Free Betting Tools

Built for +EV Bettors

Every tool on this page is free. No account required. No upsell wall.

These calculators are built for bettors who approach sports betting as a math problem. Whether you're stripping vig to find true probabilities, building a correlated parlay, or checking whether a sportsbook line has moved against the market — the math has to be right. These tools do the math right.

No-Vig Calculator. Sportsbooks build margin into every line. The no-vig calculator removes that margin and shows you the true implied probability on both sides. Use it before placing any bet to confirm you're getting fair value.

Odds Converter. Switch between American (+150), decimal (2.50), and fractional (3/2) formats in one click. Useful when comparing lines across books that display odds differently.

Parlay Calculator. Enter each leg's odds and get the exact combined payout. Supports any number of legs. Shows both the payout multiplier and the true probability of hitting — so you know what you're actually risking.

Arbitrage Calculator. Enter odds from two or more books and see if a guaranteed profit exists. If the combined implied probability is under 100%, there's an arb. The calculator tells you exactly how much to stake on each side.

MLB Home Run Tracker. Live home run prop data updated throughout the season. See which players are trending, which lines are moving, and where the value is — before the books adjust.

Player Props Today. Today's player prop lines pulled from 48 sportsbooks. Scan the full market in one view. Updated every 2 minutes.

Prop Hit Rate Lookup. Historical hit rate data for player props. Know how often a player has hit a specific stat line before you bet it.

These tools are a free entry point into how Turtle +EV Labs thinks about betting. The full probability engine — sport-specific models, sharp money tracker, arb scanner, middles detector — is available to members.