Blast Perimeter 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 perimeter.
How it works
Perimeter = 2 × (length + width) — useful for exclusion-zone and edge-protection planning.
Worked example
40 m × 25 m. Perimeter = 130 m.
Frequently asked questions
Why do I need the perimeter?
To plan edge protection, stemming for perimeter holes and the exclusion/clearance zone around the blast.
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.