Moneyline Betting Calculator

American moneyline to decimal, fractional and probability.

Please enter valid odds
Please enter a valid stake amount
Results
Risk --
To Win --
Total Payout --
Decimal Odds --
Fractional Odds --
Implied Probability --

How to Use This Calculator

  1. Enter the American moneyline odds (e.g. -150 or +220)
  2. Specify whether your entered figure is the amount risked or the amount to win
  3. Enter the dollar amount
  4. 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

Moneyline bet — what is it?

A moneyline bet backs the outright winner of an event, with no spread or handicap — you pick the team or player to win. American moneyline odds show the risk needed to win $100 (favourite) or the win from a $100 stake (underdog).

What does -150 signify?

Negative odds mark the favourite. -150 requires $150 risked to win $100 (or $1.50 per $1 of intended win). Implied probability sits near 60%.

What does +220 signify?

Positive odds mark the underdog. +220 turns a $100 stake into $220 profit, for a $320 total payout. Implied probability runs about 31%.

Converting 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.