Surebet Calculator

Surebet Calculator (Arbitrage)

Surebet Detected

Arbitrage Percentage: —

Guaranteed Profit: —

Outcome Odds Stake ($) Return if Wins ($)

Tip: Enter the best available odds from different bookmakers. Higher arb % = better opportunity.

What is a Surebet (Arbitrage Betting)?

A surebet (also called arbitrage betting) happens when you find odds from different bookmakers that allow you to bet on all possible outcomes of an event and lock in a guaranteed profit—no matter what happens.

The idea is simple: if the combined implied probability of the best odds for each outcome is below 100%, an arbitrage exists. Your job is to split your stakes correctly so the payout is balanced.

How Does Our Free Surebet Calculator Work?

This tool calculates the arbitrage percentage and the exact stakes you should place on each outcome to secure a fixed return. It works for: 2-way markets (e.g., Tennis Winner) and 3-way markets (e.g., Soccer 1X2).

  1. Enter the best odds you found for each outcome (from different books).
  2. Input your total stake (your total investment).
  3. Click Calculate Surebet.
  4. See the arbitrage % (if it’s under 100%, it’s a surebet).
  5. Get the stake distribution for each outcome + estimated profit.

Example (2 outcomes): If odds are 2.10 and 2.05, the implied probability can drop below 100%, creating a small but guaranteed edge when stakes are split correctly.

Surebet Formula (Simple Explanation)

A surebet exists when the sum of implied probabilities is less than 1:

Arb % = (1/Odds1) + (1/Odds2) (+ 1/Odds3)

If Arb % < 1 (or < 100%), you have an arbitrage opportunity.

Then the calculator splits your total stake so each outcome returns (almost) the same payout, making profit consistent.

Why Use This Surebet Calculator?

  • Instantly checks if odds create a real arbitrage.
  • Calculates exact stake sizing for 2-way and 3-way markets.
  • Shows expected profit and ROI in seconds.
  • Mobile-friendly, fast, and beginner-friendly.

Important: Surebets can be limited by bookmakers (stake limits, account restrictions, odds changes). Always double-check odds before placing the second bet.

Common Surebet Mistakes (Avoid These)

  • Odds moving while you place the second bet (kills the arb).
  • Not accounting for commission (exchanges) or fees.
  • Different rules across bookmakers (void policy, overtime rules, settlement).
  • Currency/withdrawal costs reducing your real ROI.
  • Stake limits preventing the required sizing.

Important Disclaimer

This Surebet calculator is for educational and entertainment purposes only. We do not offer gambling services, odds, or betting advice. Gambling involves financial risk and can be addictive. Bet only what you can afford to lose and seek help if needed (resources: gamblingtherapy.org). You must be 18+ or the legal age in your country.

Frequently Asked Questions

What is a surebet in sports betting? +
A surebet (arbitrage) is when you use the best odds from different bookmakers to cover all outcomes and secure a guaranteed profit, as long as the combined implied probability is below 100%.
How do I know if it’s a real arbitrage? +
Calculate the implied probability sum: (1/odds1) + (1/odds2) (+ 1/odds3). If the result is below 1 (below 100%), it’s an arbitrage opportunity.
Does this calculator work for 3-way markets like 1X2? +
Yes. Enter odds for Home/Draw/Away (or any 3 outcomes). The calculator will compute the arbitrage % and split stakes across all three outcomes.
Why does my profit change when odds move? +
Surebets depend on specific prices. If one odd drops even slightly, the implied probability sum may go above 100% and the guaranteed profit disappears or turns into a loss.
Is arbitrage betting risk-free? +
Mathematically it can be “guaranteed”, but in practice there are risks: odds changes, stake limits, void rules, delays, and account restrictions. Always verify terms and place bets quickly.