Matched Betting Calculator

Auto Mode

What is Matched Betting?

Use free bets from bookmakers to guarantee profit. Bet on the bookmaker, lay (bet against) on the exchange. You profit regardless of the outcome. This is 100% legal and tax-free in the UK.

💡 Auto Mode: Lay calculator automatically uses the calculated lay stake from the back calculator.

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BACK CALCULATOR

Back Bet Calculator

Bet Mode

Back Stake (£)

Back Odds (Decimal)

Lay Odds (Decimal)

Advanced Options (Optional)

Underlay (weight profit toward back bet winning)Overlay (weight profit toward lay bet winning)

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LAY CALCULATOR

Lay Bet Calculator

Lay Stake (£)

The amount you want to lay on the exchange

Lay Odds (Decimal)

Enter Market ID and Selection ID below, then click "Load Live" to fetch current Betfair odds

Load Live Odds from Betfair

Market ID

Selection ID

Back Odds (Decimal)

Exchange Commission (%)

Betfair: 2%, Smarkets: 2%, Matchbook: varies