24K
99.9%
Karat conversion tool
Gold Purity Calculator
Convert gold weight between 24K, 22K, 20K, 18K and 14K while preserving the same calculated pure-gold content.
24K to 14KPure-gold contentEquivalent weight
Convert purityPurity converter
Convert gold between karats
See how much gold at another purity would contain the same amount of pure gold.
grams
24K
99.9%
22K
91.6%
20K
83.3%
18K
75%
14K
58.5%
Equivalent weight
9.167 g
at 24K
Original gold10 g · 22K
Display purity91.6%
Pure-gold content9.167 g
Conversion
10g 22K → 9.167g 24K
This is a mathematical purity conversion. It preserves calculated pure-gold content and does not account for manufacturing loss, stones, solder or other non-gold components.
Purity reference
Compare common gold karats
Karat indicates how much of a 24-part gold alloy is represented by gold. Gold Ledger supports five commonly used purity levels.
22K
91.6%
20K
83.3%
18K
75%
14K
58.5%
Worked example
10g of 22K gold
Convert the weight to its calculated pure-gold content and then express that gold at 24K.
Starting weight10g
Karat ratio22 ÷ 24
Calculated pure gold9.167g
Therefore, 10g of 22K gold corresponds to approximately 9.167g of 24K gold under the calculator's karat-ratio model.
Karat vs percentage
Two related purity representations
Karat purity is based on a 24-part scale. For mathematical weight conversion, Gold Ledger uses ratios such as 22/24 or 18/24.
The percentage labels shown in the interface are conventional purity references—for example, 22K is displayed as approximately 91.6% and 18K as 75%.
Keeping these concepts separate prevents a rounded display percentage from changing the underlying karat conversion.
Calculator ≠ purity test
This tool cannot determine whether a physical ornament is actually 22K, 18K or another purity. It only converts the purity value you select. Actual jewellery may also include stones, solder and other non-gold components.
FAQ
Gold purity questions
What does a gold purity calculator do?
It estimates the pure-gold content of a given weight and calculates the equivalent weight at another karat while preserving the same calculated pure-gold content.
How do you convert 22K gold to 24K?
Using the karat ratio, first calculate the pure-gold content of the 22K weight and then express that amount as an equivalent 24K weight.
How much 24K gold is equivalent to 10 grams of 22K gold?
Using the 22/24 karat ratio, 10 grams of 22K gold contains approximately 9.167 grams of calculated pure-gold content, equivalent to about 9.167 grams at 24K.
How much 22K gold is equivalent to 10 grams of 24K gold?
Using the karat-ratio conversion, 10 grams of 24K gold corresponds to approximately 10.909 grams of 22K gold for the same calculated pure-gold content.
Is 22K gold the same as 91.6% purity?
22K gold is commonly represented as approximately 91.6% purity. Gold Ledger also uses the exact 22/24 karat ratio for its mathematical weight-conversion calculation.
What gold purities does this calculator support?
The calculator currently supports 24K, 22K, 20K, 18K and 14K gold.
Does this calculator determine the purity of a physical ornament?
No. It performs a mathematical conversion using the purity you select. It cannot test or certify the actual purity of a physical gold item.
Does the conversion account for stones, solder or manufacturing loss?
No. The calculation preserves theoretical pure-gold content only. Physical jewellery may contain stones, solder, other metals or manufacturing variations.