Free Sports Betting Tools
Professional-grade betting calculators. No signup, no ads, completely free.
Parlay Calculator
Add up to 12 parlay legs. Instantly calculates total odds, potential payout, profit, and combined win probability. The most-used tool on this site.
✓ Up to 12 legs✓ Real-time calculation✓ Win probability✓ Leg-by-leg breakdown
Odds Converter
Convert between American (+150), Decimal (2.50), and Fractional (3/2) odds instantly. Includes implied probability and a full reference table of common odds.
✓ All 3 formats✓ Implied probability✓ Reference table✓ Instant conversion
Betting Calculator
Enter your stake and odds to see exact potential payout and profit. Supports American, Decimal, and Fractional odds. Simple and fast.
✓ All odds formats✓ Payout & profit✓ Implied probability✓ Instant results
EV Calculator
Calculate the expected value of any bet. Input your estimated win probability and the sportsbook's odds to see if you have a mathematical edge (+EV or -EV).
✓ EV calculation✓ Edge percentage✓ +EV / -EV verdict✓ Long-term projections