Matched Betting Calculator

Calculate your exact lay stake, qualifying loss, and free bet profit for any bookmaker offer. Supports normal bets, SNR and SR free bets.

Bookmaker

Back Bet

Back Stake Amount you're betting

Back Odds Decimal odds at bookmaker

Use our Odds Converter

Betting Exchange

Lay Bet

Lay Odds Decimal odds on exchange

Commission 2% by default. Adjust if needed.

⚠️ Please fill in all fields with valid values.

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Your Results

Lay Stake

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Place this amount on the exchange

Lay Liability

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Exchange funds required

Qualifying Loss

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Cost to unlock free bet

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How to Use This Calculator

1. Choose your bet type

Select Normal for qualifying bets, SNR if your free bet stake isn't returned on a win, or SR if it is. Most bookmaker free bets are SNR.

2. Enter back stake & odds

Your back stake is the amount you're betting at the bookmaker. Back odds are the decimal odds shown — convert fractional odds by dividing and adding 1 (e.g. 2/1 = 3.00).

3. Enter lay odds & commission

Lay odds are the price shown on Betfair or Smarkets for the same selection. Commission is 2% by default — adjust if yours differs.

4. Read your results

The calculator gives you the exact lay stake to place on the exchange, your liability needed, and your guaranteed profit or qualifying loss.