Oz Lotto: Main Numbers Versus Supplementary Balls
The reviewed base game selects seven numbers from 47. The operator draws seven winning numbers and three supplementary numbers. Players do not select a second three-number supplementary pool.
- Review jurisdiction
- Australia; operator source reviewed for Western Australia
- Base number format
- 7 from 47. No separately selected bonus pool.
- Official jackpot odds
- 1 in 62,891,499
- Draw days
- Tuesday
- Base price
- Not available — not verified
- Price scope
- Not verified
- Last reviewed
How the jackpot odds are calculated
C(47,7) = 62,891,499. With uniform unordered selections and independent separate pools where applicable, one exact ticket has probability 1/62,891,499. The exact BigInt count matches the reviewed official jackpot denominator.
Static result: 1 in 62,891,499; official match.
Do supplementary balls multiply jackpot outcomes?
No. The jackpot match is the seven winning numbers, so the denominator is C(47,7)=62,891,499. A multiplication by a supplementary-ball count would model a different ticket. Supplementary numbers matter for some lower prize divisions, whose probabilities require their own model.
The old LottoFlick jackpot denominator was 45,379,620, which did not match its seven-from-47 configuration. The independent count and operator table agree on 62,891,499. The draw-only supplementary count was also corrected from two to three. Those corrections are recorded in the verification report.
The Western Australian operator source supports Tuesday drawings. A current base price was not verified, so the Explorer shows that gap rather than reusing a price from another jurisdiction.
Oz Lotto: the numbers behind the odds
- Ticket format
- 7 of 47
- Calculated vs official odds
- Calculated 1 in 62,891,499 (≈ 1.590 × 10^-8). Official 1 in 62,891,499 (OZ Lotto game information, reviewed 2026-10-04). Equal.
- Official odds of any prize
- 1 in 51 (OZ Lotto game information, reviewed 2026-10-04). Published approximate figure for winning a prize of any tier, not the jackpot chance.
- 1,000 distinct tickets
- cover 1,000 of 62,891,499 outcomes (about 1 in 62,891); duplicates add nothing.
- One-number neighbours
- 280 tickets (7 × 40: choose which of your 7 main numbers to replace, and which of the 40 unused numbers replaces it) differ from yours in exactly one main number, other pools unchanged. With yours they cover 281 of 62,891,499 outcomes (about 1 in 223,813). This counts ticket combinations; a different ticket is not a likelier one.
- One fixed ticket, 1,000,000 independent draws
- expected jackpot hits 0.0159 (1,000,000 ÷ 62,891,499); chance of at least one hit 1.58% (1 − (1 − 1/62,891,499)^1,000,000). Exact calculation, not a played or simulated result.
Calculated values assume equally likely combinations, drawing without replacement and independent pools; prizes, taxes, ticket costs and rule changes are not modelled. None of this predicts real draws or recommends buying tickets.
Combination calculator · Lottery Explorer · Probability · Methodology · Sources
Game guides: Powerball · Mega Millions · Eurojackpot · Lotto 6/45
What understanding the odds can and cannot do
Balanced selections, birthdays and past draw frequencies do not improve the jackpot chance of a particular valid ticket. LottoFlick does not predict winning numbers. Use the combination calculator to explore models and the Explorer to compare field scopes.
Official evidence and limits
- OZ Lotto game information — Lotterywest; verified fields: name, country, jurisdiction, mainPick, mainPool, drawOnlyBonus, drawSchedule, jackpotOdds, overallOdds; reviewed 2026-10-04.
Verified status applies to the stated base format and sourced fields. Claim deadlines, taxes, additional products and live jackpot amounts are not verified here. Check the responsible operator before purchasing or claiming a ticket.
Open this game in the Lottery Lab: rules, simulation and coverage