The board's arithmetic, by hand.
The same math Sooth runs on every price, as calculators. Nothing here predicts anything — it converts, strips margin (the book's cut, also called vig or hold), and shows what the numbers already say.
No-vig fair price
Enter both sides of a two-way market from one book. The vig (the book's built-in margin) is removed by normalising the implied probabilities, giving you the price the book thinks is actually fair.
Odds converter
Type any one of the three formats; the others fill in automatically. Implied probability includes the vig — it is what the price charges, not the true chance of winning.
CLV checker — NFL moneylines
Did your bet beat the closing line (the final price just before kickoff, the sharpest read of the market)? Pick a game, enter the price you got, and compare it against the consensus close across every book we hold for it.
Hold (the book's cut)
Enter both sides of a market at one book. Hold is the margin baked into the pair — what the book keeps on average if it balances its action. Lower hold is better for you. Compare books before you bet.