A mining carbon calculator is useful when its boundaries, activity data and emission factors are visible. The purpose of a screening calculator is not to certify a greenhouse-gas inventory. It is to make assumptions explicit enough for a user to identify the major operational sources that deserve better data and formal review.
Start with a clear organisational and operational boundary. A mine may consume diesel in mobile equipment, stationary generators and contractor fleets while also purchasing electricity. Those sources should not be combined casually if they sit in different reporting boundaries.
Activity data should come from the strongest available operational record. Fuel invoices, tank reconciliations, fleet systems and metered electricity are stronger than rough memory. The calculator on this site leaves the diesel and grid factors editable because factor selection depends on fuel, country, year and reporting methodology.
Intensity metrics require the same discipline. Tonnes of CO₂e per tonne of ore, tonne of product or ounce of gold can help track performance only when production definitions and inventory boundaries remain consistent.
Use a screening result to ask better questions: Which source dominates? Which factor is least certain? What data should be verified? Which reduction option affects both cost and emissions? Then move to a formal GHG inventory where external reporting requires one.
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What responsible use looks like
Record the assumptions used, keep source dates, preserve the original evidence, and disclose limitations when sharing a result. Where the decision is material, regulated or safety-critical, use qualified professional review.