Odds Converter

How to Use This Calculator

1. Select your input format (American, Decimal, Fractional, or Implied %).
2. Enter the odds value.
3. Get the converted American, Decimal, and Implied % instantly.
4. Use All Formats tab to see every format at once.
5. Use International tab for Hong Kong, Indonesian, and Malay odds.

Formula

Example

Frequently Asked Questions

• How do I convert American odds to decimal? ▼
  Positive (+150): decimal = (150/100) + 1 = 2.50. Negative (−110): decimal = (100/110) + 1 = 1.909. Decimal odds show total return per $1 wagered including your stake.
• How do I convert decimal to fractional odds? ▼
  Subtract 1 from decimal odds: 2.50 − 1 = 1.5 → 3/2. Then simplify the fraction using GCD. 1.909 − 1 = 0.909 ≈ 10/11.
• What are Hong Kong odds? ▼
  Hong Kong odds = decimal odds − 1. They show profit per unit staked (same as fractional odds expressed as a decimal). −110 American = HK 0.909.
• What are Indonesian odds? ▼
  Indonesian odds show profit per unit: if profit ≥ 1 unit (positive like American), they're the same as HK odds. If profit < 1, they're expressed as a negative reciprocal: HK 0.909 → Indo −1.10.
• What are Malay odds? ▼
  Malay odds work similarly to Indonesian but with the sign logic reversed: positive Malay when profit ≤ 1 (underdog), negative Malay for favorites. HK 0.909 → Malay 0.909; HK 1.50 → Malay −0.667.

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