Decimal odds explained without the maths headache

Decimal odds tell you what you get back for every ₦1 you stake, and that figure already includes your stake. So the maths is one multiplication: stake x odds = total return.

All the examples below are hypothetical. They show how the numbers work, not what any operator is offering.

Total return and profit

Say you stake ₦1,000 at odds of 2.50.

• Total return if it wins: ₦1,000 x 2.50 = ₦2,500
• Profit: ₦2,500 minus your ₦1,000 stake = ₦1,500
• If it loses, you lose the ₦1,000.

Odds of 2.00 double your stake if you win. Anything below 2.00 returns less profit than you staked. Odds of 1.20, for example, turn ₦1,000 into ₦1,200, which is ₦200 profit.

What the odds say about the chance of winning

You can turn decimal odds into the probability the price implies: 1 divided by the odds.

Decimal odds	Implied probability
1.50	66.7%
2.00	50%
2.50	40%
4.00	25%

This is the bookmaker's price, not a forecast you can rely on. It also includes the bookmaker's margin, which brings us to the next part.

Why the percentages add up to more than 100%

Take a match with two possible outcomes, and both are priced at 1.90.

• 1 / 1.90 = 52.63% for each side
• 52.63% + 52.63% = 105.26%

A fair price for two equal outcomes would add up to exactly 100%. The extra 5.26 percentage points is the bookmaker's built-in margin. It's how the operator expects to make money over many bets, whichever side wins. Comparing that total across markets is a simple way to see how much margin is in a price.

Accumulators: the odds multiply

In an accumulator, the odds of each selection are multiplied together, and every selection has to win.

Three selections at 1.50, 2.00 and 1.80:

• Combined odds: 1.50 x 2.00 x 1.80 = 5.40
• A ₦500 stake returns ₦500 x 5.40 = ₦2,700 if all three win
• Implied probability: 1 / 5.40 = about 18.5%

The bigger return comes with a lower chance of winning. One losing selection and the whole stake is gone. The margin on each selection also compounds when you combine them.

Converting from fractional odds

If you see fractional odds such as 3/2, divide the two numbers and add 1. So 3/2 is 1.5 + 1 = 2.50 in decimal.

A common misunderstanding

Higher odds don't mean better value. They mean the outcome is priced as less likely. And no reading of the odds, pattern or system changes the fact that you can lose your stake. Odds help you understand a price. They don't predict a result.

Before you place a bet

• Check the odds format your account is set to. Many sites let you switch.
• Work out the total return and the amount you could lose before you confirm.
• Remember that a bonus may set a minimum odds requirement. Our guide on checking a welcome bonus covers that.

If betting has started to feel like something you need to win back, our responsible gambling page lists support options and account controls.