Sports Betting Calculators
Convert odds between formats, work out what a bet or parlay pays, and see how much margin a sportsbook builds into its prices. Free, no sign-up, and nothing you enter leaves your browser.
Before you use them
Odds show what a bet pays, not how likely you are to win. Every price includes the sportsbook’s margin, so over time bettors lose more than they win. For players aged 21 and over, on PAGCOR-licensed sportsbooks only.
On this page
Odds converter
Convert odds between decimal, Hong Kong, Malay, Indonesian, American and fractional, and see the implied probability.
How the odds converter works
Every format is turned into decimal odds first, then into the others. Implied probability is 1 divided by the decimal odds. It includes the sportsbook’s margin, so the real chance is usually a little lower.
Worked example
Decimal 1.85 is Hong Kong 0.85, Malay 0.85, Indonesian −1.18, American −118 and fractional 17/20, with an implied probability of 54.1%.
Bet payout calculator
Enter your stake and the odds to see what a winning bet returns.
How the bet payout calculator works
Total return = stake × decimal odds. Profit = total return minus your stake. If the bet loses, you lose the whole stake.
Worked example
₱500 at decimal odds of 1.85 returns ₱925: your ₱500 stake plus ₱425 profit.
Parlay calculator
Add up to 12 legs to see the combined odds, what the parlay pays, and the implied chance that every leg wins.
How the parlay calculator works
Combined odds = every leg’s decimal odds multiplied together. All legs must win. Because each leg includes the sportsbook’s margin, the margin multiplies too: parlays pay more because they lose far more often.
Worked example
Three legs at 1.90, 2.10 and 1.50 combine to 5.985. A ₱100 parlay returns ₱598.50 if all three win, which the odds suggest happens about 17% of the time.
Bookmaker margin calculator
Enter the odds for every outcome in a market to see the sportsbook’s margin and the fair odds with the margin removed.
How the margin calculator works
Add up 1 ÷ odds for every outcome. Without a margin this would be exactly 100%; anything above that is the sportsbook’s margin. Fair odds spread the margin back across the outcomes in proportion. A lower margin means better value for the same bet.
Worked example
A basketball moneyline at 1.91 on both sides adds up to 104.71%, a margin of 4.71%. The fair odds for each side would be 2.00.
Odds formats, explained
Sportsbooks in the Philippines often show decimal or Hong Kong odds, and Asian handicap markets frequently use Malay or Indonesian odds. Here is what each one means.
Format
Example
What it means
Decimal
1.85
Total return per ₱1 staked, including your stake: ₱100 returns ₱185.
Hong Kong
0.85
Profit per ₱1 staked: ₱100 wins ₱85 profit. Always decimal odds minus 1.
Malay
0.85 or −0.80
Positive: profit per ₱1, like Hong Kong. Negative: risk ₱0.80 to win ₱1.
Indonesian
1.50 or −1.18
Positive: profit per ₱1 staked. Negative: what you risk to win ₱1.
American
+150 or −118
Plus: profit on a ₱100 stake. Minus: what you stake to win ₱100.
Fractional
17/20
Profit relative to stake: win ₱17 for every ₱20 staked.
Bet with a plan
Decide your budget before the game starts and stake only what you can afford to lose. Don’t chase losses with bigger bets or longer parlays, and be careful with live betting: prices change fast and so do decisions.
Need help with gambling?
CasinoGuide PH is for players aged 21 and over. Gambling should be entertainment, not a way to make money. If it stops being fun, call PAGCOR‘s National Problem Gambling Helpline at (02) 8248-9568, open 24/7, or read our Responsible gambling guide.
Frequently asked questions
Which odds format should I use?
Use whichever your sportsbook shows. The calculators convert between them, and decimal odds are the easiest for working out returns: stake × odds.
What does implied probability mean?
It’s the chance of a result that the odds suggest: 1 ÷ decimal odds. Because it includes the sportsbook’s margin, the real chance is usually lower.
Why do parlays pay so much?
Because every leg has to win, which happens much less often than any single bet. The sportsbook’s margin is in every leg, so it grows as you add legs.
Is a lower margin always better?
For the same bet, yes: a lower margin means the odds are closer to fair. Compare the same market across licensed sportsbooks before you bet.
Is my information saved?
No. Everything is calculated in your browser, and nothing you enter is stored or sent to us.