Blast Pattern 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 burden, spacing and number of holes.
- Press Calculate.
- Read the area each hole covers and the total.
How it works
Pattern area = burden × spacing × number of holes — the ground each hole is responsible for breaking.
Worked example
50 holes, 3 × 3.5 m. 10.5 m² per hole, 525 m² total.
Frequently asked questions
How is this different from blast area?
Blast area is the block's length × width; pattern area is holes × (burden × spacing), which should be close for a full pattern.
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.