Decimal odds
Decimal odds are the total return per unit staked, including the stake. At 2.40, ₦1,000 returns ₦2,400: ₦1,400 profit plus your ₦1,000 back. This is the format you see on Nigerian betting sites, and the one our calculators use.
Fractional odds
Fractional odds show the profit per unit staked. 7/4 means ₦7 profit for every ₦4 staked. To turn a fraction into decimal odds, divide and add 1: 7 ÷ 4 + 1 = 2.75. The fractional odds calculator does this for any price.
American odds
American (moneyline) odds use 100 as the base. A plus number is the profit on a 100 stake: +250 pays 250, decimal 3.50. A minus number is the stake needed to win 100: -150 means 150 to win 100, decimal 1.67.
Implied probability
Every price hides a percentage: 1 ÷ decimal odds. 2.00 implies 50%, 4.00 implies 25%, 1.25 implies 80%.
| Decimal | Implied chance | Fair if the real chance is |
|---|---|---|
| 1.25 | 80.0% | 80% |
| 2.00 | 50.0% | 50% |
| 3.00 | 33.3% | 33.3% |
| 6.00 | 16.7% | 16.7% |
When you add up the implied chances of all outcomes in a market, the total is above 100%. The extra is the bookmaker's margin, explained in our margin guide.
Short and long prices
Odds below 2.00 are called odds-on: you win less than you stake. Above 2.00 is odds-against. Neither is better on its own. What matters is whether the price pays enough for the real chance, which is the idea behind expected value.
Use the odds converter to switch between all four formats as you type.
Questions
Why do odds change before a match?
Bookmakers move prices as money comes in and as news arrives: injuries, line-ups, weather.
Are higher odds always better?
For the same outcome, yes: you get paid more. Between different outcomes, no: longer odds win less often.
What does evens mean?
Decimal 2.00, fractional 1/1, American +100. You win what you stake.