How to Read Football Odds: What 25,000 Price Moves Taught Us
Odds are a bookmaker’s probability with a margin on top. Reading them means three skills: converting the format, stripping out the margin and understanding why prices move. For the last one we tracked 25,314 prices from first sighting to kick-off and checked which moves were right.
The three odds formats
Bookmakers show the same price in three ways. All three describe the same probability:
- Decimal (Europe): your total return per unit, stake included. 2.50 on 10 returns 25: 15 profit plus your 10.
- Fractional (UK and Ireland): profit relative to stake. 6/4 means 6 profit for every 4 staked, the same as 2.50 decimal.
- American (moneyline): +150 means 150 profit on a 100 stake; −200 means you stake 200 to win 100.
| Decimal | Fractional | American | Implied probability |
|---|---|---|---|
| 1.50 | 1/2 | −200 | 66.7% |
| 2.00 | 1/1 (evens) | +100 | 50.0% |
| 2.50 | 6/4 | +150 | 40.0% |
| 4.00 | 3/1 | +300 | 25.0% |
1 ÷ 2.50 = 0.40, so odds of 2.50 imply a 40% chance, before the margin is taken out. The converter below switches between all three formats for you.
Odds Converter
Convert between decimal, fractional, American and implied probability. Type in any field and the rest update.
For education only. Odds conversions are exact; no outcome is guaranteed. 18+. Please gamble responsibly.
The bookmaker margin
Add up the implied probabilities of every outcome and you get more than 100%. The excess is the margin, the bookmaker’s built-in profit:
1/2.10 + 1/3.40 + 1/3.50 = 47.6% + 29.4% + 28.6% = 105.6%, a 5.6% margin.
To get fair probabilities, divide each by 1.056: 45.1%, 27.9% and 27.1%.
In our data the average match result margin across six bookmakers was 7.29% at our first check and 6.51% at our last check before kick-off, on average 3.8 days later. Margins differ a lot by bookmaker; our odds guide compares them per bookmaker.
Margins shrink as kick-off approaches: from 7.29% to 6.51% on average. Early prices carry more margin, so betting early only pays if you are betting on information the market has not priced yet.
Reading line movement
Odds move between the first price and kick-off as money and news come in. We recorded the first and last price for every outcome at each bookmaker, 25,314 prices across 2,697 matches, and checked how each group did:
| Price move | Prices | Avg. odds first → last | Won | Implied at first | Return at first price | Return at last price |
|---|---|---|---|---|---|---|
| Shortened >5% | 2,795 | 3.73 → 3.35 | 35.5% | 34.2% | +1.2% | −8.4% |
| Shortened 2 to 5% | 2,826 | 3.10 → 3.00 | 37.8% | 37.9% | −0.7% | −3.9% |
| Stable | 10,990 | 3.18 → 3.18 | 35.6% | 37.0% | −3.7% | −3.6% |
| Drifted 2 to 5% | 3,972 | 3.25 → 3.36 | 32.9% | 36.0% | −9.1% | −6.1% |
| Drifted >5% | 4,731 | 3.87 → 4.39 | 24.6% | 32.3% | −26.8% | −18.6% |
Source: Daily Sport Pick odds snapshots from Pinnacle, Bet365, 10Bet, Unibet and others, 29 March to 12 October 2026, match result market, joined to final results. “Last price” is our last check before kick-off, not always the exact closing price. Return per unit staked, with margin.
The market moved in the right direction. Outcomes whose odds shortened by more than 5% won 35.5% of the time, more than their first price implied (34.2%). Outcomes that drifted by more than 5% won only 24.6%, far less than the 32.3% their first price implied.
Backing an outcome at its first price before it shortened returned +1.2%: the only group with a profit. The same bets at the later, shorter price lost 8.4%. That is the whole idea behind closing line value: if you regularly get a better price than the market ends at, you are probably on the right side.
The catch: you only know afterwards which way a price moved. Following a move that has already happened means taking the shorter price, and in our data that lost money. Treat a big drift as a warning, and a price that later shortens as a sign your reasoning was in line with the market, not as a tip to chase.
Do favourites win as often as the odds say?
