Gold purity & karat calculator
Value gold of any karat from the 24K price, per tola, gram or troy ounce.
Estimate only — not a jeweller's quote.
Need today's 24K price? See the gold rate page — it separates local sarafa rates from spot-based estimates.
How it's calculated
Value = weight (g) × 24K price per gram × (karat ÷ 24). 1 tola = 11.6638038 g; 1 troy oz = 31.1034768 g. Making charges added as % of metal value plus a fixed amount.
- Purity ratio is theoretical (karat/24); actual jewellery purity may be lower
- Jewellers may deduct wastage when buying back
Version 1.0 · exact decimal maths · inputs are not stored.
Questions
How do I convert between karats?
Multiply the 24K price by karat ÷ 24. For example, 21K gold is 21 ÷ 24 = 87.5% pure, so it is worth 87.5% of the 24K price by weight.
Is real jewellery exactly that pure?
Not always. The ratio is theoretical; actual purity can be lower. A hallmark or assay test is the only way to be sure.
How many grams are in a tola?
One tola is 11.6638 grams. A troy ounce is 31.1035 grams.