Betting Odds Calculator — Bet Payout and Profit

The betting odds calculator tells you what a single bet pays before you place it. It works with every odds format and in two directions:

1. Choose your odds format — American (-110, +150), decimal (1.91, 2.50) or fractional (10/11, 6/4). The choice is saved for all CalcVault betting calculators.
2. Pick a mode. I know my stake works out what a stake wins. I know what I want to win works out the stake you need for a target profit, the way US sportsbooks quote "risk $110 to win $100".
3. Enter the odds and the stake (or the amount to win).

The result shows:

• Total payout — what comes back if the bet wins, stake included;
• Profit — the "to win" figure, payout minus stake;
• Implied probability — the chance the price assumes, which is also your break-even win rate;
• the same odds in all three formats;
• a quick table of profit and payout for stakes from $10 to $1,000 at those odds.

Share results copies a link with the odds, mode and amount, so a friend or a betting forum sees exactly the same numbers.

Every format is first turned into decimal odds D, the total return per 1 staked:

• American, positive: D = A ÷ 100 + 1 · American, negative: D = 100 ÷ |A| + 1
• Fractional n/d: D = n ÷ d + 1

From the stake

• Payout = stake × D
• Profit = stake × (D − 1)

The same rules in American terms: at +A you win A for every 100 staked, and at −A you stake A to win 100.

From the amount to win

Stake = amount to win ÷ (D − 1), and the payout is the stake plus that amount. At -110, D − 1 = 0.909, so winning $100 takes a $110 stake.

Implied probability

Implied probability = 1 ÷ D × 100%. A bet only makes money in the long run if it wins more often than this. A sportsbook's prices include its margin, so the implied probabilities of all outcomes in a market add up to more than 100% — at -110 on both sides, 104.76%.

Favourites and underdogs

Odds shorter than evens (below 2.00, negative American, fractions under 1/1) mark a favourite: the profit is smaller than the stake and the implied probability is above 50%. Odds longer than evens mark an underdog: the profit is larger than the stake and the implied probability is below 50%. At exactly evens (2.00, +100, 1/1) the profit equals the stake.

Why a sportsbook may show a slightly different figure

Sportsbooks round payouts to the cent, and a price shown as 1.91 may really be -110 (1.909…), so a payout can differ from this calculator by a few cents. Larger gaps usually mean the price moved before the bet was accepted, a maximum payout limit applies, or a promotion such as a profit boost changed the odds — check the bet slip for the final price.

Example 1 — $110 on a -110 spread

• D = 100 ÷ 110 + 1 = 1.909
• Profit: $100.00 · Payout: $210.00
• Implied probability: 52.38% — you need to win more than 52.38% of -110 bets to come out ahead

Example 2 — $50 on a +240 underdog

• D = 240 ÷ 100 + 1 = 3.40
• Profit: $120.00 · Payout: $170.00
• Implied probability: 29.41%

Example 3 — £20 at 5/2

• D = 5 ÷ 2 + 1 = 3.50
• Profit: £50.00 · Return: £70.00
• Implied probability: 28.57%

The calculator labels amounts in dollars; the arithmetic is the same in any currency.

Example 4 — To win $100 at -150

• D − 1 = 100 ÷ 150 = 0.667
• Stake needed: $150.00 · Payout: $250.00
• Implied probability: 60.00%

Example 5 — $25 at decimal 1.80

• Profit: $20.00 · Payout: $45.00 · Implied probability: 55.56%

Next steps

To combine several picks into one ticket, use the Parlay Calculator. To check whether a price is worth taking at your own win estimate, use the Expected Value Calculator. To translate a price between formats without betting anything, use the Odds Converter.