Odds Calculator

Enter your stake and the odds in any format. See your payout, profit and the implied probability instantly.

Payout —
Profit —
Decimal odds —
Implied probability —

How the odds calculator works

The odds calculator is the most basic tool in any bettor's kit. You give it two things — your stake and the odds — and it tells you exactly what you stand to win. The math is one multiplication, but the calculator handles the format conversion for you so you do not have to translate between American, decimal and fractional in your head.

Example. You bet $50 on Manchester City at decimal odds of 1.45. Your payout is 50 × 1.45 = $72.50. Your profit is the payout minus the stake = $22.50. The implied probability is 1 ÷ 1.45 = 68.97%, meaning the sportsbook is pricing City as a heavy favorite.

American, decimal and fractional — which format is best?

None of them is "better" — they are just three ways of writing the same thing. American odds (+150, −200) are standard in U.S. sportsbooks. Decimal odds (2.50, 1.50) dominate Europe, Australia and most online books because the math is easier. Fractional odds (3/2, 1/2) are still used at UK racing tracks and on some legacy bookmaker apps.

Most professional bettors prefer decimal because the payout formula is just stake × odds. With American odds you have to remember whether the number is positive or negative and apply a different rule. Use whichever format your sportsbook displays, but understand all three.

What "implied probability" tells you

Every set of odds carries an implied probability — the percentage chance the market is assigning to that outcome. Decimal odds of 2.00 imply 50% (1 ÷ 2.00). Decimal odds of 1.20 imply 83.3%. Compare that to your own estimate of the true probability and you can spot value bets. If you think a team has a 60% chance to win and the implied probability of the odds is only 50%, you are getting a price worth taking.

Keep in mind: the implied probabilities in a market always add up to more than 100%. That extra slice is the bookmaker's margin, also called the vig or juice. Use the Hold Calculator to measure it.

Frequently asked questions

Multiply your stake by the decimal odds. For example, a $50 bet at decimal odds of 2.10 returns $105 ($55 in profit). If your odds are in American or fractional format, convert them to decimal first — or just use the calculator above, which handles all three formats automatically.
+150 is an underdog price. A $100 bet wins $150 in profit ($250 total payout). A positive number always tells you the profit on a $100 stake. Negative numbers (like −200) tell you how much you need to risk to win $100.
For decimal odds of 2.00 or higher: subtract 1 and multiply by 100. So 2.50 becomes +150. For decimal odds below 2.00: take negative 100 divided by (decimal − 1). So 1.50 becomes −200.
Implied probability is the percentage chance the odds suggest an outcome will happen. Calculated as 1 ÷ decimal odds × 100. Odds of 2.00 imply a 50% chance. Odds of 1.50 imply a 66.7% chance. It includes the bookmaker's margin, so the true probability is usually slightly lower.
No. Payout is what you receive back if your bet wins — including your original stake. Profit is just the winnings (payout minus stake). A $20 bet at 2.50 has a payout of $50 but a profit of $30.

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