Arbitrage Calculator
Find arbitrage opportunities and calculate guaranteed profit
Arbitrage Calculator
Find guaranteed profit opportunities
Outcomes
Arbitrage Found!
Guaranteed profit opportunity
Stake Distribution
| Outcome | Sportsbook | Odds | Stake | Payout |
|---|---|---|---|---|
| Outcome 1 | Book A | +130 | $1,137 | |
| Outcome 2 | Book B | +125 | $1,137 | |
| Total | $1,000 | $1,137 | ||
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How Arbitrage Works
Understanding the mathematics
Arbitrage exists when the sum of implied probabilities across all outcomes is less than 100%. This creates a mathematical edge where betting all outcomes guarantees profit.
Quick Answer
Key concepts at a glance
Arbitrage exists when total implied probability < 100%. For 2-way: if odds are 2.10 and 2.10, implied = 47.6% + 47.6% = 95.2%. Since < 100%, a $1000 stake split proportionally guarantees profit. Formula: Stake = (Total × (1/Odds)) / Sum(1/Odds).
Key Facts About Arbitrage Betting
Important concepts to understand
- Arbitrage (arbing) guarantees profit regardless of the outcome
- Arb opportunities exist when sportsbook odds collectively imply <100% probability
- Typical arb margins are 1-5% - large margins are rare and close quickly
- Stakes must be placed at all involved sportsbooks simultaneously
- Many sportsbooks limit or ban accounts suspected of arbitrage betting
- Arb opportunities often last only minutes before odds adjust
- Line movement, bet limits, and execution timing are the main risks
- Professional arbers use software to scan thousands of markets in real-time
Frequently Asked Questions
Common questions about arbitrage betting
What is sports betting arbitrage?
Arbitrage betting (arbing) exploits differences in odds between sportsbooks to guarantee profit. By betting on all possible outcomes at different books, you can lock in a positive return regardless of result. It requires odds that collectively imply less than 100% probability.
How do I find arbitrage opportunities?
Compare odds across multiple sportsbooks for the same event. Calculate total implied probability - if it's under 100%, an arb exists. Professional arbers use scanning software like OddsJam, RebelBetting, or BetBurger. Manual arbing is slow and opportunities disappear quickly.
Why do sportsbooks limit arbers?
Arbing extracts guaranteed profit from sportsbooks without risk. Books identify arbers through betting patterns: always taking the best price, betting on unpopular markets, unusual stake sizes, and betting immediately when odds move. Most sharp books will limit winning accounts.
Is arbitrage betting legal?
Yes, arbitrage betting is legal in most jurisdictions. It's not illegal to place bets at multiple sportsbooks or to shop for the best odds. However, sportsbooks can refuse service or limit accounts, and their terms of service may prohibit bonus abuse related to arbing.
What is three-way arbitrage?
Three-way arbitrage applies to markets with three outcomes (e.g., soccer: home win, draw, away win). The same principle applies - if total implied probability is under 100%, you can bet all three outcomes proportionally for guaranteed profit. Three-way arbs are less common but can have larger margins.
What are the risks of arbitrage betting?
Main risks include: 1) Odds changing before all bets are placed, 2) Bet limits preventing full stake, 3) Account restrictions/bans, 4) Errors in calculating stakes, 5) Voided bets (canceled games, etc.). Execution speed and accuracy are critical.