Earth Science & Energy
Blast Fragmentation Powder Factor (kg Explosive per Ton Rock)
Calculate blast fragmentation powder factor (kg explosive per ton rock) using the stated engineering or scientific relationship and adjustable field inputs.
Preparing your result…
What this calculator does
Calculates Blast Fragmentation Powder Factor (kg Explosive per Ton Rock) using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Powder factor = explosive mass ÷ rock tonnage
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Powder factor=explosive mass/rock mass. With explosive kg and rock metric tonnes, output kg/t; reciprocal rock-per-explosive and volume-based conventions are different quantities.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • CDC/Bureau of Mines defines alternative powder-factor conventions. Identify metric tonne versus USshort ton and measured broken-rock basis; denominator must be positive. This describes a completed/assumed mass ratio, not a blast design, charge selection or prediction of fragmentation size.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Explosive mass (kg) | Rock broken (t) | Powder factor |
|---|---|---|---|
| Worked example | 5,000 | 12,500 | 0.4 kg/t |
| Half the amounts | 2,500 | 6,250 | 0.4 kg/t |
| Double the amounts | 10,000 | 25,000 | 0.4 kg/t |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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