Canadian sportsbooks quote decimal odds. The number is not a prediction and it is not a payout — it is a multiplier, and once you can read it you can read every market on the board.
The number is your total return
Decimal odds tell you what a winning stake of one dollar returns in total, stake included. At odds of 1.85, a $10 bet returns $18.50: your $10 back, plus $8.50 profit.
That “stake included” part is the one thing people get wrong. Odds of 2.00 are not double your money in profit — they are double your money in return, which is an even-money bet. Anything below 2.00 returns less profit than you risked. Anything above 2.00 returns more.
Turning odds into a probability
Divide one by the odds and you get the implied probability — what the price says the chance is.
- 1.85 → 1 ÷ 1.85 = 54.1%
- 3.95 → 1 ÷ 3.95 = 25.3%
- 4.20 → 1 ÷ 4.20 = 23.8%
This is the single most useful habit in betting. It converts a price into a claim you can actually disagree with. “Is 1.85 good value?” is an unanswerable question. “Do I think this happens more than 54% of the time?” is a question you can hold an opinion about.
Why the percentages add up to more than 100
Take those three prices as the home, away and draw in one three-way market. Their implied probabilities are 54.1%, 25.3% and 23.8% — a total of 103.2%.
Real probabilities sum to 100%. The extra 3.2 points are the margin, sometimes called the overround or the vig: the book’s built-in edge, priced into every selection. Strip it out and the home side’s fair price is nearer 52.4%.
The margin is why betting is hard, and it is the reason a coin-flip strategy loses money over time even though it wins half its bets. You are not trying to beat the event. You are trying to beat the event plus the margin.
Comparing two prices
Because the margin varies between books and between markets, the same outcome can carry different prices. Converting both to implied probability is the only way to compare them honestly — 1.91 and 1.87 look nearly identical, but they are 52.4% and 53.5%, and over a season that gap is the whole difference between a small edge and none.
Decimal odds tell you what a market believes. They do not tell you what will happen, and no reading of them turns a bet into a safe one.
Decide what a session is worth to you before you place it, and set a deposit limit that holds you to it.