Dice Roller

Virtual 3D dice rolling simulator

How to Use Dice Roller

  1. Enter how many dice to roll, from 1 to 100.
  2. Choose the die: D4, D6, D8, D10, D12, D20 or D100.
  3. Click Roll Dice. You'll see the total at the top and every die on its own underneath.
  4. Click again for the next roll. Nothing is saved between rolls.

Are the rolls fair?

Yes. Each die uses crypto.getRandomValues(), the random number generator browsers provide for security work, rather than the quicker but weaker Math.random(). The code also throws away the few raw values that would make some faces very slightly more likely than others, so on a d6 every face comes up one time in six over the long run.

Fair doesn't mean evenly spread in the short term, though. Three 1s in a row on a d20 feels rigged, but it happens about once in every 8,000 sets of three rolls. Streaks are normal.

Reading dice notation

Tabletop games write dice as NdX, where N is how many dice and X is how many sides. 2d6 means two six-sided dice added together, and 1d20 is a single twenty-sided die. To roll 4d6, set the number of dice to 4 and the die to D6.

The total is the plain sum of every die. If your game adds a modifier (1d20+5, say) or tells you to drop the lowest die, do that last step yourself using the individual results shown under the total.

Why 7 is the most common roll with two dice

Two d6 can land in 36 equally likely combinations, and six of those add up to 7, more than any other total. That's why 7 comes up so often in Monopoly and Catan, while 2 and 12 each turn up only once in 36 rolls on average. Rolling a few dozen times here is a quick way to show the pattern in a classroom.

Key Features & Practical Use Cases

  • Playing Dungeons & Dragons or another tabletop RPG when your physical dice have gone missing.
  • Board games like Monopoly or Ludo when the dice are under the sofa again.
  • Rolling 4d6 for character stats and reading off each die so you can drop the lowest.
  • Showing students how dice totals bunch up in the middle as you roll more of them.

Frequently Asked Questions

What does d20 mean?

A die with 20 sides, numbered 1 to 20. It's the main die in Dungeons & Dragons, used for attack rolls and skill checks.

Can I add a modifier like +5?

Not automatically. Roll, then add the modifier to the total yourself.

Is a D100 the same as rolling two D10s?

It gives the same range, 1 to 100, with every number equally likely. Many groups roll two d10s for tens and units because a real 100-sided die is hard to read. Here it's a single roll.

Can I roll different dice together, like a d20 and a d6?

Not in one go. Roll each type separately and add the totals.

Is there a limit on how many dice I can roll?

100 per roll, which covers even the biggest damage rolls in most games.

About OneClickly

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