Moneyline Betting Tool
Convert American moneyline prices into decimal, fractional and probability terms.
How to Use This Calculator
- Enter the American moneyline odds (for example, -150 or +220)
- Decide whether the figure you are about to enter represents what you risk or what you aim to win
- Enter the dollar amount
- Review your risk, your to-win figure, the total payout, and the format 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 a straightforward wager on who wins the event outright. No spread or handicap applies; you simply back the team or player you expect to prevail. American moneyline odds reveal how much you must risk to win $100 on a favourite, or how much a $100 stake returns in profit on an underdog.
How do I read -150?
A negative price marks the favourite. -150 means you have to risk $150 to win $100, or $1.50 for each $1 of intended profit. That corresponds to an implied probability of roughly 60%.
How do I read +220?
A positive price marks the underdog. +220 means a $100 stake earns $220 in profit, bringing the total payout to $320. The implied probability sits at around 31%.
How is moneyline converted into decimal odds?
With positive odds, divide by 100 and add 1, so +150 becomes 2.50 in decimal. With negative odds, divide 100 by the absolute value and add 1, so -150 becomes (100/150) + 1 = 1.667.