How this tool works
The matched betting calculator is the UK offer-extraction tool: back at the bookie, lay at the exchange, and read lay stake plus both-way profit.
Qualifying bet and free bet
Commission is the exchange rate, usually 2% or 5%. Free-bet mode withholds the back stake.
Accepts fractional (5/2), decimal (3.50) and American (+250 / -110) odds.
How the lay stake is set
Qualifying bet: lay stake = (back stake × back odds) / (lay odds − commission). Free bet: replace back odds with (back odds − 1) because the token is not returned. A small negative on the qualifier is normal; the free bet is where the extract appears.
FAQ
Why is the qualifying bet slightly negative?
The exchange price is usually a bit shorter than the bookie, and commission takes a slice. That small cost buys the free bet.
What commission should I enter?
Use your exchange rate, commonly 5% or 2% with a discount.
Is matched betting risk-free?
It is low risk when the numbers are matched correctly, but selection voids, delays and account limits still exist.
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Important note
These calculators are for information only. Bookmaker rules, Rule 4, dead heats, each-way terms, maximum payouts and promotion conditions can change the real return. 18+ only. Please gamble responsibly.