Free Sports Betting Tools

Professional-grade betting calculators — completely free, no signup required. Convert odds, calculate parlays, and manage your bankroll like a pro.

Odds Calculator

Convert between American, decimal, and fractional odds. Calculate implied probability, payouts, and expected value.

American odds, decimal, fractional, implied probability, EV

Parlay Calculator

Calculate combined parlay odds, payouts, and implied probability for multi-leg bets. Supports 2-15 legs.

Parlay odds, multi-leg bets, combined payout, parlay strategy

Bankroll Management Calculator

Calculate optimal bet sizing with Kelly Criterion, expected value per bet, monthly projections, and risk of ruin.

Kelly Criterion, unit sizing, risk of ruin, bankroll strategy

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