Moneyline Calculator
Convert American ML to implied win chance and decimal price.
Enter + or − American odds; see implied probability (with vig removed option via normalization toggle in your head).
Moneyline Calculator
Adjust inputs to see updated results.
Table of Contents
How to Use This Calculator
Enter an American moneyline. The tool converts to decimal odds and implied probability (1/decimal), ignoring vig strip.
American ML
Examples: +150, −200. Parser handles standard US formats.
Implied prob
Raw implied = 1 / decimal. For no-vig, combine both sides.
Decimal output
Useful for parlay multiplication and EV math.
One side only
This is single-price implied—two-way markets need both legs for fair odds.
Implied Probability
Implied probability answers: “If I bet at this price and ignore vig, what win rate breaks even?” Compare to your model probability for value.
Examples
Example 1 — Default +150
Decimal ≈ 2.50, implied ≈ 40%. Verify live.
Example 2 — Heavy favorite −300
Decimal ≈ 1.333, implied ≈ 75%.
Example 3 — Two-way fair
Combine favorite and dog implied via normalization—use fair odds helpers.
Frequently Asked Questions
No—single-sided implied includes the book’s margin on that ticket.
Parser accepts decimal-style typing in many cases, but the field is labeled for American ML.
Use three prices and normalize—this page is one moneyline at a time.
Books add margin; sharp bettors estimate true p and compare.
Both shown—use decimal for acca math, American for US books.
