Oz Lotto odds
Oz Lotto is the Tuesday night game with the bigger jackpots, and the longer odds that come with them. Since May 2022 it has been a 7-from-47 game with three supplementary numbers.
How the Oz Lotto draw works
Ten balls are drawn from a barrel numbered 1 to 47. The first seven are the winning numbers and the last three are supplementary numbers. You pick seven numbers per game. Supps decide Divisions 2, 4 and 7; Division 6 (four winning numbers) pays with or without them.
Oz Lotto odds for every division
| Div | To win | Winning combinations | Combinations | Odds (1 game) |
|---|---|---|---|---|
| 1 | All 7 winning numbers | C(7,7) | 1 | 1 in 62,891,499 |
| 2 | 6 winning numbers + 1 supp | C(7,6) × C(3,1) | 21 | 1 in 2,994,833 |
| 3 | 6 winning numbers, no supp | C(7,6) × C(37,1) | 259 | 1 in 242,824 |
| 4 | 5 winning numbers + 1 or more supp | C(7,5) × [C(40,2) − C(37,2)] | 2,394 | 1 in 26,270 |
| 5 | 5 winning numbers, no supp | C(7,5) × C(37,2) | 13,986 | 1 in 4,497 |
| 6 | 4 winning numbers (supps don't matter) | C(7,4) × C(40,3) | 345,800 | 1 in 182 |
| 7 | 3 winning numbers + 1 or more supp | C(7,3) × [C(40,4) − C(37,4)] | 887,075 | 1 in 70.9 |
| Any prize | 1,249,536 | 1 in 50.3 |
Out of 62,891,499 equally likely outcomes for one standard game. C(n,k) is “n choose k”, the number of ways to choose k items from n. Each game line only wins its highest division.
Where these numbers come from
Division 1. Every set of 7 numbers from 47 is equally likely, so the odds are simply the number of possible sets: C(47,7) = 47! ÷ (7! × 40!) = 62,891,499.
A supp division. For Division 2 (6 winning numbers + 1 supp) your game needs 6 of the 7 winning numbers, which can happen C(7,6) = 7 ways. The remaining 1 number must include at least one of the 3 supps. With one slot left that's just C(3,1) = 3 choices, giving 21 combinations, or 1 in 2,994,833.
Before the 2022 change Oz Lotto was 7 from 45, giving Division 1 odds of C(45,7) = 45,379,620. Adding two balls to the barrel pushed that out to 62,891,499, about 39% longer. The third supp and the 3 + supp division were added in the same change, which is why the any-prize odds actually improved.
Oz Lotto system entries
A system lets you mark more than 7 numbers and plays every standard game that can be made from them. A System 9 covers C(9,7) = 36 games, so its Division 1 odds are exactly 36 times better than a single game. It also costs 36 times as much.
| Entry | Games covered | Division 1 | Any prize |
|---|---|---|---|
| Standard game | 1 | 1 in 62,891,499 | 1 in 50.3 |
| System 8 | 8 | 1 in 7,861,437 | 1 in 28.1 |
| System 9 | 36 | 1 in 1,746,986 | 1 in 17.5 |
| System 10 | 120 | 1 in 524,096 | 1 in 11.7 |
| System 11 | 330 | 1 in 190,580 | 1 in 8.4 |
| System 12 | 792 | 1 in 79,408 | 1 in 6.3 |
| System 15 | 6,435 | 1 in 9,773 | 1 in 3.2 |
| System 20 | 77,520 | 1 in 811 | 1 in 1.7 |
A system doesn't change the value you get per dollar. You win the same number of games on average as you would from the same number of separate entries. What changes is how the wins are spread: because the games overlap, wins arrive in clusters. When a system hits, it usually pays several divisions at once. Pick a system size in the calculator, then use What would this system pay? to see the winning games for any result.
Oz Lotto questions
- What are the odds of winning Oz Lotto Division 1?
- 1 in 62,891,499 for one standard game: the number of different 7-number combinations from 47.
- Why does Oz Lotto have three supplementary numbers?
- The 2022 game change added a third supp alongside the bigger barrel, so lower-division prizes are more common even though the jackpot is harder to win.
- Do some numbers come up more often?
- Over a short run, yes, some numbers will have appeared more than others. That is ordinary randomness. The balls have no memory, and every combination is exactly as likely as any other in the next draw.
- Does playing the same numbers every week help?
- No. Your chance each draw is the same whether you keep your numbers or change them. Picking less popular numbers (avoid birthdays, patterns and 1-2-3-4-5-6) won't make you more likely to win, but it may mean sharing a jackpot with fewer people.
- Are the odds the same in every state?
- Yes. These are national draws, so the numbers, divisions and odds are the same whichever state you buy in. Prize amounts per division vary from draw to draw depending on sales and the number of winners.
Odds are calculated from the game rules (7 from 47, 7 winning numbers and 3 supps, drawn Tuesday) and checked against the operator's published odds in November 2026. Published figures are rounded, so the last digit can differ by one. Always check the official rules before you play.