Risk & ALE calculator
Quantitative (₹)
🔒 Runs locally in your browser. Nothing you enter is uploaded.
How to use it
- Set likelihood and impact for the qualitative rating.
- Enter asset value, exposure factor, yearly occurrence and control cost.
- Compare ALE before and after the control and read the ROSI.
Frequently asked questions
What is ALE?
Annualised Loss Expectancy = Single Loss Expectancy × Annual Rate of Occurrence.
What is ROSI?
Return on Security Investment: (risk reduction − control cost) ÷ control cost.
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