Tools
Run the math yourself.
Free, client-side sports-betting calculators: expected value, Kelly Criterion bet sizing, parlay payout, and closing line value. No login required.
EV Calculator
Compute expected value, ROI, and edge for a single bet given your probability estimate and the offered odds.
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Kelly Calculator
Find the bet size that maximizes long-run bankroll growth. Includes Half / Quarter / Tenth Kelly multipliers.
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Parlay Calculator
Combine 2-10 legs into parlay odds and payout. See how each additional leg compounds the house edge.
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CLV Calculator
Measure closing line value for spread/total or moneyline bets — the best predictor of long-term profitability.
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