+EV calculator · Pro tier

Got a price on a book we don't carry?

Pick the event, paste your price, get an EV% computed against the same Pinnacle-anchored no-vig fair line our /ev page uses. Works for Caesars, Fanatics, BetUS, Hard Rock, bet365 — any sportsbook outside our coverage. Same math, your price.

Pro API key required

The calculator hits the same Pro-tier /ev/calc endpoint as the API. Paste your key — it's stored locally in your browser only. Don't have one yet? See pricing →

How the math works

For each event we pick a sharp anchor — Pinnacle if available, then Polymarket, Kalshi, or Bovada. We strip the anchor's vig and convert their two-sided price into a fair win probability. Your price gets evaluated against that probability: EV% = (fair_prob × decimal_payout) − 1. Positive numbers mean the book's payout is bigger than its true probability of paying.

Limits:the math only works for two-sided markets the anchor actually covers. Player props on Pinnacle are MLB-heavy; soccer 3-way h2h works; single-tier YES markets (e.g. “10+ strikeouts”) can't be no-vig fair-derived from themselves and aren't calculator-eligible.

API: GET /v1/sports/{sport}/events/{id}/ev/calc — same arguments as the form, returns the same shape.