Odds Converter Calculator

Move between American odds, probability, cents, decimal, and fractional formats while checking profit and payout.

Price formats

American oddsSportsbook format, such as -110 or +250Probability%The break-even chance of winningCents¢Prediction-market contract priceDecimal oddsTotal return for each $1 stakedFractional oddsProfit relative to stake, such as 10/11Your stake$Used for the payout preview

Return preview

Profit if you win

$90.91

Total payout

$190.91

Chance of winning

52.38%

Price per $1 return

$0.52

Percentage and cents represent the same implied chance. A 52.4¢ contract is a 52.4% price before fees.

How to use the Odds Converter

Use the odds converter to compare sportsbook prices and prediction-market contracts in the same format. Change any price field and every equivalent updates instantly.

1Enter a price in American odds, probability, cents, decimal, or fractional format.
2Read the equivalent prices in every other format.
3Add a stake to preview potential profit and total payout.

Formula and assumptions

Positive American odds: probability = 100 / (odds + 100). Negative odds: probability = |odds| / (|odds| + 100).

The probability shown is the break-even rate implied by the entered price. It does not remove sportsbook vig unless you start with fair odds.

Odds Converter calculator FAQ

Answers about this free odds converter calculator, sports betting odds, payouts, and the math behind each result.

What does +250 mean in probability?

+250 American odds imply a 28.57% break-even probability before adjusting for vig.

Are cents the same as probability?

A 40-cent contract is commonly read as roughly a 40% market probability, although fees and market structure can affect the true economics.