Matched betting calculator
Back at a bookmaker, lay at an exchange — for qualifying and free bets.
Bet type
Betfair 5% · Smarkets 2%
= 3.000 decimal
= 3.100 decimal
- Lay stake at the exchange
- 9.84
- Liability (what the lay risks)
- 20.66
- If the bookmaker bet wins
- −0.66
- If the exchange lay wins
- −0.66
Keep the liability in your exchange account before laying. Bookmakers may limit accounts that only take offers.
How it works
Lay stake = back stake × back odds ÷ (lay odds − commission). For a free bet whose stake is not returned, use back odds − 1 instead.
Liability is what you risk at the exchange: lay stake × (lay odds − 1). Bookmakers may restrict accounts that only take offers.
For information only — the arithmetic, not a prediction. Vridhhi never places bets. Gambling may be restricted where you live; check your local law. 18+.