United Kingdom
Every figure on this page is calculated from the game's published rules. The operator's own odds page is linked below as verification — but the working is here, on this page.
A standard entry picks 5 numbers from 39 plus 1 from a separate pool of 14. The number of possible combinations is:
C(39, 5) = 575,757 × C(14, 1) = 8,060,598
| Division | Match | Winning combinations | Derived odds | Probability | Prize | Operator says |
|---|---|---|---|---|---|---|
| Match 5 + Thunderball | 5 main + 1 supp. | 1 | 1 in 8,060,598 | 1.241e-7 | £500,000 fixed | 1 in 8,060,598 |
| Match 5 | 5 main + 0 supp. | 13 | 1 in 620,046 | 1.613e-6 | £5,000 fixed | 1 in 620,046 |
| Match 4 + Thunderball | 4 main + 1 supp. | 170 | 1 in 47,415 | 2.109e-5 | £250 fixed | 1 in 47,416 |
| Match 4 | 4 main + 0 supp. | 2,210 | 1 in 3,647 | 0.0274% | £100 fixed | 1 in 3,648 |
| Match 3 + Thunderball | 3 main + 1 supp. | 5,610 | 1 in 1,437 | 0.0696% | £20 fixed | 1 in 1,437 |
| Match 3 | 3 main + 0 supp. | 72,930 | 1 in 111 | 0.9048% | £10 fixed | 1 in 111 |
| Match 2 + Thunderball | 2 main + 1 supp. | 59,840 | 1 in 135 | 0.7424% | £10 fixed | 1 in 135 |
| Match 1 + Thunderball | 1 main + 1 supp. | 231,880 | 1 in 34.76 | 2.88% | £5 fixed | 1 in 35 |
| Match Thunderball only | 0 main + 1 supp. | 278,256 | 1 in 28.97 | 3.45% | £3 fixed | 1 in 29 |
"Winning combinations" counts how many of the possible outcomes land in that division. "Operator says" is the operator's published figure — shown so you can check us against them (small differences are their rounding).
Odds of winning any prize
1 in 12.38
Sum of all division probabilities — usually the number the ads quote.
Odds of the top prize
1 in 8,060,598
One standard game. Two games doubles it — and it's still tiny.
How long are these odds? Winning the top prize is about as likely as calling 22.9 coin flips in a row correctly (222.9 ≈ 8,060,598). If you bought one line every draw, at two draws a week you would expect one top-prize win roughly every 77,506 years.
Last verified: 2026-08-29