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Classic pokies: how 3 reel games work, with the full maths of one

Classic pokies have three reels, a handful of lines and symbols you can count on one hand. That makes them the one kind of pokie whose maths you can work out on paper. Here is a real example and a full model.

Retro three reel pokie with a lever, cherries and a bell, illustrating our guide to classic pokies

Key facts

  • A classic pokie has three reels, usually one to five lines and traditional symbols such as sevens, bars, bells and cherries, with few or no bonus rounds.
  • NetEnt's Mega Joker is a classic online example: 3x3, 5 fixed lines, 99.00% RTP, 17% hit frequency and a 200x maximum payout. Jackpot 6000 lists 98.90%, 10% and 600x.
  • In our model of a three-reel, one-line game with 20 stops per reel, the return is 92.0% and 21.15% of spins win, about 1 in 4.7.
  • In that model the humble cherry pays carry 60 of the 92 cents returned per dollar; the 200x top prize carries only 2.5 cents.
  • A seven on 1 of 22 physical stops lines up 3 times in 10,648 spins once; weighted to 1 of 64 virtual stops it is 1 in 262,144, in our calculation.

What classic pokies are

Classic pokies are three-reel games with a few lines, traditional symbols and little or no bonus play. They copy the layout of the early mechanical machines. Closer to home, Aristocrat says it was founded in Sydney in the 1950s with a machine called the Clubman, and that it later created the first five-reel slot machine. Its story is in aristocrat pokies.

Classic (3 reel)Modern video pokie
Reels35 or more, sometimes grids
Ways to winOften 1 to 5 lines10 to 25+ lines, 243+ ways, clusters
SymbolsSevens, bars, bells, cherriesThemed symbols, wilds, scatters
FeaturesNone, or one simple modeFree spins, multipliers, respins, buys
Top prizeOften a few hundred times the betCan run to thousands of times the bet

Two classic pokies with published numbers

NetEnt keeps two classic-style games in its catalogue and publishes their maths:

Mega JokerJackpot 6000
Released1 October 200824 December 2007
Layout3x3, 5 fixed lines5 lines
RTP (NetEnt)99.00%98.90% ("RTP potential up to 98.9%")
Hit frequency17%10%
Max payout200x bet600x bet
Special modeSupermeter, wins capped at 2,000 coinsSupermeter, 20 coins a spin
JackpotProgressive, awarded on a random game round

Both games hide a twist behind the old-fashioned look. A win in Mega Joker's basic game moves you into the Supermeter, where you bet 20, 40, 100 or 200 coins a spin from your winnings, and NetEnt says you can move credits back to the basic game at any stage. The RTPs are among the highest published anywhere, which is why both appear in our netent pokies guide.

The hit frequencies are the surprise. Jackpot 6000 wins on only 1 spin in 10 despite a 98.90% return. Classic does not mean gentle.

The maths of a classic pokie, worked in full

Three reels and a few symbols make it possible to work out an entire game by hand. Here is a model we built: three identical reels, 20 stops each, one payline.

SymbolStops per reel
Seven1
Bar3
Bell4
Cherry4
Blank8

With 20 stops on each of three reels there are 20 x 20 x 20 = 8,000 equally likely results. The paytable and what each line is worth, in our calculation:

ResultPaysChanceShare of each $1 returned
Seven, seven, seven200x1 in 8,0002.5 cents
Bar, bar, bar40x1 in 29613.5 cents
Bell, bell, bell20x1 in 12516 cents
Cherry, cherry, cherry15x1 in 12512 cents
Cherry on reels 1 and 2 only5x3.2%16 cents
Cherry on reel 1 only2x16%32 cents
Total21.15% of spins win92.0 cents

Three things fall out of the model:

  • The RTP is 92.0%. You lose 8 cents per dollar bet on average, close to the roughly 92.1% that Australian club and hotel pokies returned in 2024-25, by our calculation from official state data.
  • About one spin in 4.7 wins, a hit frequency of 21.15%. In this model every win is at least double the bet, so no win is smaller than your stake.
  • Cherries do the heavy lifting. The three cherry pays return 60 of the 92 cents. The 200x top prize returns just 2.5 cents. Remove the sevens entirely and the game still returns 89.5%.

