Odds converter

How it works

US sportsbooks quote American (moneyline) odds, while European and British sites use decimal and fractional prices. This converter translates between all of them in one step.

Decimal: includes your stake. At 2.50, every unit staked returns 2.50 in total, a 1.50 profit.

Fractional: shows profit relative to stake only. 3/2 means you win 3 for every 2 staked; 1/1 is evens.

American: a + number is the profit on a 100 stake; a − number is what you must stake to win 100. The minus sign marks the favorite.

Implied probability: the chance the price represents, before removing the bookmaker’s margin.

Formulas

• Decimal = fractional + 1 (3/2 → 1.5 + 1 = 2.50)
• American, if decimal ≥ 2: + (decimal − 1) × 100
• American, if decimal < 2: − 100 ÷ (decimal − 1)
• Decimal from American: +A → A ÷ 100 + 1; −A → 100 ÷ A + 1
• Implied probability = 1 ÷ decimal × 100

Worked example

A +150 moneyline is 2.50 in decimal, 3/2 fractional and an implied probability of 40.00%. A $100.00 bet returns $250.00 ($150.00 profit). A −125 favorite is 1.80 in decimal, 4/5 fractional and 55.56%: you stake 125 to win 100.