Convert favorable and total outcomes into a probability, expressed as a decimal, a percentage, and odds, plus the chance of the event not happening.
How it works
- Enter the number of favorable outcomes (e.g., 1 for a specific die roll).
- Enter the total possible outcomes (e.g., 6).
- Review the calculated probability and true odds ratio.
Frequently asked questions
Probability vs odds?
Probability is favorable / total (1/6 for a die roll); odds compare favorable to unfavorable (1:5).
What is the complement?
The probability an event does not happen: 1 minus the event probability. They always sum to 1.
How do I combine probabilities?
For independent events, multiply for "and", add (minus overlap) for "or". This tool covers single events.