Convert American odds into decimal, fractional and implied probability.
American odds switch definition at the even-money point, which is why they change sign. Minus 150 means staking 150 to win 100, while plus 150 means staking 100 to win 150. The sign change is why American odds cannot be compared arithmetically across favourites and underdogs without converting first.
American Odds
Positive odds give profit on a 100 stake; negative odds give the stake needed to win 100
These figures are estimates based on population-average formulas and are intended for training and recreational planning only. They are not medical advice. Consult a qualified health professional before starting or changing an exercise programme, particularly if you have an existing medical condition.
Positive odds give profit on a 100 stake; negative odds give the stake needed to win 100 American odds switch definition at the even-money point, which is why they change sign. Minus 150 means staking 150 to win 100, while plus 150 means staking 100 to win 150.
The sign change is why American odds cannot be compared arithmetically across favourites and underdogs without converting first.
This calculator takes 1 input: American odds. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.