Blast Area Calculator
Computes the plan area of a blast block from its length and width.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
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 blast block length and width.
- Press Calculate.
- Read the plan area.
How it works
Blast area = length × width of the block (plan area).
Worked example
40 m × 25 m. = 1,000 m².
Frequently asked questions
Plan area or surface area?
Plan (horizontal) area — used for hole-count and exclusion-zone planning.
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Explore more in Mining, Quarry, Earthworks, Drill & Blast.
Cite this tool
Zerdly. (2026). Blast Area Calculator. Retrieved from https://www.zerdly.com/tools/blast-area-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.