Betting calculators
Free football betting calculators: arbitrage stakes, expected value, implied probability, Kelly stakes, no-vig fair odds, bookmaker overround, dropping odds and closing line value. No sign-up, everything runs in your browser.
Arbitrage calculatorAn arbitrage is when the best prices for every outcome, taken at different bookmakers, add up to less than 100% implied probabilityExpected value (+ev) calculatorExpected value (EV) is the average profit or loss a bet makes per unit staked over the long runImplied probability calculatorImplied probability is the chance of an outcome that a price representsKelly criterion calculatorThe Kelly criterion sizes each bet as a share of your bankroll in proportion to your edgeNo-vig fair odds calculatorFair odds are the odds with the bookmaker margin (the vig) taken out. Add the implied probabilities of every outcome, then scale them back to 100%Overround calculator (bookmaker margin)The overround is how far a bookmaker’s implied probabilities add up above 100%Dropping odds calculatorDropping odds are prices that have shortened since the market openedClosing line value (clv) calculatorClosing line value (CLV) compares the odds you took with the final odds just before kick-off. Beating the closing line consistently is the strongest s
Pattern90 does these calculations for every football match, automatically. See today’s matches →
Updated 19 October 2026 · 18+ · Play responsibly · FAQ.