Sports
Betting Odds Explained: Decimal Odds and Probability
Key Points
- Decimal odds show total return per unit staked, including the stake.
- Divide 1 by the odds to get the implied probability.
- Add the implied probabilities of all outcomes and the excess over 100 percent is the margin.
- Value exists only when your estimate beats the price; it never promises a win.
- 18+ only
- Official partner site
- Checked 5 Nov 2026
- Bet with limits
Odds are a price tag and a probability wearing the same coat. Once you can read them, every sportsbook screen makes more sense, including the BTi board we saw on L89. This guide covers decimal odds, implied probability, the margin and a few worked examples in Taka. All figures are examples for learning, not L89 prices. We are the official L89 partner site.
Decimal odds in one line
Decimal odds, common across many sportsbooks, show the total you receive for every 1 unit staked, stake included. At 2.50, a 100 Taka stake returns 250 Taka if it wins: 150 Taka profit plus your 100 Taka back. At 1.40, 100 Taka returns 140 Taka, a profit of 40.
Implied probability
Divide 1 by the odds. At 2.00 the implied chance is 50 percent. At 4.00 it is 25 percent. At 1.25 it is 80 percent. This is the bookmaker's price of the event, and your job is to decide whether the true chance is higher or lower.
| Decimal odds | Implied probability | 100 Taka stake returns |
|---|---|---|
| 1.25 | 80 percent | 125 Taka |
| 1.80 | About 56 percent | 180 Taka |
| 2.00 | 50 percent | 200 Taka |
| 3.50 | About 29 percent | 350 Taka |
| 5.00 | 20 percent | 500 Taka |
The margin hiding in the numbers
Take a two-team match priced at 1.90 each. Implied probabilities are about 52.6 percent each, so the total is 105.3 percent. The 5.3 points above 100 are the bookmaker's margin. A market with a smaller excess is better value for you. Three-way markets such as football results work the same way: add all three.
A worked value example
Suppose you think a player has a 55 percent chance of winning, and the price is 2.10. Implied probability is about 47.6 percent. If your estimate is right, the bet has value, because you are getting a better price than the true chance. On 100 Taka, the expected return is 55 percent times 210, which is 115.5 Taka. If your estimate is wrong, expected value flips. Value is an opinion, not a certainty, and one bet proves nothing. Read more in value betting.
Staking and reality
Pros of understanding odds: you avoid overpriced bets and spot margins. Cons: the knowledge can create overconfidence. Even a correct estimate loses often. Use fixed small stakes, avoid chasing and respect your limits. See responsible gaming. Apply odds to specific sports in football, cricket odds and the sports betting hub.
Three moves
Read any price in 3 steps
- 1Convert to probability
Divide 1 by the decimal odds to see the implied chance.
- 2Add the full market
Sum all outcomes to see the margin above 100 percent.
- 3Compare with your view
Bet only if your honest estimate is meaningfully higher, and stake a small unit.