Plinko is an instant game in which a ball drops through a triangle of pegs and lands in one of the slots at the bottom. Each slot has a multiplier, and your payout is the stake times that multiplier. Online versions let you choose the number of rows (commonly 8 to 16) and a risk level (low, medium, high). The centre slots pay little, often less than the stake, and the edge slots pay the most but are hit very rarely.

This page is part of our crash games guide, which also covers Mines and Dice.

The Odds: A Binomial Distribution

At every peg, the ball goes left or right with a 50% chance. With n rows there are n + 1 slots, and the chance of landing in slot k is C(n, k) / 2 to the power of n. This means the centre is far more likely than the edges.

8 rows (9 slots, 256 equally likely paths)

Slot (from edge)	Paths	Probability
Edge (each side)	1	0.39% (1 in 256)
2nd	8	3.13%
3rd	28	10.94%
4th	56	21.88%
Centre	70	27.34%

16 rows (17 slots, 65,536 equally likely paths)

Slot (from edge)	Paths	Probability
Edge (each side)	1	0.0015% (1 in 65,536)
2nd	16	0.024%
3rd	120	0.18%
4th	560	0.85%
5th	1,820	2.78%
6th	4,368	6.67%
7th	8,008	12.22%
8th	11,440	17.46%
Centre	12,870	19.64%

On 16 rows, about 55% of balls land in the three central slots, while a ball reaches either edge only about once in 32,768 drops.

How Multipliers Set the RTP

RTP = the sum of (probability of each slot x its multiplier). An example set of multipliers on 8 rows shows how this works:

Slot	Probability	Example low-risk multiplier	Example high-risk multiplier
Edge (x2)	0.39% each	5.6x	29x
2nd (x2)	3.13% each	2.1x	4x
3rd (x2)	10.94% each	1.1x	1.5x
4th (x2)	21.88% each	1x	0.3x
Centre	27.34%	0.5x	0.2x
RTP		98.98%	99.06%

The two columns return almost the same on average, but they feel very different. In the low-risk example, about 73% of balls return 1x or more. In the high-risk example, about 71% of balls return 0.3x or less, and the result depends on rare edge hits. The multipliers in real games differ by provider; the in-game paytable shows them for each row and risk setting.

Rows and Risk: What Changes

Setting	Effect on maximum multiplier	Effect on frequency of large wins	Effect on house edge
More rows	Higher	Rarer	About the same
Higher risk	Higher edges, lower centre	Same rarity, bigger gap	About the same
Fewer rows, low risk	Lowest maximum	Most frequent near-stake returns	About the same

Speed and Turnover

Plinko rounds take a second or two, and many games allow auto-drop of dozens of balls. At A$1 per ball and 20 balls a minute, that is A$1,200 of turnover per hour. With a 1% house edge the expected loss is about A$12 per hour; with 3%, about A$36. Variance on high-risk settings is much larger than either figure suggests. The same turnover logic is explained for pokies in RTP explained.

Provably Fair Plinko

Most Plinko games from crypto-focused studios are provably fair: the result for each ball is generated from a server seed (hashed before play), a client seed you can change, and a nonce that counts your bets. After you rotate the seed, you can verify every past drop. See provably fair for the procedure. Verification proves results were not changed; it does not change the odds.

Plinko Compared With Other Instant Games

Game	Your decision	When the result is fixed	Typical RTP range	What sets variance
Plinko	Rows and risk before the drop	Before the ball falls	about 96% to 99%	Rows and risk level
Mines	Mines count and when to cash out	Layout fixed before the first pick	about 97% to 99%	Mines count and picks
Dice	Win chance before the roll	At the roll	about 97% to 99%	Win chance
Crash games	Cash-out target	Before the round starts	about 97% (Aviator)	Cash-out target

Plinko is the only one of the four where you make no decision once the round starts. That makes it the most passive format, and with auto-drop, the fastest to turn over a budget.

A 100-Ball Session on 8 Rows

Using the example low-risk table above at A$1 per ball, the expected outcome of 100 drops is roughly: 27 centre hits (A$13.50 back), 44 fourth-slot hits (A$44), 22 third-slot hits (A$24.20), 6 second-slot hits (A$12.60) and less than one edge hit. That totals about A$94 to A$100 back from A$100, depending on whether an edge ball lands. Real sessions vary around this, and on high-risk settings the spread is much wider, because one edge hit at 29x outweighs dozens of 0.2x results.

Practical Notes

1. Check the RTP and the multiplier table for your chosen rows and risk in the game info.
2. Treat high-risk 16-row settings as lottery-style: most drops return a fraction of the stake.
3. Limit auto-drop. Set a number of balls and a loss limit before starting.
4. Expect Plinko to be excluded or reduced in bonus wagering; see game weighting.
5. For a game with a similar risk choice and visible probabilities, compare Dice.

Plinko versions are offered by several instant-game studios, including Spribe and BGaming. Casinos with large instant-game sections are often crypto-focused; see crypto casinos.

Frequently Asked Questions

Gambling is for adults 18+ and should stay within a budget you can afford to lose. Free, confidential support is available 24/7 from Gambling Help Online on 1800 858 858.