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Calcimator

Risk Exposure Calculator

Calculate EMV from probability and impact for project risks.

About this calculator

Expected monetary value (EMV) is the standard project management technique for putting a single dollar figure on an uncertain risk, calculated simply as the probability of the risk occurring multiplied by its financial impact if it does. This calculator applies that same formula to three separate identified risks, then sums the individual EMVs into a total risk exposure figure representing, in a statistical sense, what the combined risks are 'worth' in expected cost across the project as a whole. Comparing that total against the project budget produces a contingency percentage, and a recommended contingency reserve adds a flat 20% buffer on top of the raw total EMV, since EMV is an average expectation and real risk events don't arrive in neat, averaged installments — a reserve sized to only the bare expected value would run out the moment even a single risk actually materializes at its full impact.

The average risk score gives each risk a relative severity rating scaled against whichever of the three risks has the largest financial impact, so a risk with a modest dollar impact but very high probability can still score meaningfully if its impact is a substantial fraction of the largest risk's, helping prioritize attention beyond just raw dollar exposure. EMV is a useful planning tool precisely because it lets very different risks — a likely-but-minor issue and a rare-but-catastrophic one — be compared on a single scale, though it deliberately averages away the difference between a risk that's certain to happen at moderate cost and one that's unlikely but severe when it does.

Inputs

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Results

Total EMV (Risk Exposure)

$40,000.00

≈ 4 years of state college

Risk 1 EMV$15,000.00
Risk 2 EMV$15,000.00
Risk 3 EMV$10,000.00
Contingency % of Budget8%
Recommended Contingency$48,000.00
Average Risk Score3.3
How to Use This Calculator
  1. Enter each identified risk event and its probability of occurrence (0–100%).
  2. Input the potential impact in dollars or schedule days if the risk occurs.
  3. Review the risk exposure (probability × impact) for each risk.
  4. Sort risks by exposure to prioritize mitigation efforts.
  5. Allocate contingency reserve equal to the sum of exposures for top-tier risks.

How the result changes with Risk 1 Probability

Risk 1 ProbabilityTotal EMV (Risk Exposure)
15$32,500.00
23$36,500.00
45$47,500.00
75$62,500.00

What each input means

Risk 1 Probability
Likelihood of Risk 1 occurring.
Risk 1 Impact
Financial impact if Risk 1 occurs.
Risk 2 Probability
Likelihood of Risk 2 occurring.
Risk 2 Impact
Financial impact if Risk 2 occurs.
Risk 3 Probability
Likelihood of Risk 3 occurring.
Risk 3 Impact
Financial impact if Risk 3 occurs.
Project Budget
Total project budget for contingency percentage.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Risk 1 Probability = 30, Risk 1 Impact = 50000, Risk 2 Probability = 15, Risk 2 Impact = 100000 = 7 input(s) provided
  2. Calculate Total EMV
    Total EMV
    40000 = $40,000
  3. Calculate Risk 1 EMV
    Risk 1 EMV
    15000 = $15,000
  4. Calculate Risk 2 EMV
    Risk 2 EMV
    15000 = $15,000

Engine last updated . Checked against 1 independently-derived test — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.

Frequently Asked Questions

Why does the recommended contingency add a 20% buffer instead of just using the total EMV directly?

EMV represents an average expected cost across many hypothetical repetitions of the project, but in any single real project, risks either happen at their full impact or don't happen at all — they don't arrive in neatly averaged fractional amounts. The 20% buffer acknowledges that a reserve sized to the bare statistical average would frequently prove insufficient the moment even one risk actually materializes.

Can two very different risks end up with the same EMV, and what does that mean?

Yes — a risk with a 50% chance of a $40,000 impact and a risk with a 10% chance of a $200,000 impact both produce a $20,000 EMV, even though they represent very different risk profiles: one is a moderate, fairly likely cost and the other is a severe but unlikely one. EMV is useful precisely because it lets you compare these on a single scale, but it's worth remembering that identical EMV numbers can hide very different underlying risk shapes worth managing differently.

Does increasing the project budget reduce the actual risk exposure?

No — the project budget only affects the contingency percentage figure, showing what share of the budget the total EMV represents, but it has zero effect on the total EMV or recommended contingency amounts themselves, which are calculated purely from each risk's own probability and impact. A larger budget simply makes the same dollar amount of risk exposure look like a smaller percentage of the whole.

Why might a risk with a lower average risk score still deserve serious attention?

The average risk score is scaled relative to whichever of the three entered risks has the single largest financial impact, so a genuinely severe risk can still show a modest relative score if an even larger risk is also present in the list, and a risk's raw EMV dollar figure can tell a different prioritization story than its relative score does. Reviewing both the dollar-based EMV figures and the relative risk score together, rather than either one alone, gives a fuller picture for deciding where to focus mitigation effort.

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