Blast Area Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
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.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.