Moneyline Tool
Convert American moneyline prices to decimal, fractional and implied probability.
How to Use This Calculator
- Enter the American moneyline odds (e.g., -150 or +220)
- Choose whether the figure you enter is the amount risked or the amount to win
- Enter the dollar amount
- Read risk, to-win, total payout, and 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 is a moneyline bet?
A moneyline bet backs the outright winner of an event. No spread, no handicap, just the team or player you expect to win. American moneyline odds state the risk needed to win $100 (favourite) or the win on a $100 stake (underdog).
What does -150 mean?
Negative odds mark the favourite. -150 means risking $150 to win $100 (or $1.50 per $1 of target profit). That works out to roughly 60% implied probability.
What does +220 mean?
Positive odds mark the underdog. +220 means a $100 stake returns $220 profit, for a $320 total payout. Implied probability is about 31%.
How do I convert moneyline to decimal odds?
Positive odds: divide by 100, add 1. So +150 = 2.50 decimal. Negative odds: divide 100 by the absolute value, add 1. So -150 = (100/150) + 1 = 1.667.