Tools
Betting calculators.
The math Big Mike’s engine runs on every line, as free tools. No sign-up, no tracking of what you punch in.
Odds Converter
American to decimal to implied probability, instantly. The implied number is the one that matters: it's the win rate you need just to break even.
Parlay Calculator
Enter each leg, get the combined odds and payout. Then look at what the combined implied probability says about your chances.
EV Calculator
The only number that matters long-term. Enter the price and your true win probability; the calculator tells you who has the edge.
Kelly Calculator
How much to bet when you have an edge. Full Kelly maximizes long-run growth; almost everyone should bet a fraction of it.
Hedge Calculator
Your futures ticket is live and the other side is priced. This tells you the exact stake that locks the same profit whichever way it lands.
Hold Calculator
Enter both sides of a market and see the book's cut — plus what the fair, no-vig price would be. This is the math Big Mike runs on every line.
Closing Line Value
The result of one bet tells you almost nothing. The price you got against the price the market closed at tells you whether the bet was any good, before the ball is even thrown.
Get Big Mike
Big Mike runs this math on every line, then shows you the ones worth taking.
Get tomorrow’s 11am textFree for 7 days on the App StoreHis whole board live, your bets graded against the close, and the best number on every play. 61.4% on the moneyline board · 655 picks graded in public.