18K Gold price per gram
18K Gold is 75.00% pure gold (fineness 750). At today's spot of $4,353.60/troy oz it's worth $104.98/gram.
Which ounce did they mean
Gold is priced in troy ounces. Kitchen and postal scales read avoirdupois ounces. They are not the same weight, so "an ounce of 18K Gold" has two different correct answers and the gap is real money.
The unit gold is traded and quoted in.
What a household scale reads when it says "1 oz".
The difference is $289.11 on one ounce of 18K Gold, because a troy ounce is 9.71% heavier. Both gram figures are exact by definition and are printed in NIST Handbook 44 Appendix C. If a buyer quotes you "per ounce", ask which ounce before you agree a price.
18K Gold calculator
Enter any weight to value your 18K Gold item at the live spot price.
Frequently asked
How much is a gram of 18K Gold?
$104.98 per gram at a spot of $4,353.60/troy oz. That's spot ÷ 31.1035 × 75.00% purity.
How much is a pennyweight of 18K Gold?
$163.26 per pennyweight (dwt). One pennyweight = 1.555 grams.
How much is a troy ounce of 18K Gold?
$3265.20 per troy ounce, which is the spot price ($4,353.60) × 75.00% purity.
How much is an ounce of 18K Gold on a kitchen scale?
$2976.09. A household or postal scale reads avoirdupois ounces of 28.349523125 grams, not the troy ounce of 31.1034768 grams that gold is priced in. The troy ounce is 9.71% heavier, so the same word means $289.11 more when a buyer says it.