Bonus Bet Conversion Calculator
Retention percentage from a one-time play-through bonus.
Enter bonus amount, decimal odds, and whether stake returns on win (cash bonus vs free play style).
Bonus Bet Conversion Calculator
Adjust inputs to see updated results.
Table of Contents
How to Use This Calculator
Enter bonus amount and decimal odds for a one-time play-through where stake returns on wins like cash. The tool outputs expected cash value using win probability 1/d at the posted price.
Bonus dollars
Promotional funds you must wager once at listed odds.
Decimal odds
The side you will actually bet—often a −110 style favorite.
Cash-style return
This path credits profit and returns stake on wins—different from SNR free plays.
Compare to SNR
Use free bet conversion when stake is not returned.
Cash Bonus EV
EV ≈ bonus × (1/d) × d = bonus × (1/d) × (1 + profit multiple)
Implemented as expected return including returned stake on wins at probability 1/d—matching the on-page formula in code.
Examples
Example 1 — $50 at 2.00
Bonus 50, decimal 2.00. Win probability 50%; cash EV includes stake return → check live output (~$50 expected return components per implementation).
Example 2 — Compare SNR
Run the same numbers in free-bet mode to see how SNR lowers EV.
Example 3 — Odds sensitivity
Longer odds increase variance; EV moves with implied win rate.
Frequently Asked Questions
Yes—that is what differentiates this from SNR free bet math in the paired tool.
Convert to decimal first.
No—single bet assumption. Chain rollovers need spreadsheet modeling.
No—one trial can still bust the bonus.
Uses posted 1/d as win probability—swap in your fair prob for sharper EV.
