Dice Roller
Roll any number of dice with any number of sides and get the total.
Results update as you type.
About this calculator
A dice roller simulates rolling one or more dice and adds up the result. Choose how many dice and how many sides each has — a four-sided d4, the familiar six-sided d6, or the polyhedral d8, d10, d12, d20 and d100 used in tabletop games — and optionally add a modifier that is applied to the total. Every change rerolls the dice, so tapping any field is a fresh roll.
Worked example: rolling 2d6+3 means two six-sided dice plus a bonus of 3. If the dice come up 4 and 5 that is 9, and the modifier makes the total 12; the tool also shows each individual roll (4, 5) and the average per die (4.5).
Players use it for board games and role-playing systems like D&D when they do not have physical dice, and it doubles as a quick probability demonstration — rolling many dice shows how totals cluster around the average.
Frequently asked questions
What does 2d6 mean?
In dice notation NdS means roll N dice with S sides each. 2d6 is two six-sided dice, giving a total from 2 to 12. This roller supports common sizes from d4 up to d100.
What is the modifier for?
Tabletop games often add a fixed bonus to a roll, written like “2d6+3”. The modifier is added to the sum of the dice after they are rolled.
What is the average roll of a die?
The average of a single fair die is halfway between 1 and its highest face: 3.5 for a d6, 10.5 for a d20. Rolling several dice, the expected total is that average times the number of dice — so 3d6 averages 10.5.
Why is a total near the middle more likely with several dice?
With one die every face is equally likely, but summing several dice, middle totals can be made many ways and the extremes only one way. On 2d6 a total of 7 has six combinations while 2 and 12 have one each, so 7 comes up most often.
Can this dice roller roll different-sided dice together?
Each roll uses one die size at a time — set the sides and the count, for example 3d8. To combine types (say 1d20 plus 2d6) roll each set separately and add the totals, applying any modifier once.
How do I roll for a game like Yahtzee or Monopoly?
Set the die size and count to match the game — five d6 for Yahtzee, two d6 for Monopoly or Backgammon, one d20 for many role-playing checks. The total and each individual roll appear, and a modifier can add a fixed bonus where a game calls for one.
API — use this calculator from code
Call this calculator as a free JSON endpoint — no key required. Send the field values below as query parameters or JSON. Read the full API docs →
Endpoint
GET https://calculator.free/api/v1/dice-roller/curl
curl "https://calculator.free/api/v1/dice-roller/?count=2&sides=6"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/dice-roller/?" + new URLSearchParams({
"count": "2",
"sides": "6"
}));
const data = await r.json();
console.log(data.results);Results are estimates for general guidance only, not financial, medical or tax advice.