Calculate Bonus Bet Value
Locked-in value of free and bonus bets, plus the optimal lay price.
How to Use This Calculator
- Pick the bonus type: Stake Not Returned (SNR) or Stake Returned (SR)
- Enter the bonus/free bet amount
- Drop in the back odds from the bookmaker
- Drop in the lay odds from the betting exchange
- Set the exchange commission rate
- Instantly see the lay stake, locked-in 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 is bonus bet conversion?
Bonus bet conversion is how you flip a free bet or bonus bet into real cash by pairing an opposing back and lay bet. The conversion rate shows what slice of the bonus value you can pull out as guaranteed profit.
What counts as a good conversion rate?
With SNR (Stake Not Returned) free bets, expect a typical conversion rate of 60-80%. With SR (Stake Returned) free bets, you can hit 80-95%. Higher odds usually push the conversion rate up on SNR bets.
Should I go higher or lower on odds?
For SNR free bets, higher odds (5.0+) lift your conversion rate but demand a bigger lay liability. For SR free bets, odds barely move the conversion rate. Aim for the sweet spot between strong conversion and liability you can handle.
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, stake included. SR bets carry more value and convert at a higher rate.