Lotto Odds Calculator

Australians spent over $9 billion on lottery products in 2024. That's a lot of hope. This calculator shows you exactly what you're buying when you hand over your $20 at the newsagent, broken down by game and division so you see the full picture, not just the jackpot fantasy.

Pick your game, enter your weekly spend, and the calculator returns your odds for every division. It also compares your chances to things like lightning strikes and shark attacks, because sometimes context is the best reality check.

What $20 a week on Powerball actually costs you

A standard Powerball ticket costs $1.35 per game. So $20 gets you about 14 games per draw. Your odds of hitting Division 1 with a single game are 1 in 134,490,400. With 14 games, that improves to about 1 in 9,606,457. Still not great.

But here's where it gets interesting. Run the numbers over time: $20 a week for 30 years is $31,200 in tickets. If you'd put that $20 a week into an index fund returning 7% per year instead, you'd have about $102,000. That's real money, and nobody had to pick seven lucky numbers to get it.

None of this means you shouldn't play. A couple of dollars on a Saturday ticket is entertainment. The maths only gets uncomfortable when weekly spending climbs and expectations stay unrealistic.

Getting the most out of this calculator

Switch between all five Australian games to compare odds. Saturday Lotto has the best Division 1 odds at roughly 1 in 8.1 million. Powerball and Oz Lotto jackpots are bigger, but your chances drop dramatically, to 1 in 134 million and 1 in 62 million respectively.

Try different spend amounts to see how many games you're actually playing. A lot of people think buying more tickets improves their odds significantly. Going from 1 game to 10 makes your chances 10 times better, sure. But 10 times better than "virtually impossible" is still "virtually impossible."

Check the lower divisions too. Your odds of winning any prize in Powerball are about 1 in 44. Division 9 (match 2 numbers plus the Powerball) pays $11.80. Not life-changing, but it keeps people coming back.

Quick odds table by game

What regular lotto spending looks like over time

People rarely think about lotto as a subscription, but that is basically what it becomes. Spend $15 a week and you are at about $780 a year. Keep going for 10 years and that is $7,800. Stretch it to 30 years and you are at $23,400 before you even talk about what that money could have done elsewhere.

That does not mean never buy a ticket. It means be honest about whether you are paying for a small entertainment hit or quietly building a very expensive habit.

Frequently asked questions

Which Australian lotto game gives the best odds of winning?

Saturday Lotto has the most favourable Division 1 odds at about 1 in 8.1 million. Monday and Wednesday Lotto share the same odds. Powerball has the worst at 1 in 134.5 million, but it also pays the biggest jackpots, which is the tradeoff.

Do "lucky" numbers or systems entries improve my chances?

Every number combination has the same probability of being drawn. System entries do improve your odds because you're covering more combinations, but you're also paying for more games. A System 8 in Powerball costs $14.40 and covers 8 games. The maths is straightforward: more games, better odds, higher cost, same expected return per dollar.

How many Australians actually win Division 1 each year?

Across all lottery games, Australia sees roughly 15 to 20 Division 1 winners per year. With about 8 million regular players, your annual chances of being one of them aren't encouraging. But somebody wins. That's the whole appeal of it.