Complement probability
Statistics / FREE CALCULATOR
Find the probability that an event does not occur.
Your answer starts here.
Enter your values and select Calculate to see the result and any available breakdown.
How to use this calculator
- Enter event probability. Use the unit shown beside the field.
- Select Calculate and review the result. Select Reset to restore the example inputs.
How the calculation works
1-Event probability
Worked example
Event probability = 0.3. Result: 0.7 probability.
Understand your result
Find the probability that an event does not occur. The result is expressed in probability.
Assumptions and limitations
Assumes the entered probability is valid for the event. Results are rounded for display.
Questions about this tool
What does this tool calculate?
Find the probability that an event does not occur.
What should I check before using the answer?
Assumes the entered probability is valid for the event.
Related guides
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