Surebet Helper
Work out the guaranteed return from a surebet using odds at different bookmakers.
How to Use This Calculator
- Enter the total amount you want to invest
- Enter the best odds for each outcome from the different bookmakers
- For 3-way markets (soccer, for instance), use all 3 default outcome fields
- Add or remove outcomes to suit different market types
- If a surebet is there, you’ll see the ideal stake for each outcome and your guaranteed profit
Formula
Surebet Check: Sum of (1 / Odds) for all outcomes < 1
ROI = (1 / Sum of Inverses - 1) × 100%
Individual Stake = Total Investment × (1 / Odds_i) / Sum of Inverses
Guaranteed Profit = Total Investment / Sum of Inverses - Total Investment
Frequently Asked Questions
What is a surebet, in simple terms?
A surebet (also known as an arbitrage bet or arb) is a situation where you back every possible outcome of an event across different bookmakers and lock in a profit no matter what happens, by taking advantage of differences in the odds.
Is a surebet different from arbitrage?
Nope, they’re the same idea. Surebet is the term you’ll hear more in European markets, while arbitrage betting is the more technical, American label. Both mean backing all outcomes across different bookmakers for a guaranteed profit.
What kind of ROI can I expect from surebets?
Most surebet opportunities land around 1-5% ROI. Bigger margins are rare and tend to vanish fast. Even modest percentages can still be worthwhile when paired with larger investments and high volume.
Could a bookmaker ban me for surebetting?
Surebetting itself is legal, but bookmakers may limit or shut down accounts they suspect of it. Spreading bets across multiple accounts, varying your stake sizes, and mixing surebet activity in with regular bets can all help lower the chance of being spotted.