What are pegs in plinko?
Pegs are the dots the ball ricochets between as it falls. Mathematically, each row of pegs is one independent coin flip: the ball deflects left or right with equal probability, and the sequence of deflections determines its final bin.
A board with 16 rows therefore produces a 16-flip path, and counting how many flips went right tells you which of the 17 bins catches the ball. The pegs are what turn a simple falling ball into a binomial experiment, which is why every plinko probability reduces to clean coin-flip arithmetic.
How many pegs are on a plinko board?
On the standard layout the four sites we track use, the top row holds 3 pegs and every row below adds one. An 8-row board stacks rows of 3 through 10 for 52 pegs; a 16-row board runs 3 through 18 for 168.
The triangle shape is not decoration. Widening by exactly one peg per row is what keeps every deflection a clean two-way choice and funnels the ball into precisely rows-plus-one landing slots. Slide the rows control from 8 up to 16 and you can watch the pyramid grow from 52 pegs to 168 in our plinko simulator, with the bin strip widening to match.
Do the pegs actually decide where the ball lands?
Not in crypto plinko. The landing bin is computed from provably fair seeds before the animation begins; the ball then bounces peg to peg along that predetermined path. The physics you watch is a visualization, not the randomness source.
This surprises players coming from the TV version, where real gravity did the deciding. Online, the provably fair system generates one left/right value per row and the renderer simply walks the ball through the matching pegs. That design is a feature: because no physics engine is involved, you can recompute any drop from its seeds and confirm the game never improvised.
See the peg pyramid in motion
Drop free play-money balls on any board from 8 to 16 rows and watch how the peg count reshapes every path.
Open the Plinko Simulator