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THE BETTOR'S TOOLKIT

American & Decimal
Odds Converter

Convert decimal to American odds or American to decimal odds instantly.
Free, no sign-in, with implied probability included.

01 / CONVERSION

Odds converter

INSTANT

Type in either field. We'll handle the other.

Positive for underdogs. Negative for favorites.
Total return for every $1 wagered.

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IMPLIED PROBABILITY52.38%

The break-even win rate implied by these odds.

THE MATH, MADE SIMPLE

American vs. decimal odds

American odds, also called moneyline or US odds, show your profit on a $100 bet when positive, or the stake needed to win $100 when negative. Decimal odds show your total return per $1 staked, including your original stake.

At −110, a $110 bet wins $100 profit. That's 1.9091 in decimal odds.

Odds conversion chart

Common American to decimal odds conversions and implied probabilities
AmericanDecimalImplied probability
−5001.200083.33%
−3001.333375.00%
−2001.500066.67%
−1501.666760.00%
−1101.909152.38%
+1002.000050.00%
+1502.500040.00%
+2003.000033.33%
+3004.000025.00%
+5006.000016.67%

Decimal odds are rounded to four places; percentages to two.

START WITH THE ODDS YOU HAVE

How to use the odds converter

  1. Enter a price in the American odds or decimal odds field above.
  2. Read the equivalent odds and implied probability. Results update as you type.
  3. Use a quick pick for a common price, or copy a result for later.
DECIMAL → MONEYLINE

How to convert decimal to American odds

Use one of two formulas depending on whether the decimal price is at least 2.00.

Decimal odds of 2.00 or higher

American = (decimal − 1) × 100

For 2.50: (2.50 − 1) × 100 = +150. A $100 winning bet returns $250 in total: $150 profit plus your $100 stake.

Decimal odds between 1.00 and 2.00

American = −100 ÷ (decimal − 1)

For 1.50: −100 ÷ (1.50 − 1) = −200. You risk $200 to win $100 profit.

Convert decimal odds ↑
MONEYLINE → DECIMAL

How to convert American to decimal odds

The formula depends on whether the American odds have a plus or minus sign.

Positive American odds

Decimal = 1 + (American ÷ 100)

For +150: 1 + (150 ÷ 100) = 2.50. Positive moneyline odds show profit for each $100 staked.

Negative American odds

Decimal = 1 + (100 ÷ |American|)

For −110: 1 + (100 ÷ 110) = 1.9091 when rounded. The bars mean use the number without its minus sign.

Convert American odds ↑
QUICK ANSWERS

Odds conversion FAQs

What are −110 odds in decimal?

−110 American odds convert to 1.909090… decimal odds, usually shown as 1.91. VigFox displays 1.9091 and an implied probability of 52.38%.

What are 2.50 decimal odds in American?

2.50 decimal odds equal +150 American odds. Both mean a $100 winning bet earns $150 profit, with a total return of $250.

Are moneyline odds the same as American odds?

American odds are often called moneyline or US odds. The format uses positive and negative numbers, such as +150 and −110. It can describe a moneyline bet, a spread, or a total; converting the price does not change the market.

What are even money odds?

Even money is 2.00 in decimal odds and +100 or −100 in American odds. A winning $100 bet earns $100 profit. This converter shows +100 when you enter 2.00.

Why does 1.91 convert to about −109.89 instead of −110?

1.91 is a rounded display of the decimal equivalent of −110. Converting that rounded number back gives −109.8901. For more precise results, use the unrounded price when available.

How is implied probability calculated?

Divide 100 by the decimal odds to get a percentage. At 2.50, 100 ÷ 2.50 = 40%. This is the win rate needed to break even at that price, before fees. It does not remove sportsbook margin or predict the actual chance of winning.

Is VigFox's odds converter free?

Yes. You can convert American and decimal betting odds without an account or subscription. Calculations run in your browser; the odds you enter are not uploaded.