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Odds converter

Enter odds in any format and the other three fill in as you type.

%
Implied probability
52.38%
American−110
Profit on a $100 stake$90.91
Total return on $100$190.91

Odds converter FAQ

What do minus and plus odds mean?

Minus odds show what you stake to win $100: at −110 you stake $110 to win $100. Plus odds show what a $100 stake wins: at +150 you win $150.

What is implied probability?

It’s the win chance the odds represent, with the book’s margin included. It’s also the break-even point: at −110 you need to win 52.38% of the time to break even.

Why do both sides of a market add up to more than 100%?

The book builds its margin, the vig, into both prices. The no-vig calculator removes it and shows the fair odds for each side.

Why can’t American odds be between −100 and +100?

−100 and +100 both mean even money, 2.00 in decimal. Every price is either +100 or longer, or −100 or shorter, so values in between don’t exist.

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Every bet, already researched

EdgHouse is the research app for bettors who want to think for themselves.

Start 7-Day Free Trial
Download on the App StoreGet it on Google Play

No charge until day 8. Cancel anytime.

Every bet, already researched

EdgHouse is the research app for bettors who want to think for themselves.

Start 7-Day Free TrialDownload on the App StoreGet it on Google Play

No charge until day 8. Cancel anytime.

How it’s calculated

Every format describes the same price. Convert to decimal first, then to the others.

The formula

Plus odds to decimal
1 + odds ÷ 100
Minus odds to decimal
1 + 100 ÷ odds, without the minus sign
Implied probability
1 ÷ decimal
Fractional
decimal − 1, as a fraction

Worked example

  1. 1Start with −110. It’s a minus price, so divide 100 by 110.1 + 100 ÷ 110 = 1.909
  2. 2Implied probability1 ÷ 1.909 = 52.38%
  3. 3Fractional: 1.909 − 1 = 0.90910/11