Arbitrage Calculator
Two-way arb stake splitter. Enter opposing odds from two AU bookies and your total stake — see the guaranteed profit and ROI.
How the arbitrage calculator works
The calculator divides your total stake between two opposing outcomes priced at competing bookmakers. If 1/oddsA + 1/oddsB < 1, the combined implied probability is below 100% and an arb exists. Your stake is split so the payout is equal regardless of which side wins.
Example
Sportsbet has Home at 2.10, Ladbrokes has Away at 2.05. Combined implied probability is 1/2.10 + 1/2.05 = 96.4%. Stake $100 split ~49.4/50.6 returns ~$103.69 either way — a 3.7% locked-in profit.
Tips for AU bettors
- Verify bet limits before staking — small books cap winnings.
- Use bonus bets on one side when promo conditions allow.
- Track stakes and outcomes — bookies flag arb-only patterns quickly.
FAQ
- What is sports arbitrage betting?
Sports arbitrage (also known as a surebet or arb) is when two or more bookmakers price the same event so generously that you can back every outcome and lock in a guaranteed profit regardless of result.
- Is arbitrage betting legal in Australia?
Yes — arbitrage betting is legal in Australia. The risk is not legal, it is account restriction. AU corporate bookmakers (Sportsbet, Ladbrokes, Neds, etc.) may limit or close accounts they identify as arbing.
- How do I find arbitrage opportunities?
Manually you compare odds across multiple AU bookmakers and look for combined implied probability below 100%. Krok Odds automates this across 100+ bookmakers in real time.
- What ROI is normal for arbitrage bets?
Most legitimate arbitrage opportunities sit between 0.5% and 3% ROI. Anything above 5% is rare and usually indicates a stale line or a palpable bookmaker error (which may be voided).
Want this automated across 100+ bookmakers?
Krok Odds scans Sportsbet, TAB, Ladbrokes, Bet365, Neds, PointsBet AU and more — surfaces every arb, +EV, middle and low-hold in real time. 7-day Apex trial, card required.