Moneyline Calculator
Convert American moneyline odds to decimal, fractional, and implied probability. Calculate risk, to-win, and payout for any stake.
How to Use This Calculator
- Enter the American moneyline odds (e.g., -150 or +220)
- Choose whether the amount you’ll enter is what you risk or what you want to win
- Enter the dollar amount
- View 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 is a wager on the straight winner of an event. There is no spread or handicap — you pick the team or player you think will win. American moneyline odds show how much you must risk to win $100 (favourite) or how much you win from a $100 stake (underdog).
What does -150 mean?
Negative odds indicate the favourite. -150 means you must risk $150 to win $100 (or $1.50 for every $1 you want to win). The implied probability is roughly 60%.
What does +220 mean?
Positive odds indicate the underdog. +220 means a $100 stake wins $220 in profit. Total payout is $320. Implied probability is about 31%.
How do I convert moneyline to decimal odds?
For positive odds: divide by 100 and add 1. So +150 = 2.50 decimal. For negative odds: divide 100 by the absolute value and add 1. So -150 = (100/150) + 1 = 1.667.