ARB CALCULATOR
Enter odds from different bookmakers. If an arbitrage exists, we'll show you exactly how much to bet on each side to guarantee a profit.
FREE TOOL
OUTCOMES
1
2
⚠️ Soccer / football? Add the 3rd outcome (Draw) above — a 2-outcome arb does NOT cover a draw result, and you will lose both bets if the match draws.
YOUR BANKROLL
A$
Enter odds above
Add decimal odds from 2 different bookmakers to check for an arbitrage opportunity.
EXAMPLE
Sportsbet2.10
TAB2.05
Total implied: 96.2% → ARB EXISTS ✓
HOW ARB BETTING WORKS
01
Find price discrepancy
Different bookmakers price the same event differently. When their combined implied probabilities add up to less than 100%, a profit opportunity exists.
02
Calculate optimal stakes
Divide your bankroll proportionally across each outcome so the return is equal regardless of which side wins. This calculator does the maths for you.
03
Place bets simultaneously
Speed matters — ARB windows close fast as bookmakers adjust their odds. Place both bets as quickly as possible, ideally within seconds of each other.
04
Collect your profit
Whichever outcome wins, your return minus your total stake is pure profit. Typical margins are 1–5% per arb. Small per-bet, but compounds quickly at scale.
WANT LIVE ARB ALERTS?
ARB//HQ scans 13 bookmakers automatically
Instead of hunting manually, ARB//HQ's live scanner finds these opportunities in real time — across all 13 AU bookmakers, 13 sports, refreshed every 15–30s near kick-off. Browser alerts when high-value arbs appear.
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