Estimate Weight After Melting
Separate material removal from process loss.
The fine-gold figure assumes the entered karat represents the starting material composition. It is not an assay result.
How the Gold Melting Weight Calculation Works
Process Loss = Clean Material × Loss %
Expected Post-Melt Weight = Clean Material − Process Loss
This calculation deliberately separates material that is expected to be removed from the process from the additional weight loss assumed during melting and handling.
Melting Weight Is Not the Same as Gold Purity
A lower post-melt weight does not automatically mean that the gold purity changed by the same amount. Weight and composition are different measurements.
Why There Is No Universal Melting-Loss Rate
Actual process loss can vary with the material, furnace or melting method, crucible and tools, residues, handling, recovery practices and process conditions. A single percentage cannot accurately represent every operation.
That is why the calculator leaves the expected loss percentage under your control instead of presenting a universal number as fact.
Worked Example
Suppose the starting material weighs 100 g. Assume 2% removable material and 0.5% subsequent process loss.
Process Loss = 98 × 0.5% = 0.49 g
Expected Post-Melt Weight = 98 − 0.49 = 97.51 g
What This Calculator Cannot Predict
The tool does not model individual furnace behavior, chemical reactions, crucible retention, volatilization, slag composition or the exact recovery of every precious-metal fraction. It is a mass-planning calculator.
Frequently Asked Questions
Does gold lose weight when it is melted?
Practical processing can produce measurable loss, although melting itself does not simply destroy gold.
How is expected melting weight calculated?
The calculator removes the entered material percentage and then applies the entered process-loss percentage.
Is there a universal gold melting loss percentage?
No. Actual loss depends on the material and process.
Does this calculate gold purity?
No. Weight after melting and purity are separate measurements.
Can it guarantee final molten weight?
No. The actual material should be measured after the process.