Galton Board
Left or right at every peg: compare the growing pile with its predicted shape.
0 landed · 0 falling
Bins count right turns; bar heights show fractions. Dashed line: theory.
An educational simplified model: each turn is independent. This is a probability model, not a physical simulation of collisions or speed. Visible balls are counted when they land. Batches animate up to 48 balls, then add the remaining samples in bulk.
Counts by bin
- 0: 0 / 0 (theory 0.4%)
- 1: 0 / 0 (theory 3.1%)
- 2: 0 / 0 (theory 10.9%)
- 3: 0 / 0 (theory 21.9%)
- 4: 0 / 0 (theory 27.3%)
- 5: 0 / 0 (theory 21.9%)
- 6: 0 / 0 (theory 10.9%)
- 7: 0 / 0 (theory 3.1%)
- 8: 0 / 0 (theory 0.4%)
How to play
Try once to follow a ball’s path. Adjust the rows, batch size, and chance of going right, then run a batch. Bars show observed fractions; the dashed line shows theory. Changing rows or probability resets the results.
Learn more
An educational simplified model: each turn is independent. This is a probability model, not a physical simulation of collisions or speed. Visible balls are counted when they land. Batches animate up to 48 balls, then add the remaining samples in bulk.