Weight is the whole item
A jewellery item’s gross gram weight can include stones, clasps or non-gold parts. Remove or separately value anything that is not part of the stated alloy.
Gold value by weight and purity.
At the hourly spot reference of $3969.60 per troy ounce, one gram of pure gold has a reference value of $127.63.
02 Nov 2026, 17:10 UTC · Gold API hourly spot reference · Delay: 22 minutes ago
Common gold purities at the latest reference.
Calculate any item →| Purity | Fine-gold share | Reference per gram | Reference per troy ounce of alloy |
|---|---|---|---|
| 24K / 999+ | 100.00% | $127.63 | $3969.60 |
| 22K / 916 | 91.67% | $116.99 | $3638.93 |
| 18K / 750 | 75.00% | $95.72 | $2977.20 |
| 14K / 585 | 58.50% | $74.66 | $2322.22 |
| 9K / 375 | 37.50% | $47.86 | $1488.60 |
From reference value to a real offer.
Reference value equals weight × purity × the source-labelled fine-gold price. A retail or scrap offer can differ because of assay, dealer margin, refining loss, making charges, tax, collectability and stones.
Use the full gold calculator for any weight and currency, check the gold chart and 52-week context, or read the karat and fineness guide.
Read weight and purity together.
Purity is the gold share
18K means 18 parts gold out of 24, or 75%. Multiplying gross metal weight by 0.75 estimates the fine-gold content before recovery losses.
A reference is not an offer
The table uses the latest stored fine-gold reference. A buyer may allow for testing, refining, price risk and margin, while a finished item may carry workmanship or collectible value.
A worked gold-value example.
Suppose a piece contains 10 grams of 18K metal and has no stones or non-gold parts. Its estimated fine-gold weight is 10 × 18 ÷ 24, or 7.5 grams. Multiply 7.5 by the current pure-gold reference per gram to estimate its metal reference value. This is a transparent starting point, not a guaranteed resale price.
If the gross weight includes stones, subtract their measured weight first. If the hallmark or assay is uncertain, test purity before relying on the result. For a buyer’s offer, compare the calculated metal value with the stated payout percentage and any fees rather than comparing only the headline price.