Betting calculator
Matched Betting Calculator
Use this matched betting calculator to estimate the qualifying bet result, free bet lay stake, free bet profit and possible overall result.
Enter the qualifying bet and free bet
This calculator assumes a normal qualifying back bet and a stake-not-returned free bet.
Qualifying bet
Free bet
This offer produces an estimated overall result of about £22.60 after the qualifying result and free bet conversion.
What does a matched betting calculator do?
A matched betting calculator estimates the outcome of a bookmaker offer by combining a qualifying bet and a free bet. It calculates the lay stakes needed on an exchange and shows the estimated result after commission.
Matched betting calculations depend heavily on the offer terms. Minimum odds, qualifying rules, stake limits, expiry dates and market restrictions can all affect the real result.
How the calculation works
Qualifying lay stake = qualifying stake × back odds ÷ (lay odds − commission)
Free bet lay stake = free bet stake × (back odds − 1) ÷ (lay odds − commission)
Overall result = qualifying result + free bet result
Important matched betting risks
- Odds can move before the lay bet is matched.
- Exchange liquidity may not be enough at the required price.
- Free bet terms may require minimum odds or specific markets.
- Some free bets are stake not returned, while others work differently.
- Bookmakers can restrict accounts or exclude customers from promotions.
- Human error can turn a low-risk calculation into a loss.