Gold purity to fine gold weight calculator.
Find the fine-gold and alloy portions of an ornament from its gross weight and stated karat purity.
Gold purity inputs
Use metal-only weight where available. Gross ornament weight can include stones, clasps and solder, which this purity conversion cannot identify.
Method: Gross weight is multiplied by the selected fine-gold fraction. The remainder is the non-fine-metal portion; stones must be removed separately.
Inputs used: Metal-only weight = 10 g
Assumptions: The result uses the values, units and options shown in the input snapshot.
Scope and warnings: Use metal-only weight where available. Gross ornament weight can include stones, clasps and solder, which this purity conversion cannot identify. Rounding and excluded real-world terms can make an external result differ.
How this gold purity to fine gold weight calculator works
Gross weight is multiplied by the selected fine-gold fraction. The remainder is the non-fine-metal portion; stones must be removed separately.
A worked example
A 100 g 22K item using a 91.6% fine-gold convention contains 91.6 g of fine gold before stone deductions.
Does gross ornament weight equal gold weight?
No. Gemstones, clasps, solder and other components can be included in gross weight. Enter metal-only weight where available.
Calculations run on your device. Review your results before exporting or sharing them.
Separate weight from composition
Karat describes the fine-metal proportion; it does not tell you whether the scale weight includes stones or other non-metal components. Enter a documented metal-only weight where possible.
The output is fine-gold equivalent, not a sale value. An assay and the dealer’s stated pricing basis determine a real transaction.
Published by ToolMitra — methods and editorial approach.