Free tools — no signup
The betting math, in the open.
The same calculations that power our value engine and verified track record — Kelly staking, devigging the line, expected value, closing line value. Free, instant, and no account required.
Kelly Criterion Calculator
Optimal stake size for your edge and bankroll.
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No-Vig / Devig Calculator
Strip the bookmaker margin to find fair odds.
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Expected Value (EV) Calculator
Is a bet +EV? Quantify your edge per stake.
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Closing Line Value (CLV) Calculator
Did you beat the closing line? The real skill metric.
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Odds Converter
Decimal, American, fractional + implied probability.
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Parlay Calculator
Combine legs into odds, payout and true probability.
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We don't just give you the calculator — we run the bets.
Bull Metrics scans 50+ bookmakers, devigs the sharp line, and flags bets priced better than they should be — then tracks every single one against the closing line so you can see, publicly, exactly how it performed. Wins and losses, nothing hidden.