Bonus Bet Betting Tool
Establish the guaranteed value of free and bonus bets and the optimal lay price.
How to Use This Calculator
- Choose the bonus category: Stake Not Returned (SNR) or Stake Returned (SR)
- Enter the value of the bonus or free bet
- Enter the back odds offered by the bookmaker
- Enter the lay odds available at the betting exchange
- Enter the commission rate charged by the exchange
- The calculator displays the lay stake, the guaranteed profit, and the conversion rate
Formula
SNR Lay Stake = Bet Amount × (Back Odds - 1) / (Lay Odds - Commission Rate)
SR Lay Stake = Bet Amount × Back Odds / (Lay Odds - Commission Rate)
Guaranteed Profit = min(Back Profit, Lay Profit)
Conversion Rate = (Guaranteed Profit / Bet Amount) × 100%
Frequently Asked Questions
What does bonus bet conversion mean?
Bonus bet conversion is the method of transforming a free or bonus bet into real money by pairing an opposing back bet and lay bet. The resulting conversion rate indicates what share of the bonus’s face value you can secure as guaranteed profit.
What counts as a strong conversion rate?
With SNR (Stake Not Returned) free bets, a conversion rate in the region of 60-80% is typical. With SR (Stake Returned) free bets, rates between 80-95% are within reach. As a rule, higher odds tend to yield stronger conversion rates on SNR bets.
Am I better off with higher or lower odds?
On SNR free bets, higher odds of 5.0 or more deliver better conversion rates but call for a larger lay liability. On SR free bets, the odds have little bearing on the conversion rate. The goal is to strike a balance between a good conversion and a liability you can comfortably handle.
How do SNR and SR differ?
SNR (Stake Not Returned) means a winning free bet pays you only the profit, with the stake withheld. SR (Stake Returned) means you collect the entire payout, stake included. SR bets carry greater value and convert at a higher rate.