Bonus Bet Calculator
Quantify the locked-in value of free and bonus bets and the optimal lay price.
How to Use This Calculator
- Choose the bonus type: Stake Not Returned (SNR) or Stake Returned (SR)
- Input the bonus/free bet amount
- Input the back odds from the bookmaker
- Input the lay odds from the betting exchange
- Input the exchange commission rate
- Read off the lay stake, guaranteed profit, and 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 converting a free bet or bonus bet into real cash by pairing opposing back and lay positions. The conversion rate quantifies what percentage of the bonus value you can lock in as guaranteed profit.
What conversion rate should I target?
SNR (Stake Not Returned) free bets typically convert at 60-80%. SR (Stake Returned) free bets can reach 80-95%. For SNR bets, higher odds generally yield stronger conversion rates.
Are higher or lower odds preferable?
On SNR free bets, higher odds (5.0+) deliver better conversion rates but demand greater lay liability. On SR free bets, odds have little effect on the conversion rate. Aim for an equilibrium between strong conversion and liability you can cover.
How do SNR and SR differ?
SNR (Stake Not Returned) means a winning free bet pays only the profit, not the stake. SR (Stake Returned) means you collect the full payout including the stake. SR bets carry more value and convert at a higher rate.