WJ2 Odds Conversion in Three Steps, Six Formats Shown
Turn any price into decimal odds first, then derive the others: fractional is decimal minus 1, Hong Kong is the same number, Malay and Indo flip sign rules around 1, and American is plus or minus per 100.
Key facts and contents
- Step 1
- Write the price as decimal odds
- Step 2
- Derive the other formats from decimal D
- Step 3
- Apply the Malay and Indo sign rules
- Step 4
- Check the implied probability
Odds conversion turns one price into the same price written another way, and it takes three steps once you pick a hub format. Sportsbooks and sources use decimal, fractional, Hong Kong, Malay, Indo and American styles, and the numbers look unrelated until you see the arithmetic. This page shows that arithmetic and ends with a table you can check by hand. It sits inside the map of betting markets and their prices, and sports betting is for players aged 21 and above.
Odds conversion step 1: write the price as decimal odds
Decimal odds are the hub because the return is simply stake times price. A price of 2.50 returns ₱250 on a ₱100 stake, profit included. Every other format converts to decimal in one line.
| If the price is | Decimal odds are | Example |
|---|---|---|
| Fractional a/b | 1 plus a/b | 3/2 gives 1 plus 1.5 = 2.50 |
| Hong Kong h | 1 plus h | 1.50 gives 2.50 |
| American +A | 1 plus A/100 | +150 gives 1 plus 1.5 = 2.50 |
| American -A | 1 plus 100/A | -200 gives 1 plus 0.5 = 1.50 |
Step 2: derive fractional odds and Hong Kong odds from decimal
Call the decimal price D. The profit per peso staked is D minus 1, and that single number shows up in several formats.
- Fractional odds: write D minus 1 as a fraction. D = 2.50 gives 1.5, which is 3/2.
- Hong Kong odds: use D minus 1 as it stands, so 1.50. Hong Kong odds exclude the stake, like fractional.
- American odds: if D is 2 or more, write plus (D minus 1) times 100, so D = 2.50 gives +150. If D is below 2, write minus 100 divided by (D minus 1), so D = 1.50 gives minus 100 divided by 0.5, which is -200.
Step 3: apply the Malay and Indo sign rules, then check Indo odds
Let H be the Hong Kong number. Malay odds equal H when H is 1 or less; when H is above 1 they become minus 1 divided by H. Indo odds equal H when H is 1 or more; when H is below 1 they become minus 1 divided by H.
- D = 2.50, so H = 1.50. Malay: H is above 1, so minus 1 divided by 1.50 = -0.67.
- Indo: H is above 1, so Indo stays +1.50.
- D = 1.50, so H = 0.50. Malay stays 0.50. Indo: H is below 1, so minus 1 divided by 0.50 = -2.00.
A quick check on Indo odds: a negative Indo number is the amount you stake to win one unit, so -2.00 means stake 2 to win 1.
Step 4: check implied probability
Implied probability is 1 divided by the decimal price, written as a percentage. It tells you how likely the price says the outcome is, before the book’s margin.
| Decimal | Fractional | Hong Kong | Malay | Indo | American | Implied probability |
|---|---|---|---|---|---|---|
| 1.50 | 1/2 | 0.50 | 0.50 | -2.00 | -200 | 66.7% |
| 1.80 | 4/5 | 0.80 | 0.80 | -1.25 | -125 | 55.6% |
| 2.00 | 1/1 | 1.00 | 1.00 | +1.00 | +100 | 50.0% |
| 2.50 | 3/2 | 1.50 | -0.67 | +1.50 | +150 | 40.0% |
| 4.00 | 3/1 | 3.00 | -0.33 | +3.00 | +300 | 25.0% |
Each row is computed from the formulas above: for 1.80, D minus 1 is 0.80, so fractional 4/5, Hong Kong 0.80, Malay 0.80, Indo minus 1 divided by 0.80 = -1.25, American minus 100 divided by 0.80 = -125, and 1 divided by 1.80 = 55.6%. The tie rule in some placing markets, covered by dead heat rules on ties, divides the stake and so changes the effective price, which is why these arithmetic checks matter. For esports, the TF Gaming lane page shows which market names to expect next to these prices.
FAQ
What is the easiest way to do odds conversion?
Go through decimal odds. Convert the price you have into decimal, then convert from decimal into the format you want. One hub format means you only need one formula per format instead of a formula for every pair.
What is implied probability?
It is the chance a price suggests, calculated as 1 divided by the decimal price. Decimal 2.50 implies 40 percent, and 4.00 implies 25 percent.
Why do Malay and Indo prices carry a minus sign?
Both formats flip sign around a threshold: Malay goes negative when the Hong Kong number is above 1, and Indo goes negative when it is below 1. The minus sign means you must stake that number's reciprocal to win one unit, so read the sign as part of the price.
Ano ang pinakamadaling paraan ng odds conversion?
Gawing decimal muna ang presyo, tapos i-convert mula sa decimal papunta sa format na gusto mo.