Skip to main content
Book Consultation →
Numbers and dice100% FreeInstant

Dice Roller: Roll d4, d6, d8, d10, d12, d20 and d100

This free online dice roller rolls up to 100 dice at once. Choose the type of die, add a modifier and read each roll and the total. It also understands dice notation such as 2d6+3.

By Debmedia Technologies LLP · Kolkata, India · Updated

What Is It and When Do You Need It?

A dice roller replaces a handful of physical dice with a fair digital roll. It is handy when you lost the dice, are playing online, or need many dice at once, such as 8d6 for a fireball.

Type dice notation or fill in the boxes. You see each die and the total.

How to Use This Tool

  1. Type notation such as 2d6+3, or choose a number and type of dice.
  2. Add a modifier if you need one.
  3. Press Roll.
  4. Read each die and the total.

How the Calculation Works

Each die is an unbiased random integer from 1 to the number of sides. The total is the sum of the dice plus the modifier. Notation is read as count d sides, then an optional plus or minus number.

Worked Example

Rolling 2d6+3 might give 4 and 5 plus 3 for a total of 12. Rolling a d20 gives a number from 1 to 20 with a 5% chance for each.

Common Uses

  • Tabletop role-playing games.
  • Board games.
  • Probability lessons.
  • Quick decisions.

Tips and Common Mistakes

  • Two dice are not uniform: 7 is the most likely total of 2d6.
  • Use d100 for percentage rolls.
  • Notation overrides the boxes.

Next, you may need the coin flip, random number generator, magic 8 ball, lottery number generator.

Everything runs in your browser. Nothing you type is uploaded, stored or sent to any outside service.

Frequently Asked Questions

A short way of writing a roll. 2d6+3 means roll two six-sided dice and add 3. d20 means one twenty-sided die.
Yes. Each face has exactly the same chance, using unbiased random numbers from your browser’s secure source.
Board games, tabletop role-playing games such as Dungeons and Dragons, classroom probability and quick decisions.
Up to 100 dice at a time.

Disclaimer: results are calculated in your browser from the numbers you enter. Check important results before you rely on them for money, health, safety or legal decisions.