Skip to content
toolwise

Dice Roller

Roll one or more virtual dice of any type.

Dice type

Examples: 3d6, d20+5, 2d8+1d4−1. Up to 100 dice with 2 to 1,000 sides.

Total

–

When to use it

Use this dice roller for board games when the dice are lost, tabletop role-playing games like Dungeons & Dragons, classroom probability lessons, or any time you need a random number in a fair, familiar way. It handles everything from a single d6 to complex rolls with modifiers.

How to use it

  1. Choose the Dice type: d4, d6, d8, d10, d12, d20 or d100.
  2. Set How many with − and +.
  3. Or type a roll in Or type dice notation, such as 3d6, d20+5 or 2d8+1d4−1.
  4. Press Roll dice.
  5. Read the Total and the breakdown of each die. Earlier results appear under Recent rolls. Press Clear to empty the list.

Worked example

In a role-playing game, your character attacks with a +5 bonus. Type d20+5 and press Roll dice. The die shows 11, so the total is 16, shown as 1d20 (11) + 5. If the enemy’s armour class is 15, the attack hits.

The attack then does damage of 2d6+3. Type that and roll: perhaps 4 and 6 for 10, plus 3, for 13 damage. Recent rolls keeps both results, so the group can check them.

For a board game that needs two normal dice, leave the default of 2d6 and press Roll dice each turn.

Probability with dice

  • With one d6, each number has a 1 in 6 chance.
  • With 2d6, totals are not equally likely. 7 is the most common, with 6 ways to make it out of 36, while 2 and 12 have only 1 way each.
  • With more dice, totals cluster more tightly around the middle.

Roll 2d6 many times in class and tally the totals to see this pattern appear.

Tips

  • Write rolls in notation. It is quicker than changing the dice type and count each time.
  • Use Recent rolls to settle disputes. Everyone can see the result and the breakdown.
  • Use the right die for the rule. Many games use d20 for checks and smaller dice for damage.
  • Keep it on a tablet in the middle of the table. Everyone can tap to roll and see the result.

Keyboard and screen readers

The Roll dice button works with Enter, and each result is announced, so the roller is easy to use without a mouse.

Common mistakes

  • Typing the modifier in the wrong place. Use d20+5, not 5+d20, for clarity, although both work the same.
  • Confusing 2d6 with d12. Both go up to 12, but 2d6 gives middle totals much more often.

Frequently asked questions

What does 2d6 mean?

It is dice notation. The first number is how many dice, d means dice, and the second number is how many sides. So 2d6 means roll two six-sided dice and add them. d20+5 means roll one 20-sided die and add 5.

Are the rolls fair?

Yes. Each die uses your browser's cryptographic random number generator, so every side has exactly the same chance. Results do not depend on earlier rolls.

Can I mix different dice?

Yes. Type something like 2d8+1d4−1 to roll two eight-sided dice and one four-sided die, then subtract 1. The result shows each part.

What is a d100?

A 100-sided die, often used for percentages in tabletop games. It gives a number from 1 to 100.

How many dice can I roll?

Up to 100 dice at once, each with 2 to 1,000 sides.

Related tools