Moneyline Helper
Turn American moneyline prices into decimal, fractional and a percentage chance.
How to Use This Calculator
- Type in the American moneyline odds (for example, -150 or +220)
- Decide whether the figure you’re about to enter is the amount you’ll risk or the amount you want to win
- Enter that dollar amount
- Check out your risk, your to-win figure, the total payout, and the conversions
Formula
Negative moneyline (favourite, e.g., -150): To-win = Risk × (100 / |odds|)
Positive moneyline (underdog, e.g., +220): To-win = Risk × (odds / 100)
Decimal Odds = (|odds| + 100) / 100 if positive, (100 / |odds|) + 1 if negative.
Implied Probability = 1 / Decimal Odds.
Frequently Asked Questions
What does a moneyline bet involve?
A moneyline bet is simply a wager on who wins the event outright. There’s no spread or handicap involved, you just back the team or player you expect to win. With American moneyline odds, a favourite shows how much you must risk to win $100, while an underdog shows how much you’d win from a $100 stake.
What's the meaning of -150?
A minus sign points to the favourite. -150 means you’ll risk $150 to win $100 (or $1.50 for each $1 you want to win), which works out to an implied probability of around 60%.
What does +220 tell me?
A plus sign points to the underdog. +220 means a $100 stake earns you $220 in profit, for a total payout of $320, which works out to an implied probability of about 31%.
How can I turn moneyline odds into decimal odds?
With positive odds, divide by 100 and add 1, so +150 becomes 2.50 decimal. With negative odds, divide 100 by the absolute value and add 1, so -150 becomes (100/150) + 1 = 1.667.