AISportsPlaysFree Sports Odds Calculators
Nine free, no-login tools for odds math — convert formats, build parlays, de-vig a market, hedge a position, check for arbitrage, run expected value, tease a line, build a round robin, or just track your own picks.
Odds Converter
Convert between American, decimal, and fractional odds, plus implied probability.
Parlay Calculator
Combine legs into one slip and see combined odds, payout, and probability.
De-Vig Calculator
Strip out the sportsbook's margin to see the true, fair probability of a market.
Hedge Calculator
Find the opposite-side stake that equalizes your result either way.
Arbitrage Calculator
Check two sportsbooks' odds for a risk-free split.
EV Calculator
See whether a pick is +EV or -EV given your own probability estimate.
Teaser Calculator
Move NFL or NBA spreads/totals by standard teaser points.
Round Robin Calculator
Generate every smaller parlay combination from a bigger pool of picks.
Free Bet Tracking Log
A simple, no-login log stored in your browser — record, profit/loss, and ROI.