Calculate a Surebet
Guaranteed return from a surebet using prices at different books.
How to Use This Calculator
- Enter your total investment
- Enter the best odds for each outcome from different bookmakers
- For 3-way markets (e.g., soccer), use all 3 default outcome fields
- Add or remove outcomes to match the market type
- If a surebet is live, get the optimal stake per 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?
A surebet (also called an arbitrage bet or arb) is when you can back every possible outcome of an event across different bookmakers and lock in a profit no matter the result, by exploiting gaps in the odds.
Is a surebet different from arbitrage?
Same concept, different label. Surebet is the go-to term in European markets, while arbitrage betting is the more technical American one. Both mean backing all outcomes across different bookmakers for a guaranteed profit.
What ROI can I realistically expect from surebets?
Most surebet opportunities land in the 1-5% ROI range. Bigger margins are rare and vanish fast. Even small percentages can pay off with larger stakes and high volume.
Can bookmakers ban me for surebetting?
Surebetting is legal, but bookmakers may limit or close accounts they suspect of it. Spreading across multiple accounts, varying your stake sizes, and blending surebets with regular bets can lower your detection risk.