Powder Factor Calculator (kg per BCM)
Computes powder factor in kilograms of explosive per bank cubic metre or tonne.
Enter Values
Minimum 0
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the total explosive mass and the volume blasted (BCM).
- Optionally add rock density for kg per tonne.
- Press Calculate.
How it works
Powder factor = explosive mass ÷ rock volume (kg/BCM). Typical surface values are ~0.2–0.6 kg/BCM depending on rock and the result required.
Worked example
5,000 kg over 25,000 BCM. 0.20 kg/BCM.
Frequently asked questions
kg/BCM or kg/tonne?
Both are used. Divide kg/BCM by the rock density (t/m³) to get kg/tonne.
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Cite this tool
Zerdly. (2026). Powder Factor Calculator (kg per BCM). Retrieved from https://www.zerdly.com/tools/powder-factor-calculator-kg-bcm/
Tip: Enter any known values to calculate the remaining results.
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