Roll a d4
The four-sided die. Smallest of the standard polyhedral set.
Roll a d4 to see the result.
What a d4 is for
In tabletop roleplaying the d4 usually handles the smallest damage dice - daggers, darts, healing potions - and it is the die people most often lose under the sofa. Each face has a flat 25% chance. Physical d4s are notoriously hard to read, which is one of the few areas where a virtual roll is genuinely better than the real thing.
The odds
Each of the 4 faces has a flat 25.00% chance on every roll, and every roll is independent of the last. There is no "due" number - a face that has not come up in twenty rolls is exactly as likely on the twenty-first as it was on the first.
Fair, and checkable
Every roll is drawn from your browser's cryptographic random number generator using rejection sampling, so no face is even slightly favoured - which is more than can be said for most physical dice. Each roll also produces a receipt anyone can use to reproduce it. How that works.
To roll a different combination, or to add a modifier, the main dice roller takes any number of dice with any number of sides.
Other dice
- Roll a d6The ordinary cube. Every board game in the cupboard uses one.
- Roll a d8Eight faces, 12.5% each. Common for medium weapon damage.
- Roll a d10Ten faces. Used alone, or in pairs to make percentages.
- Roll a d12Twelve faces. The most under-used die in the set.
- Roll a d20The one that decides whether you hit. 5% per face.
- Roll a d100Percentile. One number in a hundred, flat odds throughout.
- Roll 2d6Two ordinary dice, totalled. The shape of most board games.
- Roll 3d6Three dice, totalled. The classic ability-score roll.
- Roll 2d10Two ten-sided dice, totalled. Range of 2 to 20 on a curve.