What are American Odds?

American odds – sometimes known as moneyline odds – use $100 as the base for every price. They will be listed with a + for an underdog and a – for a favourite.

For example, in an NFL game the odds could look like this:

Arizona Cardinals +300 (underdog)  New England Patriots -200 (favourite)

How to Calculate Winnings with American Odds

With an underdog the odds show you how much you would receive from a $100 bet. The favourite’s odds tell you how much you would have to wager to make $100.

So, using the example from before, a $100 bet on Arizona could make you $300. A $100 bet on the Patriots would get you $50. The original stake would also be returned.

How to Convert American Odds to Decimal Odds

In Canada, you might want American odds converted to decimal. You could use an online American odds calculator – or use these formulas.

For positive (+) odds – Decimal odds = (US Odds divided by 100) + 1

For negative (-) odds – Decimal odds = (100 divided by US Odds) + 1

So Arizona would be 4.00 = (300 divided by 100) + 1

Here is a handy conversion table.

-200 = 1.50
+100 = 2.00
+200 = 3.00
+300 = 4.00
+400 = 5.00
+500 = 6.00
+1000 = 11.00
+2500 = 26.00
+5000 = 51.00
+10000 = 101.00

How to Convert American Odds to Fractional Odds

You may want to convert to traditional fractional odds too once you have had American odds explained to you.

The formulas here would be:

For positive (+) oddsFractional odds = US Odds divided by 100

For negative (+) oddsFractional odds = 100 divided by US Odds + 1

So New England would be ½ in the previous example.

Here’s the conversion table for American into fractional odds.

-200 = 1/2
+100 = 1/1
+200 = 2/1
+300 = 3/1
+400 = 4/1
+500 = 5/1
+1000 = 10/1
+2500 = 25/1
+5000 = 50/1
+10000 = 100/1

How to Calculate Sports Odds

Soccer bets may be listed in American odds depending on the site. A 1-x-2 bet is essentially a Moneyline bet with the added option of the draw (x).

Your winnings will depend on whether you are backing the favourite or the underdog. The odds for the draw will generally be somewhere between the two.

The points spread is a popular bet for NBA games and you will see the odds listed like this if the American odds are used:

  • LA Clippers -5.5 at -200
  • Boston Celtics +5.5 at +500

Totals bets work much the same for NBA and NFL – as you predict whether the total amount of points is over or under a set amount. The odds for these wagers will usually be the same.

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