Gold Ore Grade Value Calculator
Gold Ore Grade Value
Calculate the value of gold ore based on grade (grams per tonne), tonnage, gold price, and estimated recovery rate from processing.
Formula
Total Gold = Grade x Tonnage; Recovered Gold = Total Gold x Recovery Rate; Troy Ounces = Recovered Grams / 31.1035; Net Value = (Troy Oz x Price) - (Tonnage x Processing Cost); Break-Even Grade = (Processing Cost x 31.1035) / (Price x Recovery)
Frequently Asked Questions
What is a good gold ore grade?
A grade of 5 to 10 grams per tonne is considered good for open-pit mining. Underground mines typically need 8+ g/t to be profitable. Some high-grade deposits exceed 30 g/t.
What is the recovery rate?
Recovery rate is the percentage of gold successfully extracted from ore during processing. Modern cyanide leaching achieves 85-95% recovery. Gravity methods recover 50-70% depending on ore characteristics.
What does break-even grade mean?
Break-even grade is the minimum ore grade needed for the gold recovered to cover processing costs. Below this grade, mining the ore results in a financial loss.
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