WHAT THIS TOOL DOES

This risk calculator builds a simple score from likelihood and impact.

You can add exposure and controls when you want a slightly wider quick-risk model.

Best folder name: risk-calculator

HOW TO USE IT

Choose a model, then enter likelihood and impact scores from 1 to 5.

Use exposure and controls only when those factors are part of your scoring method.

Press SOLVE to see the working, score and risk band.

EXAMPLE

If likelihood is 3 and impact is 4, the basic score is 3 × 4 = 12.

A score of 12 is shown as a medium risk using the guide bands on this page.

Use your organisation’s own bands if they differ from this guide.

WHO USES IT

Students, project teams, safety leads, tutors and small teams use basic risk scores to compare hazards or decisions.

Common searches include risk calculator, risk score calculator, likelihood impact calculator and risk matrix calculator.

Keep the result as a guide: risk ratings depend on context, evidence and agreed scoring rules.

RISK SCORE FORMULA

Basic: score = likelihood × impact

Exposure mode adds E: score = (L × I) + E.

Controls mode subtracts C: score = (L × I) + E − C.

Scores are clamped to a minimum of zero.

BENEFITS

The calculator keeps inputs, model buttons, working and score visible on the main tool page.

Help text is separated into full-size internal pages so it does not collapse into small SEO frames.

Use it for quick comparisons, teaching examples and simple planning checks.

DEVICE HELP

On phones, the calculator uses an input page and a result page so nothing disappears behind the footer.

Extra explanations, examples and related links are split into internal pages to prevent overlap.

Keyboard: Enter solves. Escape resets to the worked example.

RELATED PAGES

This page follows the expected value calculator and links onward to the next calculators page.

Risk is often used with probability, expected value, odds and decision-making tools.