Probability Calculator

Calculate probability from favorable and total outcomes. Find combined probability for independent or mutually exclusive events.

Mode

Probability

30.00%

Fraction

3/10

Odds

3 to 7

Probability Details

P(Event)0.3000
P(Not Event)0.7000
As Fraction3/10
As Percentage30.00%
As Decimal0.300000
Odds (for : against)3 to 7

Use the Probability Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.