tools
Calculators
Free, fast tools for unit sizing, parlays, EV, hedging, and more
How to use
Pick a calculator below, click Learn more to explore that calculator
Odds Converter
Convert American ↔ Decimal and see implied probability instantly.
Great for quick sanity checks before you place a bet.
Unit Size
Calculate 1u based on bankroll + unit percentage.
Keeps bet sizing consistent and protects you from variance.
Parlay Builder
Add legs and get combined odds + payout.
Useful for quickly checking payout + implied probability.
Kelly Criterion
Estimate sizing from your edge using fractional Kelly.
Strong tool — but keep it fractional to manage variance.
No-Vig Odds
Remove vig from a 2-way market and estimate fair odds.
Helps identify books shading one side too far.
Hedge Calculator
Find hedge stake to equalize profit across outcomes.
Great for live spots and protecting a big position.
EV (Expected Value)
Estimate EV + ROI based on odds and your probability.
Helps you stop betting “vibes” and start betting edges.