Arbitrage Calculator
Calculate guaranteed profits when sportsbooks disagree on odds.
1Outcome 1 (e.g., Team A wins)
2Outcome 2 (e.g., Team B wins)
Arbitrage Opportunity Found!
14.55% Arb
Guaranteed $170.21 profit (17.02% ROI)
Optimal Stake Distribution
Outcome 1
+150
$468.09
Pays $1170.21
Outcome 2
+120
$531.91
Pays $1170.21
Total Invested
$1000.00
Guaranteed Return
$1170.21
Profit
+$170.21
Example arb opportunity:
What is Arbitrage Betting?
Arbitrage (or "arbing") exploits price differences between sportsbooks. When books disagree on odds enough that the combined implied probability falls below 100%, you can bet both sides and guarantee profit regardless of outcome.
How Arbitrage Works
Example: Tennis match
Book A: Player 1 @ +150 (implied: 40%)
Book B: Player 2 @ +110 (implied: 47.6%)
Combined: 87.6% < 100% = Arb exists!
By betting the right amounts on each side, you lock in ~12% profit.
Arb Betting Considerations
- •Arbs are rare and close quickly—you need to act fast
- •Some books limit or ban accounts that consistently arb
- •Typical arbs are 1-5%—you need significant bankroll for meaningful profit
- •Watch for line movements between placing bets—one side could move
- •Left Hash surfaces arb opportunities automatically on the homepage
Related Tools
Find Arbs Automatically
Left Hash scans odds across all major sportsbooks and surfaces arbitrage opportunities in real-time.
View Live Arb Opportunities