Free Betting Tools

Calculators and data tools we use internally — free for everyone. No signup, no email required. Everything on this page is built by the same team that ships the Turtle +EV picks platform across NBA, NHL, MLB, Soccer, and Tennis.

No-Vig Calculator

Most popular

Remove the sportsbook vig from any two-sided market to see true fair odds. Paste the over/under, get the Pinnacle-style no-vig price.

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Odds Converter

Convert American ↔ Decimal ↔ Fractional ↔ Implied probability. Instant, tap-to-copy, mobile-friendly.

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Parlay Calculator

Any number of legs, mixed odds formats. Combined odds, true implied probability, payout preview.

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Arbitrage Calculator

Two-way arbs across books. Tell it the two prices, it computes exact stake split and guaranteed profit.

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MLB Home Run Tracker

Live

Every MLB home run today, live as they happen. Distance, exit velo, launch angle, pitcher, inning. Sort any field.

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Player Props Today

A free preview of today's NBA / NHL / MLB / Soccer / Tennis player props with our modeled edge.

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Prop Hit Rate Lookup

Search any player. See their last 20 games against the line for points, rebounds, SOG, runs — whatever they post.

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Public Track Record

Transparency

100,000+ graded picks. Every one public. Sport-by-sport ROI. Find another service that does this.

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Built for +EV bettors

Every tool on this page is grounded in the same idea: find the difference between the price a sportsbook is offering and the true fair price. The no-vig calculator finds the fair price by stripping the sportsbook's margin. The odds converter lets you compare prices across formats (American, decimal, fractional). The arbitrage calculator spots when two books disagree enough to lock in guaranteed profit. The parlay calculator stops you from getting tricked by compounded vig.

Live data tools

The MLB home run tracker pulls live from the official MLB Stats API, with full Statcast metrics on every HR. Player props today gives a free preview of our live +EV board across NBA, NHL, MLB, Soccer, and Tennis. The prop hit rate lookup shows any player's last 20 graded games against the line.

When the tools aren't enough

Calculators help you verify a single bet. Finding +EV across 48 books × 5 sports × thousands of props per day is what the paid Turtle +EV picks platform does automatically. See the verified track record — every pick we've ever published is graded and public.

Guides & strategy

How to Calculate EV on Player Props
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How to Find Positive EV Props
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What Is Expected Value in Sports Betting?
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No-Vig Calculator — Complete Guide
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Arbitrage Betting Explained
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How to Calculate Parlay Odds
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MLB Home Run Prop Betting Guide
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Every +EV Prop Tool Compared (2026)
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Frequently asked questions

Are these betting tools really free?

Yes. No signup, no email, no rate limit. Turtle +EV Labs publishes free tools to help bettors learn the math behind +EV. The paid product is the picks platform that finds these edges automatically across 48 books.

Which tool should I start with?

If you are new to +EV betting, start with the Odds Converter to get fluent in formats, then the No-Vig Calculator to understand what fair odds actually are. From there, the Parlay and Arbitrage calculators make sense.

Do these tools work on mobile?

Yes — every tool is fully responsive and tested on iOS and Android browsers. No app to install.

Where do the live data feeds come from?

The MLB Home Run Tracker pulls from the official MLB Stats API. Player Props Today samples our live production feed of 100+ daily +EV picks. Prop Hit Rate Lookup queries our internal database of 100,000+ graded picks.

Will you add more tools?

Yes — next on the roadmap: Closing Line Value (CLV) calculator, Kelly stake calculator, and an NFL-specific prop research tool launching with the 2026 NFL season.

Want the edges our model actually finds?

Calculators are free. The Turtle +EV picks platform runs every prop through a sport-specific model and ranks the ones where the line is mispriced. NBA · NHL · MLB · Soccer · Tennis. 48 books.

See Today's +EV PicksMore Free ToolsSee Verified Results