Gold Purity Calculator
Calculate gold purity, karat and fineness using a simple gold purity conversion tool.
Calculate Gold Purity
Select a common gold karat or enter a purity percentage to calculate its equivalent karat and fineness.
Gold Purity Calculator
GoldPriceBD's Gold Purity Calculator helps users understand the relationship between gold karat, purity percentage and fineness.
Users can select a common karat value or enter a purity percentage to calculate the corresponding gold purity measurements.
When a gold weight is provided, the calculator can also estimate how much of that weight represents pure gold based on the calculated purity.
The calculator uses 24 karat as the reference for pure gold and expresses purity as a percentage and fineness.
Actual jewellery purity may vary depending on manufacturing, alloy composition, testing method and applicable standards.
Frequently Asked Questions
What is gold purity?
Gold purity describes how much of an item is pure gold compared with other metals in the alloy. It is commonly expressed as karat, percentage or fineness.
What does 24K gold mean?
24K is used as the reference karat for pure gold. In practical jewellery and bullion standards, the stated fineness may be slightly below 1000 depending on the product standard.
What is 22K gold purity?
22K gold corresponds to approximately 91.67% pure gold, or about 916.7 fineness.
What is 18K gold purity?
18K gold corresponds to 75% pure gold, or 750 fineness.
Can I calculate purity from a percentage?
Yes. Select Percentage mode and enter the purity percentage. The calculator will estimate the equivalent karat and fineness.
What is gold fineness?
Fineness expresses gold purity as parts of pure gold per 1000 parts of material. For example, 22K gold is approximately 916.7 fineness.
Can I calculate pure gold content from weight?
Yes. Enter the gold weight along with the purity information. The calculator estimates the amount of pure gold contained in that total weight.
Is this calculator a jewellery purity test?
No. It performs mathematical purity calculations. It does not physically test or verify the composition of a gold item.
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