Tools
Free tools.
Built right.
Interactive utilities for sports bettors and analytics teams. Each tool runs in the browser, requires no signup, and uses the same math we use internally.
Beta-Binomial CI Calculator
95% credible interval for any model win-rate or success-rate claim. Cite the lower bound, not the point estimate.
Open →Kelly Stake Calculator
Optimal bet sizing from bankroll, win probability, and odds. Full, half, or quarter Kelly.
Open →No-Vig Probability Converter
Strip the bookmaker's hold from any two-way market. Get fair probabilities and prices.
Open →CLV Calculator
Compare your bet price to the closing line. Compute raw and no-vig closing line value.
Open →Parlay True-Odds Calculator
Combined parlay payout, fair no-vig price, hold, and edge across up to 12 legs.
Open →Hold Percentage Calculator
Bookmaker hold and overround for two-way, three-way, and multi-way markets.
Open →