At Least One Success
The complement of no successes gives the chance of at least one success. This is often easier than adding probabilities for every possible positive count.
At Least One Success
Probability · 2 inputs
How to use this calculator
- Enter success probability in 0–1.
- Enter independent trials in count.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Choose the reference quantity before interpreting the number. A ratio, a percentage and a percentage-point difference may use the same observations while answering different questions. For recorded data, keep the original values beside the summary so an unexpected result can be traced back to its inputs.
Each trial must share the same probability and be independent of the other trials.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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