Odds & probability
Enter your numbers — the results update instantly.
Probability16.67 %
Decimal odds6
At least once in 10 tries83.85 %
Worked example
Given: Favourable outcomes = 1; Unfavourable outcomes = 5
Result: Probability = 16.67 %; Decimal odds = 6; At least once in 10 tries = 83.85 %
How it is calculated
1. Enter the values you know. 2. The calculator converts them to base units and applies the formula. 3. The result is shown in the unit you choose.
Frequently asked questions
How do I calculate it?
Given: Favourable outcomes = 1; Unfavourable outcomes = 5. Result: Probability = 16.67 %; Decimal odds = 6; At least once in 10 tries = 83.85 %.
Is the calculator free and private?
Yes. It is free, needs no sign-up and runs in your browser — the numbers you type stay on your device.