Moneyline Calc
American moneyline to decimal, fractional and probability in one go.
How to Use This Calculator
- Key in the American moneyline odds (think -150 or +220)
- Decide whether the figure you’re entering is what you risk or what you aim to win
- Enter the dollar amount
- Read off risk, to-win, 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's a moneyline bet?
A moneyline bet backs the outright winner of an event — no spread, no handicap, just the team or player you fancy to win. American moneyline odds tell you how much to risk to win $100 (the favourite) or how much a $100 stake nets you (the underdog).
What does -150 tell me?
A minus number flags the favourite. -150 means you stake $150 to win $100 (or $1.50 for every $1 of profit you’re after). That works out to an implied probability of roughly 60%.
And +220?
A plus number flags the underdog. +220 means a $100 stake earns $220 in profit, for a total payout of $320. Implied probability sits around 31%.
How do I turn moneyline into decimal odds?
Positive odds: divide by 100, then add 1 — so +150 becomes 2.50 decimal. Negative odds: divide 100 by the absolute value, then add 1 — so -150 = (100/150) + 1 = 1.667.