Can I simulate a d20 for tabletop games?

Yes, set sides to 20 and number of dice to 1 for a standard d20 roll.

Dice Roller

Simulate rolling any number of dice with a configurable number of sides (like d6, d20, or custom dice for tabletop games).

Inputs

Results

Try an example

Formula

Each die produces a uniform random integer between 1 and the number of sides

The Probability Behind Coin Flips, Dice Rolls, and Team Randomization

How fair randomness is generated for coin flips, dice rolls, and random team assignment, and the probability math behind each.

Coin Flip Simulator

Flip a virtual coin, or simulate flipping many coins at once.

Random Number Generator

Generate a random integer between a minimum and maximum value.

Password Generator

Generate a strong, random password with customizable character sets.

Lorem Ipsum Generator

Generate placeholder Lorem Ipsum text for mockups and designs.

Random Letter Generator

Generate one or more random letters of the alphabet.

Random Team Generator

Split a list of names into randomly assigned teams.