Free Betting Odds Converter

Convert betting odds between American, Decimal, Fractional, Hong Kong, Indonesian, and Malay formats instantly. The most accurate odds converter tool online.

Decimal American Fractional Hong Kong Indonesian Malay

Converted Odds
Decimal
American
Fractional
Implied %
Hong Kong
Malay

How to Use the Betting Odds Converter

  1. Enter your odds value in the input field above
  2. Select the input format from the dropdown (Decimal, American, Fractional, etc.)
  3. Click Convert All Formats
  4. Instantly see your odds converted to all 6 major formats

Odds Conversion Formulas

Decimal to American

  • If Decimal ≥ 2.00: American = (Decimal − 1) × 100
  • If Decimal < 2.00: American = −100 ÷ (Decimal − 1)

American to Decimal

  • Positive (+150): Decimal = (150 ÷ 100) + 1 = 2.50
  • Negative (−200): Decimal = (100 ÷ 200) + 1 = 1.50

Fractional to Decimal

Decimal = (Numerator ÷ Denominator) + 1

Decimal to Implied Probability

Implied % = (1 ÷ Decimal) × 100

Supported Odds Formats

FormatExampleWhere used
Decimal2.50Europe, Australia, Canada
American+150 / −200United States
Fractional3/2United Kingdom
Hong Kong1.50Asia
Indonesian1.50 / −1.50Indonesia
Malay0.67 / −0.67Malaysia

Frequently Asked Questions

How do I convert American odds to Decimal?
For positive American odds (e.g. +150): Decimal = (American ÷ 100) + 1 = 2.50. For negative odds (e.g. -200): Decimal = (100 ÷ |American|) + 1 = 1.50.
What is the formula for Fractional to Decimal odds?
Decimal = (numerator ÷ denominator) + 1. So 3/2 fractional = (3÷2)+1 = 2.50 decimal. And 5/4 fractional = (5÷4)+1 = 2.25 decimal.
What are Hong Kong odds?
Hong Kong (HK) odds represent profit per unit staked, equal to Decimal odds minus 1. For example, decimal 2.50 = HK 1.50. HK odds are always positive and common across Asian betting markets.
How do Malay odds work?
Malay odds use a scale of 1 instead of 100 like American odds. Positive Malay odds (e.g. 0.85) mean you profit 0.85 per unit staked. Negative Malay odds (e.g. -1.18) mean you must stake 1.18 to win 1 unit.
What is implied probability and how is it calculated?
Implied probability = (1 ÷ Decimal Odds) × 100. It shows the bookmaker's embedded win percentage. For decimal 2.50: (1÷2.50)×100 = 40%. The bookmaker margin means implied probabilities for a market sum to more than 100%.