We grouped every bookmaker price on a match by the favourite’s last odds and compared how often it won with the probability its odds implied:
| Favourite’s odds | Prices | Favourite won | Implied by odds |
|---|---|---|---|
| Below 1.50 | 1,176 | 76.3% | 75.7% |
| 1.50 to 2.00 | 3,100 | 53.3% | 57.3% |
| 2.00 and higher | 4,162 | 39.0% | 43.7% |
Source: Daily Sport Pick odds snapshots, 8,438 bookmaker prices on 2,697 settled matches, March to October 2026. Implied probability includes the margin.
Short favourites won 76.3% of the time against 75.7% implied: even with the margin included, they came in slightly more often than priced. In closer matches, where the favourite was at 2.00 or more, it won 39.0% against 43.7% implied. Bookmakers load most of their margin onto the longer prices.
Odds below 1.50 were almost fairly priced; the margin sits mostly on the outsiders and the close calls. That matches what we found on longshots in our odds guide: the longer the odds, the more the bookmaker keeps.
Comparing odds across bookmakers
Bookmakers price the same match differently, and taking the best price is the simplest edge there is:
At odds of 1.80: 55 × 16 − 45 × 20 = −20
At odds of 1.90: 55 × 18 − 45 × 20 = +90
A difference of 0.10 in the odds is worth 110 over 100 bets.
Prices also move at different speeds. How often each bookmaker changed its match result price between our first and last check:
| Bookmaker | Matches tracked | Price changed | Avg. move home odds |
|---|---|---|---|
| Pinnacle | 2,633 | 83.2% | 4.5% |
| Bet365 | 2,587 | 83.5% | 5.6% |
| 10Bet | 1,583 | 64.4% | 3.7% |
| Unibet | 1,605 | 51.5% | 3.7% |
Source: Daily Sport Pick odds snapshots, March to October 2026. “Price changed” means the home or away odds moved by more than 2%.
Pinnacle and Bet365 repriced more than four in five matches. Unibet left about half its prices unchanged. A bookmaker that reacts slowly is sometimes the one still offering the old, longer price after the market has moved, which is exactly where comparing prices pays off.
Home, draw or away: where the margin hurts least
Popular wisdom says home teams are overpriced and draws are undervalued. Our data, backing every outcome at its last price:
| Outcome | Prices | Avg. odds | Won | Return |
|---|---|---|---|---|
| Home win | 8,438 | 2.51 | 43.3% | −9.3% |
| Draw | 8,438 | 3.87 | 26.4% | −2.9% |
| Away win | 8,438 | 3.92 | 30.2% | −10.0% |
Source: Daily Sport Pick odds snapshots, 2,697 settled matches, March to October 2026, 1 unit per bet at the last price we recorded.
- Home teams are not obviously overpriced. Backing every home win lost 9.3%, about the same as every away win (−10.0%).
- Draws lost the least. Backing every draw lost only 2.9%, and draws whose price did not move returned +1.4% over 4,437 bets. A common explanation is that recreational bettors rarely back draws, so bookmakers have less reason to shade them.
- None of this is a system. Every group still lost money overall: the margin wins unless you have a reason to think a specific price is wrong.
Of the three outcomes, the draw carried the least margin in our data: −2.9% against −9.3% for home wins and −10.0% for away wins. It is a smaller loss, not a profit.
Frequently asked questions
What do decimal odds mean?
Decimal odds show your total return per unit staked, including your stake. Odds of 2.50 on a 10 stake return 25: 15 profit plus your 10 back. Divide 1 by the odds to get the implied probability: 2.50 means 40%.
What is the bookmaker margin?
The built-in profit in every market. Add up the implied probabilities of all outcomes and subtract 100%. In our data the average match result margin was 7.29% days before kick-off and 6.51% at our last check before the match.
What does it mean when odds shorten?
More money or new information has made that outcome more likely in the bookmaker’s eyes. In our data outcomes that shortened by more than 5% won 35.5% of the time, more than their first price implied, while outcomes that drifted by more than 5% won only 24.6%.
Should I bet early or close to kick-off?
Early prices carry more margin, but the price can move in your favour. In our data backing outcomes at their first price returned +1.2% only for those that later shortened. Since you cannot know that in advance, bet early only when you have a reason to think the price is wrong.
Are short-priced favourites fairly priced?
In our data, mostly yes. Favourites below 1.50 won 76.3% of the time against 75.7% implied by their odds. The margin sits mostly on longer prices and close matches, where favourites at 2.00 or more won 39.0% against 43.7% implied.
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