Betfinder Tool
Bet Calculator
Calculate returns, convert odds, check hedge stakes, and test staking ideas before placing a bet.
These tools estimate potential returns before taxes, fees, void legs, dead heats, cash-out rules, or sportsbook-specific settlement terms.
How to Use the Betfinder Betting Tools
The Betfinder betting tools help you calculate returns, convert odds, check implied probability, estimate hedge stakes, and test Kelly staking.
Start with the bet calculator if you want to check a single bet or a parlay. Use the odds converter if you just want to compare decimal, fractional, American, and implied probability formats.
Bet Calculator
Use the bet calculator to work out your potential return from a single bet or parlay.
Enter your unit stake, choose your odds format, then add the odds. If you’re checking a parlay or accumulator, add each leg separately and the calculator will combine the odds for you.
The bet calculator shows:
- Potential return
- Potential profit
- Decimal odds
- Fractional odds
- American odds
- Implied probability
This is useful when comparing sportsbook prices, checking parlay payouts, or seeing what a price really means before you bet.
Odds Converter
The odds converter tool converts odds between decimal, fractional, American, and implied probability formats.
For example, decimal odds of 2.00, fractional odds of 1/1, and American odds of +100 all imply a 50% chance before bookmaker margin.
This matters because different betting sites use different odds formats. Decimal odds are common in Europe, fractional odds are still widely used in the UK and Ireland, and American odds are standard on US sportsbooks.
Hedge Calculator
The hedge calculator estimates the stake needed on the opposite side of a bet.
This can be useful if your original bet has moved in your favor and you want to reduce risk before the event finishes. The free hedge bet calculator tool shows the suggested hedge stake, your original return, and the approximate outcome if either side wins.
Hedging can protect a position, but it can also reduce the value of a strong bet. Use it when the trade-off makes sense, not just because cashing out feels safer.
Kelly Calculator
The Kelly calculator estimates a stake based on your bankroll, the odds, and your own win probability.
Kelly staking is based on the edge. If your estimated chance is higher than the implied probability in the odds, the calculator suggests a stake. If there is no edge, the suggested stake will be zero.
Full Kelly can lead to big swings. Half Kelly or quarter Kelly is often easier to manage because it reduces stake size while still linking your bet size to perceived value.
What the Calculator Results Mean
Potential return is the total amount returned if the bet wins, including your original stake.
Potential profit is the amount won after your stake is removed.
Decimal odds show the total return for every 1 unit staked. Decimal odds of 3.00 mean a winning 1-unit bet returns 3 units in total.
Fractional odds show the profit compared with the stake. Fractional odds of 2/1 mean a winning 1-unit bet makes 2 units of profit.
American odds show either how much profit you make from a 100-unit stake, or how much you need to stake to win 100 units.
Implied probability shows the chance suggested by the odds. A bet only has value if you believe the true chance is higher than the implied probability.
Why Implied Probability Matters
Implied probability turns odds into a percentage. That makes prices easier to compare.
If odds imply a 40% chance, but you think the true chance is closer to 50%, the bet may offer value. If the odds imply 60% and your estimate is only 50%, the price may be too short.
This is the basic idea behind positive expected value betting. You’re not just trying to pick winners. You’re trying to find prices that are bigger than they should be.
Full Odds Conversion Lookup Chart
Use this odds conversion chart to compare common fractional odds, decimal odds, American odds, and implied probability.
The implied probability shown here is based on the raw odds before sportsbook margin.
