Calculate the likelihood of an event happening. Simple yet powerful for games, risk assessment, statistics or everyday decisions like coin flips and lottery odds.
Informational calculator only. Verify important outputs independently before legal, tax, medical, engineering, safety-critical, contractual, employment, or compliance use.
Enter job values, review the estimate, then use the decision hints before ordering or quoting.
Number of favorable outcomes
Total number of possible outcomes
P(Event) = Number of Favorable Outcomes / Total Possible OutcomesProbability ranges from 0 to 1. Multiply by 100 for percentage.
For independent events: P(A and B) = P(A) × P(B)
Next: arithmetic mean of four values.
Next: coefficient of variation.
This geometric mean calculator helps when value 1, value 2, value 3 are already known and you want the geometric mean quickly.
Probability is chance (0–1), odds is ratio of success to failure (e. g. 1:5 odds = 1/6 probability).
No — if calculation gives >1, check your inputs (favorable cannot exceed total).