How to Roll Dice Online
- Choose how many dice to roll (1–6).
- Pick the die type — d6 for board games, or the full polyhedral set (d4–d20, d100) for RPGs.
- Click Roll Dice. The dice tumble with animation, then show each result and the total.
The history strip records your recent totals so you can track a whole game session.
Dice Types Explained
| Die | Sides | Common uses |
|---|---|---|
| d4 | 4 | Small RPG damage rolls (daggers, magic missile) |
| d6 | 6 | Board games, craps, standard six-sided die |
| d8 | 8 | RPG weapon damage (longswords, battleaxes) |
| d10 | 10 | Percentile tens, World of Darkness games |
| d12 | 12 | Barbarian hit dice, greataxe damage |
| d20 | 20 | Attack rolls, saving throws, skill checks in D&D |
| d100 | 100 | Percentile rolls (roll two d10s or one d100) |
Great Uses for a Dice Roller
- Tabletop RPGs: play D&D or Pathfinder when someone forgot their dice bag — or when playing online.
- Board game nights: lost the dice from the box? Your phone is the replacement.
- Classrooms: roll for math games, probability lessons, or random question selection.
- Decision making: assign outcomes to numbers and let the dice choose among many options.
- Probability demos: roll 2d6 fifty times and watch the totals cluster around 7 — the central limit theorem in action.
Fun Probability Facts
- A natural 20 on a d20 has exactly a 5% chance — it feels rarer because we remember the dramatic ones.
- With 2d6, 7 is the most common total (6 of 36 combinations); 2 and 12 are the rarest (1 each).
- Advantage in D&D (roll 2d20, take the higher) raises your average from 10.5 to about 13.8 — roughly equivalent to a +3 bonus.
- Digital dice are fairer than cheap physical dice, which often have tiny manufacturing biases from uneven paint or rounded corners.
How to Roll a D20 Online
Need to roll a d20 online? Select "d20 (20 sides)" in the Die type dropdown above and click Roll Dice. The tool generates a random number from 1 to 20 with a tumbling animation — the digital equivalent of the iconic twenty-sided die used for attack rolls, saving throws, and skill checks in Dungeons & Dragons.
A few d20-specific tips:
- Rolling with advantage or disadvantage (D&D 5e): set the die type to d20, number of dice to 2, roll once, and take the higher (advantage) or lower (disadvantage) of the two results shown.
- Critical hits: a natural 20 (all dice showing 20) is an automatic success in most D&D rules — a 5% chance per roll.
- Percentile rolls: switch to d100 for a 1–100 result, the standard for percentile checks.
- Initiative order: roll one d20 per combatant and sort the totals highest-first — the history strip keeps every roll visible.
Because each roll is an independent uniform random number, this roller is statistically fairer than many cheap physical dice, which can develop subtle biases from uneven manufacturing.
Frequently Asked Questions
What do d4, d6, d8, d10, d12, and d20 mean?
The "d" stands for die, and the number is how many sides it has. A d6 is a normal six-sided die, a d20 has twenty sides, and so on. Rolling a d20 means generating a random number from 1 to 20.
How many dice can I roll at once?
Up to 6 dice per roll. The tool shows each die's result and the total automatically.
Are the dice rolls truly random?
Yes. Each die is an independent uniform random number from 1 to the number of sides, generated by your browser. No physical bias, no patterns.
Can I use this for Dungeons & Dragons?
Absolutely. The roller covers the full polyhedral set used in D&D and other tabletop RPGs: d4, d6, d8, d10, d12, and d20, plus a d100 for percentile rolls.
How do I roll a d20 online?
Choose "d20 (20 sides)" in the Die type dropdown above and click Roll Dice. You will get a random number from 1 to 20 — perfect for D&D attack rolls, saving throws, and skill checks.
Does the dice roller work on mobile?
Yes. The roller and its animation work in any modern mobile or desktop browser, making it handy when physical dice are not around.