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Free Bet &
Bonus Bet Calculator
A $100 bonus bet is worth about $65–$75 in cash when you convert it properly. Back it at high odds, then lay the same result at an exchange (bet against it there). You keep the difference whichever side wins. This calculator gives you the exact lay stake for your numbers.
Turn a bonus bet into cash you keep. Enter your bonus and the two prices. We show how much to lay at the exchange and what you keep, whatever the result.
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Lay this at the exchange
Lay stake—
Liability—
Profit if the bet wins—
Profit if the bet loses—
—
profit either way · — of your bet kept
Free bet conversion:
common questions
How does it work?
Place the bonus bet on a selection at a bookmaker, then lay the same selection at a betting exchange. The calculator finds the lay stake so your result is the same either way, converting a bonus bet, whose stake isn't returned, into cash you keep.
What is stake-not-returned (SNR)?
With a bonus/free bet the stake isn't returned. If it wins you keep only the profit. That changes the maths versus a normal cash (qualifying) bet, which the calculator handles automatically when you pick the bet type.
How much can I keep?
Usually 70–80% of the bonus as cash you keep, depending on the odds and commission. Higher odds generally mean you keep more. Your exact retention shows above. Books can limit or restrict this activity, so read the promo terms.
For information only, not financial advice. Bookmakers may restrict promotional activity — always read the terms. Once you're comfortable turning bonuses to cash, the
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