Blast Volume Calculator
Computes blasted bank cubic metres and tonnes from burden, spacing, bench height and hole count.
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 burden, spacing, bench height and number of holes.
- Optionally enter the rock density for tonnes.
- Press Calculate.
How it works
Blast volume = burden × spacing × bench height × number of holes (in bank cubic metres). Multiply by density for in-situ tonnes.
Worked example
50 holes, 3×3.5×10 m. ≈ 5,250 BCM.
Frequently asked questions
What is BCM?
Bank cubic metres — the volume of rock in place, before it breaks and bulks up (see the swell-factor tool).
Related tools
- Powder Factor Calculator (kg per BCM)
- Blast Pattern Area Calculator
- Bench Height Checker
- Swell Factor Calculator
- Blast Pattern Designer
- Strip Ratio Calculator
Explore more in Mining, Quarry, Earthworks, Drill & Blast.
Cite this tool
Zerdly. (2026). Blast Volume Calculator. Retrieved from https://www.zerdly.com/tools/blast-volume-calculator/
Tip: Enter any known values to calculate the remaining results.
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