Gambling terms, explained straight

Odds, Probability & Bankroll

Positive odds meaning

Positive odds are a moneyline quotation where the number shows the net profit on a 100-unit stake, so +200 means a $100 bet wins $200.

Also called
American odds, moneyline odds.13
Example
+200 means risk $100 to win $200 profit, total return $300.3
Implied probability
100 / (X + 100). For +200: 100 / 300 ≈ 33.3%.13

Key points

  • Positive odds represent the net win on a 100-unit stake; +200 pays $200 profit on a $100 bet.13
  • The larger the positive number, the bigger the payout and the lower the implied probability of the outcome.13
  • Positive odds are used for outcomes considered less likely than even money.12

Where this term is used

Odds & probability Minus odds meaning Explains negative moneyline odds, which show the stake needed to win 100 units. Odds & probability Odds Covers the general concept of odds as a ratio of favorable to unfavorable outcomes. Odds & probability Betting odds Introduces the different formats used to quote odds in gambling. Odds & probability Fractional odds to decimal Shows how to convert between fractional and decimal odds formats. Odds & probability Odds vs probability Distinguishes the mathematical concepts of odds and probability. Odds & probability American odds Describes the American odds format, which includes both positive and negative numbers.

Sources

  1. Odds en.wikipedia.org Defines positive odds as the net win on a 100-unit stake and provides the implied probability formula.
  2. Fixed-odds betting en.wikipedia.org Confirms that positive odds apply to fixed-odds betting markets.
  3. Player Props: Understanding the Math Behind the Lines wizardofodds.com Provides the example of +200 and explains how positive odds work in practice.

Sources are drawn from regulators, universities and published research, and each one is labelled with what it actually is — a preprint is not called a paper. Bookmaker and affiliate pages are never cited here, because a page that sells betting is not a neutral authority on it.

Written and maintained by Ellis Warrender, writer and maintainer.

Last updated 28 July 2026. Spotted an error? Tell me and it gets fixed and logged on the corrections page.