Odds Calculator
Calculate odds in favor, odds against, probability, percentage, and simplified ratios from favorable and unfavorable outcomes.
Odds in favor = favorable : unfavorable
Probability = favorable / (favorable + unfavorable)
| Metric | Value |
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Privacy: calculations run locally in your browser. No inputs are stored or transmitted.
How it works
This tool converts counts into:
odds in favor, odds against, and probability.
If favorable = 3 and unfavorable = 7:
odds in favor = 3:7
probability = 3 / (3 + 7) = 0.3
Examples
- 3 favorable, 7 unfavorable → probability = 0.3
- 1 favorable, 1 unfavorable → probability = 0.5
- 0 favorable, 5 unfavorable → probability = 0
FAQ
- What are odds in favor?
Odds in favor compare favorable outcomes to unfavorable outcomes, usually written as a:b.
- What is the difference between odds and probability?
Probability is favorable outcomes divided by total outcomes, while odds compare favorable outcomes directly to unfavorable outcomes.
- Can both favorable and unfavorable outcomes be zero?
No. At least one of them must be greater than zero, otherwise odds and probability are undefined.
- Are calculations stored?
No. Everything runs locally in your browser.