Gold purity (karat) calculator
See what a karat means in percentage and hallmark number, and how much pure gold is in your jewellery.
| Karat | Pure gold | Hallmark |
|---|---|---|
| 24K | 99.9% | 999 |
| 23K | 95.8% | 958 |
| 22K | 91.6% | 916 |
| 21K | 87.5% | 875 |
| 20K | 83.3% | 833 |
| 18K | 75.0% | 750 |
| 14K | 58.5% | 585 |
| 9K | 37.5% | 375 |
How it works
The BIS hallmark number is the gold content in parts per thousand, so 916 means 91.6% gold. Pure gold content is weight multiplied by that fraction.
Always confirm measurements for a purchase or registration with official records.
Advertisement
Questions people ask
How much pure gold is in 10 g of 22K jewellery?
10 g × 0.916 = 9.16 g of pure gold.
More calculators
Plot area calculatorArea of any plot, in every local unit
Acre, gunta and cent calculator2 acres 20 guntas? Get the exact total
Jewellery price calculatorGold value, wastage, making and GST in one bill
Brick and mortar calculatorBricks, cement and sand for a wall
Concrete and cement calculatorCement bags, sand and aggregate by grade