Odds Converter

Enter any odds value into one of the four fields — American (moneyline), decimal, fractional, or implied probability — and every other format updates instantly. There's no button to press; the conversion happens in real time as you type. It works with pre-game odds, live in-play odds, and any sport.

For positive American odds: Decimal = (American / 100) + 1. For example, +200 becomes 3.00. For negative American odds: Decimal = (100 / |American|) + 1. For example, -150 becomes 1.667. Or simply type the American odds into our converter and read the decimal result instantly.

If decimal odds are 2.00 or higher: American = (Decimal − 1) × 100. For example, 2.75 becomes +175. If decimal is below 2.00: American = −100 / (Decimal − 1). For example, 1.50 becomes −200. Our converter applies these formulas automatically.

Divide the numerator by the denominator and add 1. For example, 7/4 = 1.75 + 1 = 2.75 decimal. So 5/2 becomes 3.50, and 1/2 becomes 1.50. The converter handles all fractional formats including improper fractions.

Implied probability converts odds into a percentage representing the bookmaker's estimated likelihood of an outcome. For -200 odds it's 66.7%; for +300 it's 25%. Comparing implied probability to your own assessment helps identify value bets where the true chance exceeds what the odds suggest.

Yes. The odds converter works with any odds value — whether it's a pre-game line or a live in-play price. Simply enter the odds shown by your sportsbook and all formats will update in real time.

American odds (moneyline) use positive and negative numbers to show profit per $100 wagered. Decimal odds show total return per unit staked including your stake. For example, 2.00 decimal equals +100 American — both mean double your money.

Yes. The SportBusy odds converter is 100% free with no sign-up required. Use it as often as you need for any sport or sportsbook.