UK Lottery Odds Calculator | Combinations & Line Cost
Calculate how many combinations are possible for supported UK lottery games, estimate the top-prize chance for your own number of unique lines, and see how repeated planned lines reduce useful coverage.
Last reviewed: June 2026
Fewest combinations
Thunderball
8,060,598 full top-prize combinations.
Largest combination pool
EuroMillions
139,838,160 full top-prize combinations.
UK Lotto format
Two Lotto rounds
The same entered line has two top-prize chances in a current draw.
Key rule
Unique lines matter
Repeated extra lines do not cover more combinations.
Line prices used
Estimated ticket cost
Lotto £2, EuroMillions £2.50, Set For Life £1.50 and Thunderball £1 per line.
Calculate your chance by number of unique lines
Choose a supported game and enter any number of different lines to estimate the approximate chance of matching the full top-prize combination and the ticket cost if those lines were entered through official channels.
The result is for the full top-prize combination only. It is not the chance of winning any smaller prize. Ticket costs are estimates for planning; Lottery-Checker does not sell tickets or enter draws.
Repeated line impact calculator
If one planned line appears more than once, the useful coverage is based on unique lines, not total entries. Enter the size of the repeated group: for A, A and B, the repeated group size is 2 and the useful coverage is 2 unique lines.
Combination totals by game
UK Lotto
45,057,474 possible 6-number combinations per result round.
6 main numbers from 1 to 59. The current Lotto draw has two rounds, each with its own Bonus Ball.
Estimated line price: £2.00.
EuroMillions
139,838,160 possible top-prize combinations.
5 numbers from 1 to 50 + 2 Lucky Stars from 1 to 12.
Estimated line price: £2.50.
Set For Life
15,339,390 possible top-prize combinations.
5 numbers from 1 to 47 + 1 Life Ball from 1 to 10.
Estimated line price: £1.50.
Thunderball
8,060,598 possible top-prize combinations.
5 numbers from 1 to 39 + 1 Thunderball from 1 to 14.
Estimated line price: £1.00.
Which supported lottery has the fewest top-prize combinations?
Among the supported games on this page, Thunderball has the fewest full top-prize combinations at 8,060,598. Set For Life has 15,339,390, UK Lotto has 45,057,474 possible six-number combinations per result round, and EuroMillions has 139,838,160.
A smaller combination total means the full top-prize combination is less rare mathematically, but it does not mean a player is likely to win or that the game is better value. Prize structures, ticket cost and official rules are separate issues.
Top-prize chance by number of unique lines
The table assumes every line is unique in the same draw. This is the important part for groups of players: if two players choose the same line, the second copy is only a repeated extra line and does not cover another combination.
For UK Lotto, 45,057,474 is the number of possible six-main-number combinations in one result round. Under the current two-round format, the same entered line is checked against two separate sets of winning numbers in each draw.
| Game | Number selection | Combination formula | Total combinations | Line price | 1 unique line | 7 unique lines | 14 unique lines | 21 unique lines |
|---|---|---|---|---|---|---|---|---|
| UK Lotto | 6 numbers from 1 to 59 | C(59,6) | 45,057,474 per result round |
£2.00 | 0.00000444% about 1 in 22,528,737 | 0.0000311% about 1 in 3,218,391 | 0.0000621% about 1 in 1,609,196 | 0.0000932% about 1 in 1,072,797 |
| EuroMillions | 5 numbers from 1 to 50 + 2 Lucky Stars from 1 to 12 | C(50,5) × C(12,2) | 139,838,160 | £2.50 | 0.000000715% 1 in 139,838,160 | 0.00000501% 1 in 19,976,880 | 0.0000100% 1 in 9,988,440 | 0.0000150% 1 in 6,658,960 |
| Set For Life | 5 numbers from 1 to 47 + 1 Life Ball from 1 to 10 | C(47,5) × 10 | 15,339,390 | £1.50 | 0.00000652% 1 in 15,339,390 | 0.0000456% 1 in 2,191,341 | 0.0000913% 1 in 1,095,671 | 0.0001369% 1 in 730,447 |
| Thunderball | 5 numbers from 1 to 39 + 1 Thunderball from 1 to 14 | C(39,5) × 14 | 8,060,598 | £1.00 | 0.0000124% 1 in 8,060,598 | 0.0000868% 1 in 1,151,514 | 0.0001737% 1 in 575,757 | 0.0002605% 1 in 383,838 |
How the percentages are calculated
For one-round games, the chance of matching the top-prize combination with unique lines is:
number of unique lines ÷ total combinations × 100
For the current two-round UK Lotto format, the draw-level chance is:
1 - (1 - unique lines ÷ 45,057,474)²
Example: UK Lotto has 45,057,474 possible combinations per result round. With 7 unique lines and two rounds, the top-prize chance is about 0.0000311%, or about 1 in 3,218,391.
Why unique lines matter between players
Lottery-Checker cannot improve the official odds of any lottery line. What it can do is help players organise planned lines and reduce accidental duplication inside the shared planner.
If 21 planned entries contain one repeated group of 6 matching entries, that group contributes only 1 unique line, so the useful coverage is 16 unique combinations. The percentages in the table only apply to the number of unique lines actually covered, not the number of repeated planned entries.
If a combination is already marked as used here, another player can choose a different line and cover a different combination instead of repeating the same one.
Check official rules before playing
Lottery game rules, number ranges and prize structures can change. This page is designed as a planning guide only. Before buying any real ticket, always check the latest official rules and draw information from the official lottery operator.
Responsible use
Lottery games are chance-based. More unique lines cover more combinations, but the top-prize chance remains very small. Only play if you are 18 or over, only spend what you can afford to lose, and always use official authorised channels for real tickets and official results.
Related pages
Keep moving: open a checker, compare one game in detail, or read why repeated planned lines reduce useful coverage.
Frequently asked questions
How many UK lottery combinations are there?
The supported games on this page have these full top-prize combination totals: Thunderball has 8,060,598; Set For Life has 15,339,390; UK Lotto has 45,057,474; and EuroMillions has 139,838,160.
Are these the chances of winning any prize?
No. These are the chances of matching the full top-prize combination. Smaller prize tiers have different odds.
Why do unique lines matter between players?
If players repeat the same combination, they do not cover an extra combination. Unique lines help a group cover more different combinations.
Does 21 unique lines give 21 times the chance of 1 line?
Yes, if all 21 lines are different and entered into the same draw. The chance is still very small.
Does avoiding duplicate lines improve the odds of one ticket?
No. It does not change the odds of any individual ticket. It only helps players avoid covering the same combination twice inside their planning.
Which lottery has the fewest possible top-prize combinations?
Among the games compared on this page, Thunderball has the fewest full top-prize combinations, with 8,060,598.
Can I calculate the odds for any number of lines?
Yes. Use the calculator on this page to choose a game, enter your own number of unique lines, and compare the approximate top-prize chance.
What happens if two players choose the same line?
If two players choose the same full combination, the first copy still counts as one unique line. Only the extra repeated copy fails to add coverage.