Free tool

Bonus bet calculator

Turn bookie bonus bets into cash. Enter your odds and the calculator shows exactly what to bet on the other side, and what you'll get back whichever way it lands.

Your bets

Bonus bet amount

Back odds

Lay odds

Exchange commission

Check your exchange's commission rate for the market you're betting on.

Guaranteed return

$0.00

0% conversion

What to do

Getting the most out of it

Bonus bets: go for higher odds. The stake isn't returned, so longer odds usually convert a bigger share. Around $4–$8 tends to be the sweet spot.
Keep the gap small. The closer the back and lay (or both bookie) odds are, the less you lose. Check the odds right before you place both bets.
Place both bets back to back. Odds move fast. If one side changes, put the new odds in and re-check before you place the second bet.
Back / back needs two outcomes only. Use it for markets like head-to-head or line betting, with the two sides at different bookies.

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