Calculate a risk severity score from probability and impact ratings, with classification and interpretation.
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Parameters
Result
Interpretation
Risk is moderate. Plan mitigation steps and review regularly.
Also in Statistics
Statistics
A severity calculator computes a risk severity score by multiplying probability and impact ratings on a 1–10 scale. The resulting score (1–100) is classified as Low, Medium, High, or Critical, providing a quick risk assessment for project management and safety analysis.
Severity = Probability × Impact. Both factors are rated on a 1–10 scale, producing a score from 1 to 100. The score maps to four levels: Low (1–20), Medium (21–50), High (51–80), and Critical (81–100).
This approach is widely used in risk matrices for project management, safety engineering, and quality assurance.
Severity = Probability × Impact
Risk severity score formula.
Frequently asked questions
Both use a 1–10 scale where 1 is lowest (very unlikely / negligible impact) and 10 is highest (almost certain / catastrophic impact).
The standard thresholds (Low ≤20, Medium ≤50, High ≤80, Critical ≤100) are widely used, but organizations may adjust them based on their risk tolerance.
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