A crypto sportsbook odds converter for Stake, BC.Game, Rollbit and the other books we review. Type into any odds box and the other formats update at once. Implied probability is the break-even rate inside that price, not the true chance of the result.
Formula appears here when you type a valid price.
18+ only. This is not a bet and not financial advice. A bookmaker price already includes margin. Implied probability across a full market adds up to more than 100%.
Ready to use these odds on a crypto sportsbook? Stake, BC.Game and Rollbit all run a full sportsbook next to their house originals, and every review on this site covers deposits, KYC and payout speed before you sign up.
How to use this odds converter
Pick the format on the ticket in front of you. Type that number. Read the other three boxes. Use stake if you want profit and total return for that price. Crypto sportsbooks such as Stake, BC.Game and Rollbit usually show decimal by default. US books show American. UK and Ireland still print fractional.
What the numbers mean
Decimal is total return per 1 staked, including the stake. 2.50 pays 2.50 back on a 1 stake if you win.
Fractional is profit only, written as a/b. 5/2 means profit of 5 on a stake of 2.
American (moneyline): plus is the profit on a 100 stake. Minus is how much you must stake to profit 100.
Implied probability is 1 divided by decimal, as a percent. It is the win rate you need for that price to break even before any other cost. It is not a forecast.
The formulas
Every conversion goes through decimal first.
Fractional a/b → decimal = (a ÷ b) + 1. Example: 5/2 → 2.50.
Positive American +N → decimal = (N ÷ 100) + 1. Example: +150 → 2.50.
Negative American −N → decimal = (100 ÷ N) + 1. Example: −200 → 1.50.
Decimal 2.00 or higher → American = (decimal − 1) × 100, shown with a plus. Even money is +100.
Decimal under 2.00 → American = −100 ÷ (decimal − 1). Example: 1.50 → −200.
Implied % = (1 ÷ decimal) × 100. Example: 2.50 → 40%.
Profit = stake × (decimal − 1). Total return = stake × decimal.
Worked example
A sportsbook shows 2.50. Stake 100.
- Decimal 2.50 means total return is 2.50 per 1 staked.
- Profit odds are 2.50 − 1 = 1.50, which reduces to 3/2. Some tickets print 6/4. Same price. This tool shows 3/2.
- American is +150.
- Implied probability is 1 ÷ 2.50 = 40%. That is the break-even win rate inside this one price, not a forecast.
- Profit if it wins: 100 × 1.50 = 150. Total return: 250.
If the ticket is 5/2, type 5 and 2 in the fractional boxes. You should see decimal 3.50, American +250, implied 28.57%.
5/2 is not 2.50.
Common odds
| Decimal | Fractional | American | Implied |
|---|---|---|---|
| 1.50 | 1/2 | -200 | 66.67% |
| 1.91 | 10/11 | -110 | 52.36% |
| 2.00 | 1/1 | +100 | 50.00% |
| 2.50 | 3/2 | +150 | 40.00% |
| 3.00 | 2/1 | +200 | 33.33% |
| 3.50 | 5/2 | +250 | 28.57% |
| 1.67 | 2/3 | -150 | 60.00% |
| 6.00 | 5/1 | +500 | 16.67% |
Odds converter FAQ
Does implied probability include the bookmaker margin?
Yes. Add the implied percentages on every outcome in one market and you get more than 100%. The extra is overround. This page does not strip that margin.
Why is even money +100 and not −100?
Decimal 2.00 is even money. The usual print is +100. Both +100 and −100 are the same price. This tool shows +100.
Can I use this for casino originals?
Only if the game shows a multiplier that behaves like decimal odds. Dice and limbo multipliers are not sportsbook odds. Use the dice and limbo calculators when those pages go live.
Is this a bet?
No. It converts a price. It does not place a wager and it is not financial advice. 18+ only.
How do I convert American odds to decimal?
Plus number: divide by 100, then add 1. +150 → 1.50 + 1 = 2.50. Minus number: drop the sign, divide 100 by that number, then add 1. −200 → 100 ÷ 200 + 1 = 1.50.
How do I convert fractional odds to decimal?
Divide the two numbers, then add 1. 5/2 → 2.50 + 1 = 3.50. Evens is 1/1 → 2.00.
What if I type 0 or leave a box empty?
Decimal must be greater than 1. Empty boxes do not place a bet. The tool just waits for a valid price.
Can I turn a converted price into a parlay?
Yes. Convert each leg to decimal first, then use the Parlay Calculator at /parlay-calculator.
More tools: /parlay-calculator, /bonus-wagering-calculator, /house-edge-calculator, /provably-fair-verifier. Sportsbooks we review: /casino/stake, /casino/bc-game, /casino/rollbit.
