Odds converter calculator
Move between American odds, probability, cents, decimal, and fractional formats while checking profit and payout.
$150
A $100 bet at +150 wins $150 and returns $250.
- Total payout
- $250.00
- Chance of winning
- 40.00%
- Price per $1 return
- $0.40
Type a price; every format and the payout follow.
How to use the odds converter calculator
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.
The math in full, with worked examples: Line shopping: why the best price matters
Questions
Answers about this free odds converter calculator, sports betting odds, payouts, and the math behind each result.
- +250 American odds imply a 28.57% break-even probability before adjusting for vig.
- A 40-cent contract is commonly read as roughly a 40% market probability, although fees and market structure can affect the true economics.