Probability Calculator
Work with single-event odds and independent two-event scenarios: intersections, unions, odds for and against.
Example values are shown — change any of them and the answer updates live.
Probability
16.67%
2 dice, sum exactly 7.
As odds1 : 5
Complement (not this)83.33%
Expected value7
Exact combinatorics — independent, fair dice/coins/events. No simulation noise.
At least vs exactly
Exactly your target
16.67%
Exactly
At least your target
16.67%
At least
Distribution
11 outcomes
Probability
Step 1 · Probability
favorable ÷ 6ⁿ
2 · k=7
16.67%
Step 2 · Complement (not this)
1 − P
16.67%
83.33%
Exact arithmetic — computed instantly in your browser.