Dice Probability Lab

Roll a handful of dice over and over. The bars are what actually happened; the line is what the math says should happen. Keep rolling and the bars climb onto the line.

250 rolls

Controls

How many dice

Roll them

tip: hit ×1000 a few times and watch
the gap collapse. then try 1 die, and 6.

The roll

7

SUM

Rolls: —
Average sum: —
Most common: —
Biggest gap: —

Sums · observed vs theory

observed theory

Gap shrinking as rolls pile up

log scale · goal ≤ 1.00 pp

Expected vs observed

Every possible sum with the number of dice combinations that make it, the theoretical share of rolls, the observed share, and the gap between them.
Sum	Ways	Theory	Observed	Gap