What is the difference between positive and negative American odds?

Positive odds (+150) show the profit on a $100 bet; a $100 wager returns $250 total. Negative odds (-150) show the stake needed to win $100 profit; a $150 wager returns $250 total. Higher positive numbers indicate larger underdogs.

How do decimal odds work on Canadian sportsbooks?

Decimal odds represent total return per $1 wagered, including the original stake. A decimal of 2.50 means a $1 bet returns $2.50 total, or $1.50 profit. Calculate total payout by multiplying your stake by the decimal odds.

What is implied probability in sports betting?

Implied probability is the likelihood of an outcome embedded in the odds. For example, American odds of +150 imply a 40% chance, while -200 implies 66.7%. This reflects the sportsbook's estimate and includes the house margin.

Who regulates sports betting odds in Ontario?

Ontario players should verify the exact sportsbook domain in iGaming Ontario’s regulated-market directory before depositing. The public directory listed 47 regulated operators and 81 gaming websites, accurate on June 29, 2026.

Betting Education

Sports Betting Odds Explained

American, decimal, and fractional odds demystified — with payout examples, implied probability, July 6 source checks, market-movement cautions, Ontario site checks, province-source boundaries, and canonical non-AMP indexing.

American odds show payout and implied probability with a + or −. A −150 favourite needs a $150 stake to win $100 (returns $250); a +150 underdog wins $150 on a $100 stake (returns $250). Decimal (2.50) and fractional (3/2) express the same maths.

Odds are set by the operator and shift with the market; all three formats convert to the same payout. For Ontario, verify the exact sportsbook domain in iGaming Ontario’s regulated-market directory and treat AGCO sport-and-event standards as the rules baseline. For Alberta, use the current official source and its stated scope before relying on platform-specific information. This canonical non-AMP guide uses educational examples, not live prices. Minimum-age rules vary by province and product. Play responsibly.

July 6 source-check before reading odds

Before comparing any line, confirm you are on a legal sportsbook for your province. iGaming Ontario’s regulated-market directory listed 47 regulated operators and 81 gaming websites, accurate on June 29, 2026; AGCO sport-and-event standards remain the Ontario rules baseline. Alberta readers should use the current official source and its stated scope before relying on platform-specific information.

Match the exact website domain in the official directory before creating an account or depositing, and use this non-AMP canonical page for indexing rather than an AMP alternate: iGaming Ontario regulated market directory.

American Odds

Used by all Canadian sportsbooks

Positive odds (+150): Underdog

A $100 bet at +150 wins $150 profit ($250 total). The number tells you how much you win on a $100 bet. Higher number = bigger underdog = higher payout.

Negative odds (-150): Favourite

A bet at -150 requires wagering $150 to win $100 profit ($250 total). The number tells you how much you must bet to win $100. Higher absolute number = bigger favourite.

Decimal Odds

Popular in Europe, used on some Canadian sites

Decimal odds show your total return per $1 wagered (including your stake). 2.50 decimal = $1 bet returns $2.50 total = $1.50 profit. Conversion: American +150 = Decimal 2.50. Formula: Total payout = Stake × Decimal odds

Fractional Odds

Used in horse racing

Fractional odds (e.g., 3/2) show profit relative to stake. 3/2 means: win $3 for every $2 wagered = $150 profit on a $100 bet. Equivalent to American +150. Used primarily in horse racing and some UK-licensed sportsbooks.

Implied Probability — The Key Concept

Every set of odds represents an implied probability — the market price for that outcome after margin is included. It is not a prediction guarantee, and the listed price can move before you place a wager. Do not treat sample odds as live odds, promotional advice, or a recommendation to bet.

American Odds	Implied Probability	Example
-200	66.7%	Heavy favourite (e.g., NHL Oilers vs expansion team)
-150	60.0%	Moderate favourite
-110	52.4%	Spread bet standard line (includes vig)
+100	50.0%	Even money — no favourite
+150	40.0%	Underdog
+300	25.0%	Significant underdog
+1000	9.1%	Long shot (e.g., Grey Cup winner pre-season)

Odds Calculator for Canadian Bets →Parlay Calculator Canada →Best Sports Betting Sites Canada →

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