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Sports Betting Odds Calculator

American — Decimal — Fractional. Instantly convert odds and calculate payouts.

Wager
Enter Odds
Profit —
Total Return (Profit + Stake) —
Implied Probability ? What is implied probability?

Implied probability is what the odds are actually telling you — the estimated likelihood of an outcome, expressed as a percentage.

Take -110 American odds: that implies a ~52.4% chance of winning. It's a fast way to gut-check whether a line matches what you actually think is going to happen.

The sharper your read on probability, the smarter your bets. Simple as that.

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Have you ever seen a betslip or sports betting odds board and been confused? Learning how to understand odds is a process and Hard Rock Bet Sportsbook is here to help.

Introducing our sports betting odds calculator – the easiest way to convert odds and calculate payouts across American, decimal odds, and fractional odds formats. No matter your preferred format, this tool seamlessly translates any wager while instantly showing potential payouts and implied probability.

Any stake, any odds.

Instructions: How to use the odds calculator tool

We built this sports betting odds calculator to be as simple as possible.

  • Step 1: Enter the hypothetical stake amount in the wager section of the tool. This could be $.50, $1, or $1,000,000+.
    • Optional: If you’re applying a profit boost, input the percentage in the provided box.
  • Step 2: Enter the odds of the bet. You can input the odds as American odds, decimal odds, or fractional odds.
  • Step 3: Check out the result. Whichever odds format you choose, the calculator will automatically display the equivalent price in the other formats, in addition to the wagers potential profit, total return, and the implied probability of the bet.

Odds calculator terminology

  • Stake Amount ($) – The amount of the bet.
  • Profit Boost (%) – Have a boost? Add the percentage to see how it will effect your payout.
  • American odds – These are expressed as either a positive number (ex. +150) or a negative number (ex. -120). Positive odds must be greater than +100, while negative odds are less than -100. When entering positive odds into the calculator, the (+) sign is optional.
  • Decimal odds – Decimal odds are written simply as a positive number greater than 1.
  • Fractional odds – Fractional odds are listed as, well, a fraction. For example, 10/1, 7/2, etc.
  • Profit: The amount of profit that a successful bet at the chosen stake and odds would return. This number excludes the amount of the wager (stake amount).
  • Total Return: The total amount of cash that the bet will pay out. This includes the original wager plus the profit.
  • Implied probability: The probability of a wager at the selected odds succeeding. Expressed as a percentage.