Odds Converter
Type any format on the left. The other formats and the implied probability update instantly.
American
+150
Decimal
2.500
Fractional
3/2
Implied Probability
40.00%
Before sportsbook vig
What this means
American odds use +X for underdogs (profit on a $100 bet) and -X for favorites (stake needed to win $100). Decimal odds multiply your stake to give total return; +150 = 2.5 = win $1.50 per $1 bet. Fractional is the same idea as a fraction: 3/2 = $3 profit per $2 staked.
Implied probability = 1 / decimal odds. It's the win rate the price implies before vig. A market's two implied probabilities will always sum to slightly more than 100% — that excess is the sportsbook's margin (use the No-Vig Calculator to strip it out).