculating shipping weights, engineering structural components, quality control in manufacturing, and many more. Understanding density helps in fields from geology to food science to aerospace engineering.
How to Use
- 1Select what you want to calculate: density, mass, or volume.
- 2Enter the two known values with their units.
- 3View the calculated result instantly with unit conversions.