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Five small tools

The only tools you’ll need.

The calculators need no account. Create one only when you want either tracker to save progress across visits.

I
Most used
Matched betting calculator
Four inputs, one number: the exact amount to lay. Supports qualifying bets, SNR and SR free bets.
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II
Students
Student calculator
The same calculator, sized for a student bankroll — £5 stakes, small float, and the student loan & tax questions answered.
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III
Free
Offer tracker
Tick off offers and save your progress to a free BetBoffins account.
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IV
Handy
Odds converter
Decimal ↔ fractional ↔ American ↔ implied probability.
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V
Sign-up
Bet tracker
Logs every back and lay across all your bookmaker accounts, calculates running profit, and surfaces free-bet expiries before they lapse. Syncs across devices — sign-up needed.
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Public calculators
Use both calculators and the odds converter without an account.
Optional measurement
Usage measurement starts only after consent. Events contain no stake or balance values.
Saved trackers
A free account saves offer and bet tracker progress across visits.