American Odds Converter

Summary

Convert American (moneyline) odds to decimal, fractional, and implied probability — or reverse any format back to American. Enter a wager to see potential payout.

How it works

1. For positive American odds (+X): decimal = (X / 100) + 1; implied probability = 100 / (X + 100).
2. For negative American odds (−X): decimal = (100 / X) + 1; implied probability = X / (X + 100).
3. Fractional odds are derived from decimal odds: numerator = decimal − 1, simplified to lowest terms.
4. To convert decimal odds back to American: if decimal ≥ 2, American = (decimal − 1) × 100 (positive); if decimal < 2, American = −100 / (decimal − 1) (negative).
5. Payout = wager × (decimal odds); net profit = payout − wager.

Use cases

• Compare odds from US sportsbooks (moneyline) with European bookmakers (decimal/fractional).
• Quickly find the implied probability of a line to assess if it represents value.
• Calculate exactly how much you stand to win on a moneyline bet before placing it.
• Convert a probability estimate into moneyline odds when building your own line.

Frequently Asked Questions