The betting math, in the open.
Six free tools that run the same odds math as Whet's scanner — no login, no card. Grade a bet, check your closing line value, strip the vig, convert odds, size a stake, price a hedge.
Interactive tools
Grade My Bet
Paste any prop and get a 0-100 score against the live market across 25+ books.
Open the toolCLV Checker
Did your price beat the closing line? Look it up against the scanner's ledger.
Open the toolNo-Vig Calculator
Strip the vig from any two-way price — four de-vig methods, side by side.
Open the toolOdds Converter
American, decimal, and implied probability — live two-way conversion.
Open the toolKelly Calculator
Turn a win probability, odds, and bankroll into a suggested stake.
Open the toolHedge Calculator
How much to bet the other side, and what you keep either way.
Open the toolConcept guides
The ideas behind the tools — plain-English explainers, no calculator required.
Positive EV
What +EV actually means and how the scanner finds it.
Arbitrage
Two-sided price gaps and why they're rarer than ads claim.
Middles
Betting both sides of a moved line for a window where both win.
Parlays
How legs compound — the math the slip doesn't show you.
The receipts
The same math, graded in public against real outcomes.
Common questions.
- Are these tools really free?
- Yes. No account, no card, no trial clock. The calculators run entirely in your browser; the bet grader and CLV checker call the same engine the paid scanner uses, rate-limited so they stay free for everyone.
- Is this the same math as the paid product?
- Yes — the de-vig methods, odds conversions, and Kelly sizing here are ports of the exact engine code that scans ~300 props a day. The paid product adds the live feed: which book, which price, right now.
- Do the tools tell me what to bet?
- No. They tell you what the market implies and what the math says about a price. That's information, not betting advice — no probability makes a bet a sure thing.
Want the math run for you?
The tools are manual. The scanner runs the same math on ~300 props a day across 25+ books and surfaces what clears the bar.