Betting Odds Converter
Enter any odds format below and the other three update instantly. Works with Bet9ja decimal odds, UK fractional, American moneyline, and implied probability.
Convert Odds
Used by Bet9ja. Stake × odds = total return.
UK format. Shows profit relative to stake.
US format. + = profit on ₦100, − = stake needed to win ₦100.
The bookmaker's estimated chance of the outcome.
Quick-Reference Odds Table
Here's a ready-made cheat sheet. Bookmark this page and come back whenever you need a quick conversion.
| Decimal | Fractional | American | Implied Prob. |
|---|---|---|---|
| 1.20 | 1/5 | -500 | 83.3% |
| 1.50 | 1/2 | -200 | 66.7% |
| 1.80 | 4/5 | -125 | 55.6% |
| 2.00 | 1/1 | +100 | 50.0% |
| 2.50 | 3/2 | +150 | 40.0% |
| 3.00 | 2/1 | +200 | 33.3% |
| 4.00 | 3/1 | +300 | 25.0% |
| 5.00 | 4/1 | +400 | 20.0% |
| 10.00 | 9/1 | +900 | 10.0% |
| 21.00 | 20/1 | +2000 | 4.8% |
How Each Odds Format Works
Decimal Odds (European)
This is the format Bet9ja uses. Decimal odds represent your total return per ₦1 staked, including your original stake. So odds of 2.50 mean you get ₦2.50 back for every ₦1 wagered: that's ₦1.50 profit plus your ₦1 stake.
Why does this matter? Because it makes accumulator calculations dead simple: just multiply all odds together and multiply by your stake.
Fractional Odds (UK)
Written as 3/2, 5/1, etc. The first number is your profit, the second is your stake. So 3/2 means "for every ₦2 you stake, you make ₦3 profit." If you're comparing international tipsters' picks with your Bet9ja booking codes, you'll often need to convert from fractional.
American Odds (Moneyline)
Used primarily in the US. Positive odds (+150) tell you how much profit you'd make on a ₦100 stake. Negative odds (−200) tell you how much you need to stake to win ₦100. You'll encounter these on US sports content and need to convert before placing bets on Bet9ja.
Implied Probability
This is the most useful conversion for serious punters. It tells you what the bookmaker thinks the actual chance of an outcome is. If you believe a team has a 50% chance of winning but the implied probability is only 40%, that's a value bet.
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