American Money Line Calculator

American Money Line is a betting odds format that shows the amount you would win on a $100 bet. This calculator helps you convert money line odds to probabilities and calculate potential payouts.

What is American Money Line?

The American Money Line is a common way to express betting odds in the United States. It shows the amount you would win on a $100 bet if you win. For example:

+150 means you win $150 on a $100 bet (total payout $250)
-200 means you win $100 on a $200 bet (total payout $300)
+300 means you win $300 on a $100 bet (total payout $400)

Positive numbers indicate favorable odds, while negative numbers indicate unfavorable odds. The calculator converts these to probabilities and calculates potential payouts.

How to Use the Calculator

Enter the money line value (e.g., +150 or -200)
Enter your bet amount (default is $100)
Click "Calculate" to see the results
Review the probability, potential payout, and implied odds

This calculator assumes you're betting against the money line odds. For sports betting, these odds are typically provided by bookmakers.

How to Convert Money Line to Probability

The probability of winning can be calculated from the money line using these formulas:

If money line is positive (+X): Probability = 100 / (100 + X) If money line is negative (-X): Probability = X / (X + 100)

For example, a +150 money line converts to:

Probability = 100 / (100 + 150) = 0.4 or 40%

A -200 money line converts to:

Probability = 200 / (200 + 100) = 0.666 or 66.6%

How to Calculate Payouts

The payout is calculated based on your bet amount and the money line:

If money line is positive (+X): Payout = (Bet Amount * X) / 100 If money line is negative (-X): Payout = (Bet Amount * 100) / X

For example, betting $100 on +150 gives:

Payout = (100 * 150) / 100 = $150 Total Payout = $100 + $150 = $250

Betting $200 on -200 gives:

Payout = (200 * 100) / 200 = $100 Total Payout = $200 + $100 = $300

Frequently Asked Questions

What does a positive money line mean?

A positive money line (+X) means you win X dollars on a $100 bet. For example, +150 means you win $150 on a $100 bet.

What does a negative money line mean?

A negative money line (-X) means you need to bet X dollars to win $100. For example, -200 means you need to bet $200 to win $100.

How do I calculate the probability from a money line?

For positive money lines, use 100/(100+X). For negative money lines, use X/(X+100). See the "How to Convert Money Line to Probability" section for examples.

What's the difference between American and Decimal odds?

American odds use money line format (+/-X), while Decimal odds are a direct multiplier (e.g., 2.50 for +150). Fractional odds (e.g., 5/2) are another common format.