Karat Calculator (gold purity & rate)
From the 24 carat rate, get the rate and purity percent of 22K, 20K, 18K or 14K gold.
Quick answer
If 24K is ₹12,500/g, 22K = 11,458 ₹/g.
How it is calculated
- Purity = karat ÷ 24 × 100. 22K = 91.67%.
- Rate for that karat = 24K rate × karat ÷ 24.
- Hallmarks show 22K as 916 (91.6%).
Worked example
The 24K rate is ₹12,500 a gram. 22K purity is 91.67 % and the rate is 11,458 ₹/g.
| Karat | 22 K |
| 24K rate | 12,500 ₹/g |
| Rate for this karat | 11,458 ₹/g |
| Purity | 91.67 % |
Formula
Rate for this karat = R24×K/24 Purity = K/24×100
Good to know
- Jewellers often use 91.6% for 22K, so the rate may differ by a few rupees.
- Check the karat and HUID on BIS-hallmarked jewellery.
Questions people ask
How pure is 22 carat gold?
About 91.6–91.67%, hallmarked 916.
How do I get the 18K rate?
24K rate × 18 ÷ 24, i.e. × 0.75.
Why is jewellery not made in 24K?
24K is very soft, so other metals are mixed in to make 22K or 18K.
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Updated 13 Nov 2026 · Desktop N Calculator v1.2.0