COG Calculator

Cut-off grade and metal equivalent calculation — following the methodology of Ukraine's State Commission on Mineral Reserves (SCMR) and CRIRSCO-family codes

Calculation parameters

⬆ Upload parameters (account required)
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fill in the parameters on the left and press «Calculate cut-off grade»

Sensitivity analysis

Shows how the cut-off grade changes when price, cost and recovery deviate — a required argument for the robustness of cut-off criteria in a feasibility study.

Without an account, this calculation is open — cut-off grade, with no limits. Metal equivalent conversion and the sensitivity report (2 a month for free) — after sign-in; the report is calculated by the server, the parameters are not stored.

The result is for reference and does not replace the feasibility study of cut-off criteria: final parameters are approved in the established procedure on the basis of a full feasibility study.
Need explanations — what cut-off grade is, cut-off types, reporting codes and common mistakes: open the help.