Free Tool

Odds Calculator

Convert between American, decimal, and fractional odds. Calculate implied probability and potential payout. Enter any odds format below and the other formats update automatically.

Convert Odds

American Odds

Decimal Odds

Fractional Odds

Implied Probability (%)

Payout Calculator

Stake ($)

Profit ($)

$0.00

Total Return ($)

$0.00

How to Use the Odds Calculator

Type in any one of the four odds fields (American, decimal, fractional, or implied probability) and the other three will populate automatically. Update the stake field to see the profit and total return for your wager.

This calculator is most useful for:

Comparing odds across Ohio sportsbooks that display different formats
Quickly checking implied probability when assessing bet value
Calculating exact payouts before placing a wager
Understanding what "+200" or "5/2" actually means in real dollar terms

For a full explanation of how odds work, see our odds explained guide.