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Gold $3,876.40/oz -0.2% Silver $49.25/oz +0.3% Platinum $1,439.00/oz +0.5% Palladium $1,001.00/oz +0.2%

JewelLoop · Gold karat & fineness converter

https://jewelloop.net/tools/gold-karat-fineness-converter/

Estimates for guidance; verify before production.

Trade tools · Metals

Gold karat & fineness converter

Convert between karats and fineness marks, and work out how much pure gold is in a piece.

Change either one; the other updates.

Result

Gold content
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Pure gold in the piece
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Other metals
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Gold standards and hallmarks

Karat Stamp Where it is used
24K999Fine gold (India BIS marks 24K as 995)
23.76K990UK hallmark standard
23.16K965Thailand: standard Thai gold, 96.5%
23K958India (BIS)
22K916UK, India, Middle East, Southeast Asia
21K875Middle East
20K833India (BIS)
18K750International (UK, India, EU, USA…)
14K585International; most common in the USA and Europe; India (BIS)
10K417USA: traditional minimum; lower karats allowed since 2018 if the karat is stated
9K375UK, Ireland, Australia: lowest hallmarked gold; India (BIS) since 2025
8K333Germany and some other countries

Silver, platinum and palladium

Metal Stamp Name
Silver999Fine silver
Silver958Britannia silver
Silver925Sterling silver
Silver800Continental silver
Platinum999Fine platinum
Platinum950Platinum 950 (most common)
Platinum900Platinum 900 (Japan, USA)
Platinum850Platinum 850
Palladium999Fine palladium
Palladium950Palladium 950
Palladium500Palladium 500

Estimates for guidance; verify before production.

Understand the result

Karat and fineness

Karat measures gold content in 24ths: 18K is 18 parts gold out of 24, or 75%. Fineness gives the same thing in parts per thousand, which is what you see stamped on the piece: 750 for 18K, 585 for 14K, 916 for 22K.

Thai gold

In Thailand, the standard for gold jewellery and bars is 96.5% gold, about 23.2K. It is traded by the baht weight rather than by the gram.

Hallmarking rules differ between countries. Check the law of the market you sell into before stamping.

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