Free Betting Odds Converter

Q: "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."

Q: "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."

Q: "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."

Q: "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."

Q: "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%."

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

Enter Odds

Converted Odds

Decimal

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American

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Fractional

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Implied %

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Hong Kong

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Malay

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How to Use the Betting Odds Converter

Enter your odds value in the input field above
Select the input format from the dropdown (Decimal, American, Fractional, etc.)
Click Convert All Formats
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

Format	Example	Where used
Decimal	2.50	Europe, Australia, Canada
American	+150 / −200	United States
Fractional	3/2	United Kingdom
Hong Kong	1.50	Asia
Indonesian	1.50 / −1.50	Indonesia
Malay	0.67 / −0.67	Malaysia

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%.