# Odds Calculator

> Convert probability to odds for and against, or convert entered odds to probability.

Page: https://askcalculators.com/calculator/odds-calculator/
Definition: https://askcalculators.com/calculator/odds-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/odds-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/odds-calculator/?mode=oddsFor&a=3&b=2&probability=60

## Inputs
- mode: Input type; type=select; required; default=oddsFor; values=oddsFor|oddsAgainst|probability
- a: A; type=number; required; default=3; min=0
- b: B; type=number; required; default=2; min=0
- probability: Probability of winning (%); type=number; required; default=60; min=0; max=100

## Outputs
- winProbability: Winning probability; format=percent; primary
- loseProbability: Losing probability; format=percent
- oddsFor: Odds for; format=text
- oddsAgainst: Odds against; format=text

## Formula
for odds A:B, probability = A ÷ (A + B); odds against interchange success and failure

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.