Zerdly

Risk Matrix Score Calculator

Scores risk from likelihood and consequence on a 5x5 matrix and reports the risk level.

100% FreeRuns in your browserBasic
How to use this calculator

Enter Values

Range 1–5

Range 1–5

Enter your values and press Calculate to see results.

How to use this calculator

  1. Rate the likelihood of the hazard from 1 (rare) to 5 (almost certain).
  2. Rate the consequence from 1 (insignificant) to 5 (catastrophic).
  3. Read the risk score and the indicative risk level.

How it works

A 5 × 5 risk matrix multiplies likelihood by consequence to give a score from 1 to 25, then bands it: 1–4 low, 5–9 medium, 10–14 high, 15–25 extreme.

It's a quick prioritisation aid for a JSA or take-5 — higher scores need stronger controls before work starts. Your organisation's matrix and bands take priority over this generic one.

Worked example

Likely (4) × major (4). Score = 4 × 4 = 16, which falls in the extreme band — stop and apply controls before continuing.

Frequently asked questions

Is this a substitute for a proper risk assessment?

No. It's a study/field aid for scoring one hazard. Always follow your employer's risk-assessment process, SWMS and controls.

My workplace uses different bands — which do I use?

Always your organisation's own matrix. The 1–4/5–9/10–14/15–25 bands here are a common generic example only.

Is this official course material?

No. It is free study support mapped to surveying course levels — not official North Metropolitan TAFE content or advice. Always follow your lecturer and the official assessment brief, and check your own working.

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Cite this tool

Zerdly. (2026). Risk Matrix Score Calculator. Retrieved from https://www.zerdly.com/tools/risk-matrix-score-calculator/

Tip: Enter any known values to calculate the remaining results.

Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.