Dice Roller

Virtual dice roller d20 online — roll d4 to d20 dice with totals and history for games. Use the free Dice Roller below — enter your values and get instant results, right in your browser. Logic: each die produces a cryptographically random integer from 1 to N (sides), uniformly distributed. Total = sum of all dice rolled. Every face has exactly 1/N probability.

How to use the Dice Roller

Lost your dice mid-game night? This virtual dice roller d20 online covers everything from board games to Dungeons & Dragons: roll any dice size from d4 to d20, roll several at once, and get the total automatically. Every roll is cryptographically random, and the history keeps your last 8 rolls so nobody can argue about what was rolled. No dice bag required, ever again.

  1. Set the Sides field to your dice type: 6 for board games, 20 for D&D.
  2. Set Count to how many dice to roll at once.
  3. Click the Roll button.
  4. Read each die value and the automatic total.
  5. Check the history panel to review your last 8 rolls.

Formula

Logic: each die produces a cryptographically random integer from 1 to N (sides), uniformly distributed. Total = sum of all dice rolled. Every face has exactly 1/N probability.

Worked example

Playing Ludo online with friends: set Sides 6, Count 1, click Roll — "4!" You move four spaces. For a D&D attack, set Sides 20, Count 2: "14 + 7 = 21" appears instantly with the total calculated. The history panel keeps your last eight rolls, settling any debate about what was actually rolled.

Frequently asked questions

Yes. It uses cryptographic randomness, giving every face an exactly equal chance — fairer than most physical dice.

Absolutely — d20 is the default. Set sides to 4, 6, 8, 10, 12 or 20 for any tabletop game.

Yes. When you roll multiple dice, the tool shows each value and the sum automatically.

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