Calculate exact gold jewellery invoice amount with 24K/22K/18K purity conversion, jeweller making charges (%), 3% GST on gold + 5% GST on making, and Tola-to-Gram conversion.
| Karat Stamp | BIS Fineness Code | Pure Gold % | Best Used For | GST Rate |
|---|---|---|---|---|
| 24 Karat (24K) | 999 / 995 | 99.9% | Coins, Bars & ETFs | 3% GST |
| 22 Karat (22K) | 916 | 91.6% | Plain Gold Chains, Bangles & Mangalsutra | 3% GST + Making |
| 18 Karat (18K) | 750 | 75.0% | Diamond & Gemstone Studded Jewellery | 3% GST + Making |
| 14 Karat (14K) | 585 | 58.5% | Lightweight Daily Wear Jewellery | 3% GST + Making |
Historically 1 British Indian Tola equals 11.6638 grams, though many retail jewellers colloquially refer to 10 grams as 1 tola.