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Price & margin · free · runs in your browser

Odds Converter

American, decimal, and fractional odds are three notations for the same price, and the bridge between them is implied probability: decimal odds = 1 ÷ implied probability, so −110 = 1.91 decimal = 10/11 = 52.4%.

American-110
Decimal1.909
Fractional10/11
Implied prob52.38%
Payout on $100.00$190.91Profit $90.91 · risk $100.00
Show the math
implied = 1 / decimal1 / 1.9091 = 52.38%
payout = stake × decimal$100.00 × 1.9091 = $190.91

The Scout’s Notebook

How do you convert betting odds?

American, decimal, and fractional odds are three notations for the same price, and the bridge between them is implied probability: decimal odds = 1 ÷ implied probability, so −110 = 1.91 decimal = 10/11 = 52.4%.

How it works & common questions

Implied probability is the number that matters: it is what the price says the outcome's chance is, before the book's margin is considered.

How it works

  1. Pick the input format. American, decimal, fractional, or an implied percentage.
  2. Enter the price and your stake. The other three formats, the implied probability, and the payout compute instantly.
  3. Read the implied probability. 1 ÷ decimal odds — the chance the price is charging you for.

What does −110 mean in betting odds?

−110 means you must risk $110 to win $100, which is 1.91 in decimal odds and a 52.38% implied probability. The extra 2.38 points over a coin flip is the sportsbook's margin on a standard two-sided market.

Dynatyze Betting is analytics and education for people 21 and over. It is not a sportsbook: no wager is ever placed on Dynatyze — the tools help you find and price the best available bet elsewhere. If gambling stops being fun, help is free and confidential at 1-800-GAMBLER.