By What do decimal odds mean?
Most Philippine sportsbooks show decimal odds. The number is your total return for every ₱1 you stake, including the stake.
| Odds | ₱100 bet returns | Profit |
|---|---|---|
| 1.50 | ₱150 | ₱50 |
| 1.90 | ₱190 | ₱90 |
| 2.00 | ₱200 | ₱100 (even money) |
| 2.50 | ₱250 | ₱150 |
| 4.00 | ₱400 | ₱300 |
Formula: return = stake × odds, and profit = stake × (odds − 1). Lower odds mean a favourite; higher odds mean an underdog.
How do you turn odds into a probability?
Divide 1 by the decimal odds. That's the implied probability, the chance the price suggests.
- 1.50 → 1 ÷ 1.50 = 66.7%
- 2.00 → 1 ÷ 2.00 = 50%
- 2.50 → 1 ÷ 2.50 = 40%
- 4.00 → 1 ÷ 4.00 = 25%
This is the most useful number on the betslip. A bet only makes sense in the long run if you honestly believe the real chance is higher than the implied one, and even then, results swing a lot over a small number of bets. Walang odds na "sure win."
Converting to fractional and American odds
You'll see other formats on international sites and broadcasts. They describe the same price:
| Decimal | Fractional | American | Implied |
|---|---|---|---|
| 1.50 | 1/2 | −200 | 66.7% |
| 1.80 | 4/5 | −125 | 55.6% |
| 2.00 | 1/1 (evens) | +100 | 50% |
| 2.50 | 3/2 | +150 | 40% |
| 4.00 | 3/1 | +300 | 25% |
- Fractional = decimal − 1, written as a fraction (profit per unit staked).
- American, decimal 2.00 or more: (decimal − 1) × 100, shown with a plus sign. It's the profit on a 100 bet.
- American, decimal below 2.00: −100 ÷ (decimal − 1). It's how much you'd stake to profit 100.
Bookmaker margin: a worked example
Take a two-way basketball line where both sides are priced at 1.90. If the game were truly 50/50, fair odds would be 2.00 each. Add up the implied probabilities:
| Side | Odds | Implied probability |
|---|---|---|
| Team A | 1.90 | 52.63% |
| Team B | 1.90 | 52.63% |
| Total | 105.26% |
The extra 5.26% over 100% is the overround, also called the vig or juice. Put another way, if you bet ₱100 on each side, you stake ₱200 and get back ₱190 whichever team wins. The book keeps ₱10, or 5% of the money staked.
Three-way markets work the same way. A football match priced 2.40 / 3.30 / 3.00 gives 41.67% + 30.30% + 33.33% = 105.30%. To estimate the "fair" probability of each outcome, divide each implied probability by the total, e.g. 41.67 ÷ 105.30 ≈ 39.6%.
Comparing totals is a quick way to see which markets are priced more tightly. Lower total = smaller margin.
Why parlays multiply the margin
A parlay (accumulator) multiplies the odds of each leg, which looks exciting. But it also multiplies the bookmaker's cut.
Using the 1.90 vs fair 2.00 example, each leg returns about 95% of fair value (1.90 ÷ 2.00):
| Legs at 1.90 | Parlay odds | Fair odds | Share of fair value | Effective margin |
|---|---|---|---|---|
| 1 | 1.90 | 2.00 | 95.0% | ≈5% |
| 2 | 3.61 | 4.00 | 90.3% | ≈10% |
| 3 | 6.86 | 8.00 | 85.7% | ≈14% |
| 5 | 24.76 | 32.00 | 77.4% | ≈23% |
So a five-leg parlay can carry roughly four to five times the margin of a single bet. Fun as a small "pang-kape" ticket, but expensive as a strategy. If you want more on basketball markets, see basketball betting odds and bet types, and for how Bet88's sportsbook is laid out, the Bet88 sports betting guide.
