EVERYDAY CLARITY
Complement Probability Calculator
Calculate the complement of a supplied event probability.
Your result
Probability event does not occur
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Event probability | Enter event probability using the definition in the method and example. |
Understanding your result
These outputs describe the probability model and event definitions you entered. A probability is a number from 0 to 1; a probability density is not itself the probability of one exact continuous value.
Common mistakes
- Entering 25 instead of 0.25 for a probability, or assuming events are independent when the model requires that assumption.
- Confusing an exact-count probability with a cumulative probability, or replacement with sampling without replacement.
Check your calculation
- Check a zero/certain-event boundary and the stated support of the distribution against the worked example.
Calculation checks, sources and review limits
What is the probability an event does not happen?
Calculate the complement of a supplied event probability.
Common uses
- What is the probability an event does not happen
How it works
complement = 1 - p
Worked example
Enter Event probability: 0.2 . Results: Probability event does not occur: 0.8 .