Calculate density, mass or volume for gold and gold alloys. Select a reference material such as pure 24K gold or a common karat alloy, or enter a custom density when you have a measured or manufacturer-specified value.
Use compatible units for accurate results.
Density expresses how much mass is contained within a given volume. For gold-related calculations, grams and cubic centimetres are convenient compatible units.
The commonly used reference density for pure gold is approximately 19.32 g/cm³ at room temperature. This value is useful as a reference when working with high-purity gold.
Karat indicates the proportion of gold by mass, but it does not uniquely specify the remaining alloy metals. For that reason, two 18K gold alloys can have different densities if their non-gold compositions differ.
| Material | Reference Density | Important Note |
|---|---|---|
| 24K / Pure Gold | 19.32 g/cm³ | Common reference value |
| 22K Gold | ~17.5 g/cm³ | Alloy composition affects actual value |
| 18K Gold | ~15.5 g/cm³ | Different recipes can vary |
| 14K Gold | ~13.1 g/cm³ | Reference estimate only |
| 10K Gold | ~11.6 g/cm³ | Reference estimate only |
| 9K Gold | ~11.0 g/cm³ | Reference estimate only |
Density can be useful as one part of a physical screening process because different materials occupy different relationships between mass and volume. However, density alone should not be treated as conclusive proof of gold authenticity.
Hollow construction, stones, solder, cavities, plating, mixed materials and uncertain alloy composition can all complicate a simple density comparison.
If a sample has a mass of 19.32 g and pure gold density is taken as 19.32 g/cm³:
This illustrates the relationship between mass and density; it does not authenticate an unknown object by itself.
The commonly used reference density is approximately 19.32 g/cm³ at room temperature.
No. Alloying generally changes density.
No. It is a screening measurement, not conclusive authentication.
Divide mass by density using compatible units.
No. Different alloy compositions can have different densities.