how to calculate 18 carat gold rate

how to calculate 18 carat gold rate?

Gold is usually priced in 24 carat (pure gold), so to find the 18 carat rate, you just need to calculate 75% of the 24 carat price because 18k gold has 75% pure gold mixed with other metals.
For example, if today’s 24k gold price is ₹6,000 per gram, then the 18k gold price will be 6,000 × 75% = ₹4,500 per gram. On top of that, jewellers usually add making charges and taxes, which increase the final cost of the jewellery.