Double bet calculator
Calculate double bet returns. Enter odds for 2 selections and your stake to see combined odds, returns, and implied probability.
Total returns
£12.00
Profit
£11.00
Combined odds
11/1
Decimal odds
12.00
Implied probability
8.3%
Return on stake
+1100%
| Selection | Odds | Decimal | Implied Prob. |
|---|---|---|---|
| Selection 1 | 2/1 | 3.00 | 33.3% |
| Selection 2 | 3/1 | 4.00 | 25.0% |
| Double | 11/1 | 12.00 | 8.3% |
What is a double bet?
A double is the simplest accumulator — two selections combined into one bet. Both must win for the bet to pay out. The odds multiply together, so a double at 2/1 and 3/1 gives combined odds of 11/1.
Double vs two singles
Two singles at 2/1 and 3/1 with £1 each cost £2 and return a maximum of £4 (if both win). A £1 double at the same odds costs £1 and returns £12 if both win — but returns nothing if either loses. Higher potential, higher risk.
How the double calculator works
How returns are calculated
A double multiplies the decimal odds of both selections together. If selection 1 is 2/1 (3.00 decimal) and selection 2 is 3/1 (4.00 decimal), the combined decimal odds are 3.00 × 4.00 = 12.00. A £1 stake returns £12.00 with a profit of £11.00.
Understanding implied probability
The implied probability of a double is the product of each selection's individual probability. If each selection has a 33% chance of winning, the double has roughly an 11% chance — both must win. This is why doubles offer higher odds but are harder to win than singles.
When a selection is void
If one selection in your double is void (non-runner, postponed match), the bet reduces to a single on the remaining selection. Your stake stays the same — you just get paid at the surviving selection's odds instead of the combined odds.