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Crazy Ninja Odds

Free devig calculator plus +EV, arbitrage, promo-conversion and hedge tools

Odds screenEducation
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About Crazy Ninja Odds

Crazy Ninja Odds (also at crazyninjamike.com) is a free odds-comparison and betting-calculator site best known for its Devigger, which removes the vig from one or more legs using several methods (multiplicative, additive, power, Shin, worst-case and weighted average) to estimate fair odds, EV and Kelly stake, with payout presets for PrizePicks, Underdog and Thrive Fantasy entries. Its +EV, arbitrage, low-hold, free-bet, odds-boost and promo screens pull live odds from 25-plus sportsbooks and exchanges, including PrizePicks lines. It also has a hedge calculator and a Monte Carlo simulator, and support happens in its free Discord.

Features

  • Devigger with multiple devig methods
  • Kelly criterion stake sizing
  • Multi-leg and parlay EV evaluation
  • Arbitrage and low-hold finder
  • Free bet, odds boost and risk-free bet converters
  • Hedge calculator
  • Monte Carlo simulator

Sports and sites covered

Works with

  • PrizePicks
  • Underdog

Pricing

Free

All tools free; optional Whop supporter tiers ($5-$50/mo) add private Discord channels

Prices as listed on crazyninjaodds.com when we checked. Confirm current pricing on their site.

Compare Crazy Ninja Odds

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Sources and corrections

Last checked Oct 3, 2026. We build every listing from the sources below and recheck them regularly. If something about Crazy Ninja Odds has changed, let us know.