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Every odds format, one number.
American, decimal, implied probability: edit any field and the other two follow. What a price says about win probability, live.
Implied probability still includes the book's vig: it overstates how often the bet actually wins. To get the fair number, strip the vig with the no-vig calculator.
Think in percentages.
Odds formats are habits; probability is the substance. A bettor who sees -110 as “52.4%” instinctively asks the right question: does this hit more than 52.4% of the time? Not “is this a good line?” Every piece of Whet's math works in probabilities under the hood; the odds are just the wrapper the books put on them.
Common questions.
- How do American odds convert to implied probability?
- Negative odds: |odds| ÷ (|odds| + 100). Positive odds: 100 ÷ (odds + 100). So -110 implies 52.4% and +210 implies 32.3%. The converter runs these formulas live as you type.
- What's the difference between decimal and American odds?
- They say the same thing differently. Decimal odds are your total return per $1 staked (2.50 returns $2.50 including the stake). American odds quote profit relative to $100 (-110 risks $110 to win $100; +150 risks $100 to win $150).
- Is implied probability the real win probability?
- No. It includes the book's vig, so it overstates the true probability. Both sides of a market sum past 100%; the excess is the margin. De-vig the pair (see the no-vig calculator) to get the fair number.
The board runs the same math on every market, all day, and shows what clears the bar. Every pick graded in public.
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Now compare it to the fair price.
Converting is step one. The board does this on every bet, live, and shows only the ones that clear the bar.