Business Decision Expected Value Calculator

Core Philosophy

A clearer way to compare uncertain decisions.

Separate what you believe about the outcome from how prepared you are to execute. Then check whether the modeled gain compensates for the loss you could face.

The operating principle

Do not ask, "Will this work?" Ask, "Is this a good bet under uncertainty?"

A good bet does not require certainty. It requires enough evidence to justify the probability, enough upside to reward the risk, enough survivability to absorb being wrong, and enough repeatability to compound what is learned.

Want the full weighted-factor breakdown and the EV formula? Read the methodology in Research →

Interactive Calculator

Run the opportunity through the model.

Enter your probability estimate and net outcomes. Then check how the decision changes if the estimate is wrong. Amounts are in US dollars; use one time horizon.

Opportunity Inputs

Your estimated chance of success (%)

Use comparable past outcomes or an explicit hypothesis. Readiness scores do not set this value.

Upside if successful ($)

Net gain in the success case, after all costs, in one currency and time horizon. Do not mix revenue with net profit.

Downside if unsuccessful ($)

Net loss in the failure case, as a positive amount, over the same horizon. Include committed costs; do not count them twice.

Available risk budget ($)

The amount the business can lose without threatening the operating plan.

Adjust uncertainty and loss limit

Example settings: ±12 percentage points and a 35% exposure limit. Change these to reflect your decision.

Maximum share of risk budget to expose (%)

Your own limit. The prefilled 35% is an example, not a recommendation.

Test uncertainty (± percentage points)

Choose how far to vary your estimate. This is a sensitivity test, not a confidence interval.

Name the decision and record your evidence

Opportunity name

Opportunity type

Assumptions / context

Use the same currency and time horizon for both net outcomes. EV = your probability × net gain − failure probability × net loss. Results are scenarios, not forecasts.

View results ↓

Assess execution readiness · independent of the economics

Weighted self-assessment: —. Example scores are prefilled. Review each factor to identify execution gaps; this is not a success probability.

Weighted Scoring

Score each factor from 0 to 10. Use 5 for uncertain, 7 for strong evidence, and 9+ only when the pattern has repeated.

Business decisions are not predictions. They are structured bets.

A clearer way to compare uncertain decisions.

Run the opportunity through the model.

The point is not certainty. The point is better judgment.