Decking Ratio Calculator
Computes the decking ratio from charge length, hole depth and stemming for air-deck blasts.
Enter Values
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 hole depth and the total charge length.
- Press Calculate.
- Read the charge ratio and the stemming/air length.
How it works
Charge ratio = charged length ÷ total hole depth; the remainder is stemming and any air decks.
Worked example
10 m hole, 7 m charge. 70% charged, 3 m stemming/air.
Frequently asked questions
What is decking?
Splitting the explosive column with air or inert decks to control energy distribution, vibration and fragmentation.
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Cite this tool
Zerdly. (2026). Decking Ratio Calculator. Retrieved from https://www.zerdly.com/tools/decking-ratio-calculator/
Tip: Enter any known values to calculate the remaining results.
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