ABS · SBA, read backwards
Academy of
Betting Sports
Sports Betting Arbitrage, flipped, is the Academy of Betting Sports. It's where you learn the whole method. The calculators are free now; when the practice book opens, you'll work cards on demo money before real money goes behind them.
Free tools · no signup
Work the card yourself
Put in the two prices and your total. If it's an arb, you get the split; if it isn't, you see what the books are taking.
Two lines with a window between them. Outside the window one ticket wins and one loses; inside it, both win. Here's what that costs and what it pays.
Any format in, every format out, plus the win probability the price implies.
Each time your bankroll goes out and comes back, the next play is a little bigger. That's why a smaller edge you can repeat often can beat a bigger one you rarely see.
Arithmetic, not a forecast. It assumes every turn lands at that rate and all of it goes back out. Real boards vary day to day, bets get rejected, and books limit stakes.
The curriculum
Ten modules, in the order you'll need them
- The vigWhy −110 means 52.4%, and why the book wins before kickoff.
- Sure betsTwo books, one split, both outcomes paid. Reading a card.
- Value and double valueThe split is a choice. Floor versus ceiling on the same card.
- MiddlesCost, payout and the break-even hit rate that actually decides them.
- Power plays and parlaysWhy stacked favorites stop being safe, and how to price a ticket honestly.
- Bonus conversionTurning free bets into cash, and when a conversion isn't worth it.
- "They limited me"Rebuilding a play around a book's cap without leaving money exposed on the open side.
- One leg downRide it, hedge it, or hedge to break even — and what each costs.
- Money stuck at a bookHow OFFRAMP brings it home, what a move costs, and why capacity matters.
- Bankroll and compoundingHow many times your money goes out and comes back matters more than its size.
The practice book
A practice sportsbook. Demo money only.
Deposit, bet both sides, settle and withdraw to a practice bank — with demo money that can't be cashed out — so the first time you work a card with real money isn't the first time you've worked a card.
Join the SBA Discord to hear when the practice book opens.