Fractional to decimal
(a ÷ b) + 1
6/4 → 1.5 + 1 = 2.50
Add 1 to include the stake.
Guides · Odds
Betting odds: what the price tells you and what it costs
Odds tell you two things: how much a winning bet pays and how likely the bookmaker thinks the outcome is. Bookmakers serving Bangladeshi bettors usually show decimal odds, where 2.60 means a ৳100 stake returns ৳260 if it wins.
This guide converts between formats, turns odds into probabilities and shows how to find the margin hidden in every price.
Decimal odds
Margin explained
18+
By
Ethan Moore
Updated 6 Oct 2026
- Odds 2.00
- 50.0% implied probability
- Odds 1.50
- 66.7% implied probability
- Lowest margin
- 4.8% NAGAD88, example
- Highest margin
- 6.5% 20bet, example
- Formula
- 1 ÷ odds gives the probability
Short answer
How do betting odds work?
Decimal odds × stake = what a winning bet returns. 1 ÷ odds = the chance the price implies. Add up the implied chances of every outcome and the amount over 100% is the bookmaker's margin: 4.9% for Krikya in our example T20.
Odds 2.60
38.5%
underdog, example
Odds 1.50
66.7%
favourite, example
Book sum
105.1%
Krikya, example
Margin
4.9%
Krikya, example
Odds formats
The same odds in three formats
The format does not change the price: 2.00, 1/1 and +100 pay exactly the same.
| Decimal | Fractional | American | Probability | Payout on ৳100 | Win on ৳100 | What it means |
|---|---|---|---|---|---|---|
| 1.50 | 1/2 | −200 | 66.7% | ৳150 | ৳50 | clear favourite. |
| 1.91 | 10/11 | −110 | 52.4% | ৳191 | ৳91 | a common price on near-even markets. |
| 2.00 | 1/1 | +100 | 50.0% | ৳200 | ৳100 | even money: double your stake back. |
| 2.60 | 13/8 | +160 | 38.5% | ৳260 | ৳160 | the underdog in our example T20. |
| 4.00 | 3/1 | +300 | 25.0% | ৳400 | ৳300 | about one time in four. |
| 11.00 | 10/1 | +1000 | 9.1% | ৳1,100 | ৳1,000 | a long shot. |
Calculated: probability = 1 ÷ decimal odds. The payout includes the stake.
Conversions
How to convert between formats
Plus odds to decimal
(A ÷ 100) + 1
+150 → 2.50
Plus odds show the profit on a 100 stake.
Minus odds to decimal
(100 ÷ |A|) + 1
−200 → 1.50
Minus odds show what you must stake to win 100.
Odds to probability
1 ÷ decimal odds
2.00 → 50%
The chance the price implies, before the margin is removed.
Margin Example odds
Find the margin in any match
| Outcome | Odds (Krikya, example) | 1 ÷ odds | Fair odds |
|---|---|---|---|
| Bangladesh | 2.60 | 38.5% | 2.73 |
| India | 1.50 | 66.7% | 1.58 |
| Sum | 105.1% | 100.0% |
Three steps
- Work out 1 ÷ odds for each outcome.
- Add them up: 105.1%.
- Margin = 1 − 1 ÷ the sum = 4.9%. Fair odds = odds × the sum.
Example odds, not live prices.
Value
A good bet is one where the odds are too high
Expected value per ৳100 = (your chance × odds − 1) × 100
| Your chance | Odds | The odds' chance | Value per ৳100 | What it means |
|---|---|---|---|---|
| 55% | 2.00 | 50.0% | +৳10 | worth a bet if your estimate is right. |
| 50% | 2.00 | 50.0% | ±৳0 | no edge. |
| 35% | 2.60 | 38.5% | −৳9 | you lose to the margin on average. |
| 42% | 2.60 | 38.5% | +৳9 | worth a bet if your estimate is right. |
Example odds Example odds
Same match, different prices
These are example odds set by our editors to show the calculation. They are not live prices.
T20 international · example match
Example odds · not live
Bangladesh
Sat 19:30
Start
India
Example odds for a T20 match winner, two outcomes. Not live prices.
How to read the table
Yellow marks the best price per outcome. The margin shows how much each bookmaker keeps on average: green is lowest, red highest.
What it means: in this example the dearest bookmaker costs ৳18 more per ৳1,000 staked than the cheapest.
Live
Bookmakers ranked
Welcome bonus
BDT 1,000
Live offer · see terms
Odds margin
4.9%
Example odds, T20 match winner
Bkash Nagad Bank Transfer E-wallets
Krikya review
18+ · T&Cs Apply · Play Responsibly
Welcome bonus
BDT 1,000
Live offer · see terms
Odds margin
4.8%
Example odds, T20 match winner
Bkash Nagad Rocket Bank Transfer
NAGAD88 review
18+ · T&Cs Apply · Play Responsibly
Welcome bonus
BDT 50,000
Live offer · see terms
Odds margin
5.4%
Example odds, T20 match winner
Bkash Nagad USD Coin JazzCash
Onrake review
18+ · T&Cs Apply · Play Responsibly
Welcome bonus
BDT 70,000
Live offer · see terms
Odds margin
5.1%
Example odds, T20 match winner
MoneyGO Jeton Skrill AstroPay
GoldPari review
18+ · T&Cs Apply · Play Responsibly
Welcome bonus
BDT 15,000
Live offer · see terms
Odds margin
5.0%
Example odds, T20 match winner
Bkash Nagad MoneyGO Jeton
888STARZ review
18+ · T&Cs Apply · Play Responsibly
Welcome bonus
BDT 13,000
Live offer · see terms
Odds margin
–
Bkash Nagad UPayCard Rocket
WinWin review
18+ · T&Cs Apply · Play Responsibly
Glossary
Glossary
- Decimal odds
- The total return per 1 taka staked, stake included. So what: stake × odds is what a winning bet pays back.
- Implied probability
- 1 ÷ decimal odds: the chance the price suggests. So what: if your own estimate is higher, the bet may have value.
- Margin
- The share of all stakes a bookmaker keeps on average, built into the odds. So what: a lower margin means more of your stake comes back over time.
- Fair odds
- Odds with the margin taken out. So what: the gap between fair and offered odds is what you pay.
- Value bet
- A bet where your estimated chance is higher than the odds imply. So what: only value bets win in the long run, and only if your estimate is right.
FAQ
What do decimal odds mean?
The total return per 1 taka staked, including the stake. Odds of 2.60 return ৳260 on a ৳100 stake: ৳160 profit plus your ৳100.
How do I turn odds into a probability?
Divide 1 by the decimal odds. Odds of 2.00 imply 50%, odds of 1.50 imply about 66.7%.
What is the bookmaker's margin?
The amount by which the implied probabilities of all outcomes add up to more than 100%. In our example T20, NAGAD88 has the lowest margin at 4.8% and 20bet the highest at 6.5%.
Why do odds differ between bookmakers?
Each bookmaker sets its own margin and reacts to its own customers' bets. Comparing prices before you bet is the simplest way to pay less margin.
Which odds format is best?
None changes the price. Decimal is the easiest to calculate with, which is why most sites show it by default.
Is online betting legal in Bangladesh?
No. The Gambling Prevention Act 2026, passed on 1 July 2026, replaced the Public Gambling Act 1867 and makes online gambling and online betting offences, with prison terms of up to five and seven years respectively, or fines, or both. A bookmaker's foreign licence does not change this. See our responsible gambling page.