Decimal Odds Converter

Summary

Convert decimal odds to fractional, American (moneyline), and implied probability — instantly.

How it works

1. Implied probability = 1 / decimal odds × 100. Example: 1 / 2.50 × 100 = 40%.
2. American odds (positive, decimal ≥ 2): (decimal − 1) × 100. Example: (2.50 − 1) × 100 = +150.
3. American odds (negative, decimal < 2): −100 / (decimal − 1). Example: −100 / (1.50 − 1) = −200.
4. Fractional odds: numerator = decimal − 1, then reduce the fraction to its lowest terms using GCD.
5. Net profit = stake × (decimal − 1); total return = stake × decimal.

Use cases

• Translate European decimal odds to American moneyline before placing a bet on a US sportsbook.
• Find the implied probability of a line to judge whether it represents value.
• Cross-check odds across bookmakers that display different formats.
• Calculate your potential payout before placing a bet by entering your stake.
• Convert odds quickly when following live betting markets that switch formats.
• Identify favorite vs. underdog status from decimal odds at a glance.

Frequently Asked Questions