Calculate the exact lay stake needed on a betting exchange to guarantee profit from free bets, lock in profits from open positions, or minimise losses on qualifying bets.
| Outcome | Back Return | Lay P/L | Net Profit |
|---|---|---|---|
| Selection Wins | - | - | - |
| Selection Loses | - | - | - |
| Outcome | Back Return | Lay P/L | Net Profit |
|---|---|---|---|
| Selection Wins | - | - | - |
| Selection Loses | - | - | - |
| Outcome | Back Return | Lay P/L | Net Profit |
|---|---|---|---|
| Selection Wins | - | - | - |
| Selection Loses | - | - | - |
Select Free Bet Conversion for free bets, Back-to-Lay to lock in profits, or Qualifying Bet to find the cost of qualifying.
Input the back odds from your bookmaker, the lay odds from the exchange, your stake, and the exchange commission rate.
See the exact lay stake, your guaranteed profit or qualifying cost, and the outcome for every scenario in the results table.
Matched betting is one of the few risk-free ways to profit from sports betting. By placing opposing bets — a back bet at a bookmaker and a lay bet at an exchange — you can extract value from free bets, sign-up offers, and promotional deals with zero risk.
The key challenge is calculating the correct lay stake. Get it wrong and you either leave money on the table or expose yourself to unnecessary losses. This calculator does the maths for you, ensuring your lay stake perfectly hedges your position regardless of the outcome.
Free Bet Conversion is the most popular use case. When a bookmaker offers a free bet, this calculator shows you how to convert it into guaranteed cash. A good conversion rate is typically 70-80% of the free bet value, depending on the difference between back and lay odds.
See Also: After calculating your lay stake, check the Kelly Criterion Calculator to optimise your staking strategy long-term. For multi-selection hedging, our Dutching Calculator can split a stake across several outcomes.
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