Three calculators, free and instant — the same math we run on every game. Strip the vig to see a fair line, find the expected value and edge on any price, and size your bankroll like the math says, not like your gut says. Nothing here needs an account.
A sportsbook's two prices don't add up to 100% — the extra is the vig, the book's built-in margin. Remove it and you get the market's true implied odds. Enter both sides of a two-way market (moneyline, spread price, over/under price).
Use both prices from the same market — e.g. FanDuel has Yankees −120 and Red Sox +105.
Betting is about price vs. probability. Enter the odds you can get and your own estimate of the true win chance — we'll tell you the expected value, your edge over the price, and, if you add a bankroll, a conservative quarter-Kelly stake. Positive EV means the price is better than the true odds; that's the whole game.
Classic example: a coin flip is +100 fair. Getting +110 on a true 50% is a +5% edge.
The fastest way to lose is to bet too big. Set your bankroll and a unit size (pros run 1–3%, rarely over 5%), and we'll show your unit, a sane daily exposure cap, and how long a cold streak you can survive. This isn't advice — it's arithmetic.
Every day is independent — you're never "due." A unit you can lose 20 times in a row and still play is a unit you sized right.
The calculators are the manual version. The newsletter is the automatic one — every morning, the model's fair lines, the edges vs. the market, and the picks graded against the closing line. Free.