Corebox Calculator

This calculator provides a preliminary indication of some aspects of mine economics. Generally, financiers like to see projects with a payback of less than four years. Please contact us if you have a comment or a suggestion.

Payback (years)
Mine life (years)
Value recovered per tonne
Effective cost per tonne of ore

Annual Revenue & Costs

Revenue
Operating costs
Refining or smelting fee
Royalties payable
Annual margin

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• Enter all numbers without commas or symbols (ie: '$' and '%').
• Enter all prices and costs in $US currency.
• Years to payback begins after production starts - not after the capital is raised.
• Production is assumed to be the same each year.
• All calculations are pre-tax.