Calculators & Tools
Free quantitative tools for sports betting and prediction markets.
Kelly Criterion Calculator
Optimal bet size as a fraction of bankroll. Quarter-Kelly default for variance reduction.
Open →Expected Value Calculator
Long-run return per dollar wagered. Compare fair probability against book odds.
Open →Hedge Calculator
Lock in profit or eliminate loss after a price moves in your favor.
Open →Parlay Calculator
Combined odds across legs, with EV when fair probabilities are supplied.
Open →Arbitrage Calculator
Optimal stakes across two outcomes for guaranteed profit when prices diverge.
Open →Odds Format Converter
American, decimal, fractional, and implied probability — converted live.
Open →Closing Line Value Calculator
How much your entry odds beat the closing line. The strongest leading indicator of skill.
Open →Quarter / Half / Full Kelly Explainer
Why fractional Kelly. Bankroll-growth simulation across all three sizings.
Open →The calculators above are static tools. The Edge Finder runs them continuously across 40+ sportsbooks and surfaces every live +EV opportunity, every 60 seconds.