Essentials

Odds Converter

Convert American, decimal, fractional, and implied probability odds in real time with a free betting odds converter.

Quick start

Enter odds in one field
Check converted values instantly
Use related tools for payout and EV decisions

Try a quick conversion example

Start with +150 American odds to see all formats update instantly.

odds format selector

Need help with odds formats? Learn this step

Enter American

Converted

Decimal1.909

Fractional10/11

Probability52.38%

Popular Odds Conversion Table

How to read implied probability in the table? Learn this step

American	Decimal	Fractional	Implied %
-200	1.50	1/2	66.67%
-110	1.91	10/11	52.38%
+100	2.00	1/1	50.00%
+150	2.50	3/2	40.00%
+200	3.00	2/1	33.33%

How the Odds Converter Works

Type in one odds format and all others update instantly. For example, enter -150 American and you immediately see 1.667 decimal, 2/3 fractional, and 60% implied probability. Use it to compare lines across sportsbooks that display different formats.

Supported Betting Odds Formats

American (moneyline), decimal, fractional, and implied probability — all four formats stay in sync as you type. No need to convert manually or remember formulas.

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Odds Converter FAQs

Positive: divide by 100 and add 1. Negative: divide 100 by the absolute value and add 1. Or just type into any field — every format updates live.

The break-even win rate the odds imply. Lower decimal odds = higher implied probability; higher decimal = lower. It’s the minimum rate you’d need to hit just to break even.

Yes. Type fractional in its field and the other three formats update instantly. Works in every direction — American to decimal, implied to fractional, any combo.

Whatever your sportsbook displays. American is the US default; decimal is standard in Europe and for math; fractional is common in the UK; implied probability is the clearest for thinking in terms of win rates.