// multi-utility computation suite · offline · instant · precise
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eng.ore-grade-cutoff Calculator
Calculates the breakeven ore grade cutoff below which mining and processing the ore would be unprofitable from operating cost, recovery, and metal price. Ore below the cutoff grade is waste — the cutoff grade rises when metal prices fall and falls when prices rise.
Inputs
Metal Price Usd T
Reference formula or conversion factor shown for context.
Mining Cost Usd T
Reference formula or conversion factor shown for context.
Processing Cost Usd T
Reference formula or conversion factor shown for context.
Recovery Pct
Reference formula or conversion factor shown for context.
Sale Cost Pct
Reference formula or conversion factor shown for context.
Results
cut-off grade (%)
Letter or numerical grade indicating quality, creditworthiness, or performance on a defined scale.
cut-off grade (g/t, if gold)
Letter or numerical grade indicating quality, creditworthiness, or performance on a defined scale.
net smelter return
Sample size or count used in the calculation.
total cost ($/t ore)
The combined total across all inputs and components.
COG = (Cm+Cp) / (P × (1-s) × r)
Reference formula or conversion factor shown for context.
ore below cut-off
Reference formula or conversion factor shown for context.