Gold Purity Converter — 3 Units, Free & Instant
Convert between Gold Purity units. Choose from 3 different units including Karats, Fineness (per mille), Purity Percent.
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| From | Purity Percent (%) |
|---|---|
| Karats (K) | 4.1666667 |
| Fineness (per mille) (‰ fine) | 0.1 |
| Purity Percent (%) | 1 |
Karat, fineness and percent
Gold purity has three languages: karats (parts of 24 — 24K pure, 18K jewellery, 14K everyday), fineness (parts per thousand — the "750" or "585" stamped in the ring), and plain percent. 18K = 750 fine = 75% gold; bullion is 999.9.
Karat is not carat
The karat (purity, K) and the carat (gemstone weight, ct = 0.2 g) share an Arabic root — the carob seed — but measure entirely different things. A "1-carat 18-karat ring" has a 0.2 g diamond set in 75% gold.