Roll D4
One four-sided die. Each face is 25%, the average is 2.5, and with only four numbers in play, repeats arrive constantly. Five rolls cannot avoid one.
1d4 1
Press roll.
Lowest possible 1, highest 4, average 2.5.
A quarter each
Four faces, 25% apiece, average 2.5. It is the smallest standard die, and the small range is what makes it behave in ways that feel wrong.
Repeats are not a glitch, they are the maths
- Two rolls the same in a row: 25%. It happens every fourth pair.
- Three in a row the same: 6.25%, or one stretch in sixteen.
- Four rolls giving four different numbers: only 9.4%, which is 24 outcomes out of 256.
- Five rolls: a repeat is guaranteed. There are only four numbers to go round.
That last line is the point. With a d4 you are not looking at a rare coincidence when numbers double up, you are looking at the default. The average number of rolls needed before all four faces have appeared is about 8.3.
The die that will not roll
A physical d4 is a tetrahedron with no rolling face, so it lands almost where you dropped it and barely tumbles. That short, stubby motion is exactly why people reach for a page like this instead: the result here does not depend on how hard you threw it or what it landed on.
What it is used for
Dagger damage, magic missile at 1d4+1, healing potions at 2d4+2, and any four-way choice where all four options are equally fine.
The same 25% split is available as a random number from 1 to 4, and if you need two options rather than four, flip a coin. Other dice are in the dice roller.