How to use it
When the page opens, 5 games (A–E) are already generated. Each game shows 6 different numbers from 1 to 45, sorted from smallest to largest. Press “Regenerate” to get new numbers. Use “Copy” on a row to copy one game, or “Copy all” to copy every game as text like “A: 3, 12, 19, 27, 33, 41”. Under “Number of games,” you can choose 1 to 5 games.
Open “Number rules (optional)” to enter numbers to always include (up to 5) and numbers to leave out, separated by commas or spaces. Included numbers go into every game, and the remaining spots are filled at random from the numbers that aren’t left out. If you put the same number in both fields, or leave out so many that 6 can’t be filled, you’ll see an error.
Lotto 6/45 rules
Lotto 6/45 is Korea’s lottery, run by Dong Hang Lottery. You choose 6 numbers from 1 to 45, and your prize tier depends on how many match the numbers drawn. Each game costs 1,000 won, and the draw takes place every Saturday at around 8:35 p.m. Korea Standard Time. The draw picks 6 winning numbers and then one more bonus number. According to Dong Hang Lottery, 50% of sales goes to prizes.
Prize conditions and odds by tier
For prizes 3–5, the odds denominators are rounded to whole numbers.
The table below follows Dong Hang Lottery’s information (checked October 17, 2026). First- to third-prize amounts aren’t fixed: they depend on that draw’s sales, and winners in the same tier split the amount.
| Tier | Condition | Prize | Odds (per game) |
|---|---|---|---|
| 1st | Match all 6 numbers | 75% of the total prize pool minus the 4th and 5th prize amounts | 1 in 8,145,060 |
| 2nd | Match 5 numbers + the bonus number | 12.5% of that amount | 1 in 1,357,510 |
| 3rd | Match 5 numbers | 12.5% of that amount | 1 in 35,724 |
| 4th | Match 4 numbers | 50,000 won | 1 in 733 |
| 5th | Match 3 numbers | 5,000 won | 1 in 45 |
How the first-prize odds are calculated
The number of ways to choose 6 of 45 numbers regardless of order is the combination C(45, 6). Divide 45 × 44 × 43 × 42 × 41 × 40 by 6 × 5 × 4 × 3 × 2 × 1 and you get 8,145,060. Only one of those combinations matches the winning numbers, so the first-prize odds are 1 in 8,145,060. The same method gives 6 combinations for second prize (6 ways to pick the 5 matching numbers × 1 bonus number), 228 for third prize (6 ways × the 38 numbers other than the bonus), 11,115 for fourth prize, and 182,780 for fifth prize, which produces the odds in the table above.
Ball colors
The ball colors follow the scheme Dong Hang Lottery uses to show winning numbers: 1–10 yellow, 11–20 blue, 21–30 red, 31–40 gray, and 41–45 green. The colors are only decoration to make ranges easier to spot; every number is always written out.
Age limit and playing responsibly
Under Article 5(3) of the Lottery Tickets and Lottery Fund Act, sellers must check the buyer’s age and may not sell lottery tickets to minors as defined by the Youth Protection Act (under 19, except those who have reached January 1 of the year they turn 19). Only play Lotto for fun, and only with small amounts. If you find yourself buying more to win back losses, dipping into living expenses, or struggling to stop, contact the Korea Problem Gambling Agency helpline. Dial 1336 with no area code (free); it’s open 9 a.m. to 10 p.m., 365 days a year.