24K Gold Purity: Percentage, Stamp & Value Guide
24K = 99.9% gold
24-karat gold contains 99.9% pure gold by weight — 24 parts gold out of 24.
Step by step
- Purity = karat ÷ 24 = 24 ÷ 24.
- 24 ÷ 24 = 1 = 100%.
- Pure gold in 10 g of 24K = 10 × 1 = 10 g.
24K is the softest and most yellow; it is used for bullion, coins and some traditional jewelry in Asia.
Details
- Gold content
- 99.9%
- Hallmark stamp
- 999
- Pure gold per gram
- 0.999 g
- Pure gold per troy ounce
- 31.07 g
- Pure gold per tola (11.66 g)
- 11.65 g
How it works
A karat (K or kt) expresses gold purity in 24ths, so the karat number divided by 24 gives the gold fraction. Pure gold is too soft for most jewelry, so it is alloyed with copper, silver, zinc or palladium, which also change the color to rose, white or green gold. The price of a gold item depends on its pure gold weight multiplied by the current gold price, plus workmanship.
Nearby values
Related conversions
Frequently asked questions
How much gold is in 24K?
99.9%.
What is the stamp for 24K gold?
999.
Is 24K gold good for rings?
It is soft and scratches easily — fine for occasional wear.
How do I value 24K gold?
Multiply the weight in grams by 0.999 to get pure gold grams, then by the current gold price per gram.