| Fractional Odds | Decimal Odds | American Odds | Implied Probability |
|---|---|---|---|
| 1/100 | 1.01 | -10000 | 99.01% |
| 1/50 | 1.02 | -5000 | 98.04% |
| 1/33 | 1.03 | -3300 | 97.06% |
| 1/25 | 1.04 | -2500 | 96.15% |
| 1/20 | 1.05 | -2000 | 95.24% |
| 1/16 | 1.06 | -1600 | 94.12% |
| 1/14 | 1.07 | -1400 | 93.33% |
| 1/12 | 1.08 | -1200 | 92.31% |
| 1/10 | 1.10 | -1000 | 90.91% |
| 1/9 | 1.11 | -900 | 90.00% |
| 1/8 | 1.12 | -800 | 88.89% |
| 1/7 | 1.14 | -700 | 87.50% |
| 1/6 | 1.17 | -600 | 85.71% |
| 1/5 | 1.20 | -500 | 83.33% |
| 2/9 | 1.22 | -450 | 81.82% |
| 1/4 | 1.25 | -400 | 80.00% |
| 2/7 | 1.29 | -350 | 77.78% |
| 3/10 | 1.30 | -333 | 76.92% |
| 1/3 | 1.33 | -300 | 75.00% |
| 4/11 | 1.36 | -275 | 73.33% |
| 2/5 | 1.40 | -250 | 71.43% |
| 4/9 | 1.44 | -225 | 69.23% |
| 1/2 | 1.50 | -200 | 66.67% |
| 8/15 | 1.53 | -188 | 65.22% |
| 4/7 | 1.57 | -175 | 63.64% |
| 8/13 | 1.62 | -162 | 61.90% |
| 2/3 | 1.67 | -150 | 60.00% |
| 8/11 | 1.73 | -138 | 57.89% |
| 4/5 | 1.80 | -125 | 55.56% |
| 5/6 | 1.83 | -120 | 54.55% |
| 10/11 | 1.91 | -110 | 52.38% |
| 1/1 | 2.00 | +100 | 50.00% |
| 11/10 | 2.10 | +110 | 47.62% |
| 6/5 | 2.20 | +120 | 45.45% |
| 5/4 | 2.25 | +125 | 44.44% |
| 13/10 | 2.30 | +130 | 43.48% |
| 7/5 | 2.40 | +140 | 41.67% |
| 3/2 | 2.50 | +150 | 40.00% |
| 8/5 | 2.60 | +160 | 38.46% |
| 13/8 | 2.62 | +162 | 38.10% |
| 7/4 | 2.75 | +175 | 36.36% |
| 9/5 | 2.80 | +180 | 35.71% |
| 2/1 | 3.00 | +200 | 33.33% |
| 11/5 | 3.20 | +220 | 31.25% |
| 9/4 | 3.25 | +225 | 30.77% |
| 5/2 | 3.50 | +250 | 28.57% |
| 11/4 | 3.75 | +275 | 26.67% |
| 3/1 | 4.00 | +300 | 25.00% |
| 10/3 | 4.33 | +333 | 23.08% |
| 7/2 | 4.50 | +350 | 22.22% |
| 4/1 | 5.00 | +400 | 20.00% |
| 9/2 | 5.50 | +450 | 18.18% |
| 5/1 | 6.00 | +500 | 16.67% |
| 11/2 | 6.50 | +550 | 15.38% |
| 6/1 | 7.00 | +600 | 14.29% |
| 13/2 | 7.50 | +650 | 13.33% |
| 7/1 | 8.00 | +700 | 12.50% |
| 15/2 | 8.50 | +750 | 11.76% |
| 8/1 | 9.00 | +800 | 11.11% |
| 17/2 | 9.50 | +850 | 10.53% |
| 9/1 | 10.00 | +900 | 10.00% |
| 10/1 | 11.00 | +1000 | 9.09% |
| 12/1 | 13.00 | +1200 | 7.69% |
| 14/1 | 15.00 | +1400 | 6.67% |
| 16/1 | 17.00 | +1600 | 5.88% |
| 20/1 | 21.00 | +2000 | 4.76% |
| 25/1 | 26.00 | +2500 | 3.85% |
| 33/1 | 34.00 | +3300 | 2.94% |
| 40/1 | 41.00 | +4000 | 2.44% |
| 50/1 | 51.00 | +5000 | 1.96% |
| 66/1 | 67.00 | +6600 | 1.49% |
| 80/1 | 81.00 | +8000 | 1.23% |
| 100/1 | 101.00 | +10000 | 0.99% |