Sports Betting Calculators
Free, professional-grade calculators to help you make smarter betting decisions. Calculate expected value, convert odds, manage your bankroll, and track performance.
Expected Value (EV) Calculator
Calculate if a bet has positive expected value based on true probability and odds
Odds Converter
Convert between American, Decimal, Fractional odds and Implied Probability
Bankroll Calculator
Determine proper unit sizes based on your bankroll and risk tolerance
Kelly Criterion Calculator
Calculate optimal bet sizing for maximum long-term bankroll growth
Parlay Calculator
Calculate parlay payouts and true win probability for multi-leg bets
Break-Even Calculator
Find the required win percentage to be profitable at given odds
ROI Performance Tracker
Track your betting record and calculate ROI, profit, and win rate over time
Why Use Our Calculators?
Professional tools used by serious sports bettors
Accurate Calculations
Industry-standard formulas used by professional bettors and sportsbooks
Easy to Use
Clean, intuitive interfaces with helpful tooltips and explanations
100% Free
No sign-up required, no limits, and completely free to use forever