Betting Tools

Free calculators to sharpen your edge

Every calculator below is free, runs in your browser with no signup, and can be embedded on your own site. Used by handicappers, analytics writers, and DFS players to validate odds, size bets, and find value across sportsbooks.

Popular tools

Popular2 tools
POPULAR

Odds Converter

Flip between American, decimal, and fractional instantly.

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Parlay Calculator

Compare parlay payouts and true probability.

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Odds & Value3 tools

Vig Calculator

See the sportsbook's margin on any market.

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EV Calculator

Check if a line is +EV given your true odds.

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Hold Calculator

Measure total hold on a full market.

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Strategy & Sizing3 tools

Kelly Criterion

Size your bets by your edge, not your gut.

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Hedge Calculator

Lock profit or cap downside on an open bet.

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Arbitrage Finder

Find risk-free splits across sportsbooks.

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Records & Combinations1 tool

Bankroll Tracker

Track wins, losses, and ROI over time.

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Free for everyone

Embed any calculator on your site

Drop our betting tools into your blog, forum, or community for free. No attribution required, but a link back is appreciated.

See embed guide

How these calculators work

  • Every formula is the same one professional traders use; we publish the inputs, not a black box.
  • Calculators run entirely in your browser — no data leaves your device, no signup is required.
  • Embed code is provided for every tool; attribution is appreciated but not technically required.
  • A calculator does not predict outcomes — it sizes them. Pair it with the AI picks for the edge component.