That last point is the shape of almost every pokie, classic or modern: frequent small prizes carry most of the return, and the headline prize is mostly decoration. To read a real game's prize list this way, see how to read a pokies paytable.

Virtual reels: why a seven is rarer than it looks

A purely mechanical reel gives every stop the same chance, so you could count your odds. A game run by a random number generator does not have to: a designer can map more virtual positions to some stops than others, making a symbol rarer than its share of the visible reel suggests. In our calculation:

How the seven is placedChance of three sevens
1 of 20 stops (our model)1 in 8,000
1 of 22 physical stops1 in 10,648
1 of 64 virtual stops per reel1 in 262,144

The reel you see could look identical in the last two rows. The second is about 25 times more likely to pay than the third. That is why counting symbols on a screen never tells you the odds, and why how do pokies work starts with the random number generator rather than the reels.

Pundit tip: a near miss on a three-reel game, two sevens and a blank, feels close. It tells you nothing about the next spin, which is drawn fresh.

Classic pokies and volatility

Small top prizes do not guarantee a smooth ride. Our model wins on 21% of spins and Mega Joker on 17%, but Jackpot 6000 wins on only 10%, which means long dry runs between wins of around 10 times the bet on average. Compare NetEnt's five-reel Dead or Alive, which wins on 30% of spins but can pay 8,600x. Our pokies volatility guide and pokies hit frequency guide take that comparison further.

Where you find 3 reel pokies in Australia

In Australia you can play pokies for real money only in licensed clubs, hotels and casinos, where state law sets the minimum return: in NSW the Gaming Machines Regulation 2019 says prizes must be at least 85% of the money played. Online, classic games like Mega Joker sit on the same sites as any other online pokie, and online pokies cannot legally be offered to people in Australia under the Interactive Gambling Act 2001. Use the pokies calculator to see what any return percentage costs at your bet and speed.

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Frequently asked questions

What are classic pokies?

Pokies built like the original mechanical machines: three reels, a small number of paylines, symbols such as sevens, bars, bells and fruit, and simple or no bonus features. Online versions keep the look but run on the same random number generator maths as any other pokie.

Do 3 reel pokies pay better than 5 reel pokies?

Not by design. The return depends on the game's RTP, not the number of reels. Some classic online games do publish high figures, such as NetEnt's Mega Joker at 99.00%, but a three-reel venue machine is held to the same state minimum as any other, at least 85% in NSW and Victoria.

Why do classic pokies have small top prizes?

With three reels and few symbols there are only so many combinations, so the maths has less room for huge rare wins. Mega Joker's top payout is 200 times the bet and Jackpot 6000's is 600 times, against 8,600 times for NetEnt's five-reel Dead or Alive.

What is a virtual reel?

A way of weighting a reel so that some symbols come up less often than their share of the physical reel suggests. In our example, a seven on 1 of 22 visible stops would line up three times once in 10,648 spins, but if it maps to 1 of 64 virtual stops it lines up once in 262,144.

What is the Supermeter in Mega Joker?

A second mode NetEnt's Mega Joker moves you into after a win in the basic game. You bet 20, 40, 100 or 200 coins a spin from the Supermeter balance, and Supermeter wins are capped at 2,000 coins.

Related reading

Sources

Official pages we relied on. If anything here has changed, tell us via the contact page and we fix it.

  1. NetEnt: Mega Joker
  2. NetEnt: Jackpot 6000
  3. NetEnt: Dead or Alive
  4. Aristocrat: About (history)
  5. NSW Gaming Machines Regulation 2019