Online Dice Roller

Lost the dice? Click the button to roll a six-sided die, or type any dice notation such as 2d6+3, 1d20 or 4d6kh3. Free, no sign-up, and it works on phones, tablets and computers.

Press “Roll the Dice!” to roll one six-sided die.

Sound ·

How to use this dice roller

The roller is built so that anyone can use it, from a family looking for a quick die on game night to a game master running a long role-playing campaign.

Roll one die: press Roll the Dice!. The box starts with 1d6, which means one ordinary six-sided die, so a single click gives you a number from 1 to 6.
Pick a different die: tap one of the quick buttons under the box (d4, d8, d10, d12, d20, d100 and more). The roll happens straight away.
Type your own roll: write any dice notation in the box, for example 3d6 or 1d20+5, and press Roll the Dice! or the Enter key.
Read the result: the big number is the total. Underneath you can see every single die, so you can check how the total was made. Your last eight rolls are listed below the result.

The page also counts how many times you have rolled on this device, and you can switch the rolling sound on or off. Both settings stay in your own browser. For keyboard tips, all supported notation and troubleshooting, read the full guide on how to use the dice roller.

Dice notation in one minute

Board games and role-playing games describe dice with a short code called dice notation. The number before the letter d is how many dice you roll, and the number after it is how many sides each die has. A plus or minus sign at the end adds or subtracts a fixed number, called a modifier.

So 2d6+3 means: roll two six-sided dice, add them together, then add 3. If the dice show 4 and 6, the result is 4 + 6 + 3 = 13. The roller accepts all of the examples in the table below.

Common dice notation examples
Notation	What it means	Possible results	Average result
`1d6`	One six-sided die	1–6	3.5
`2d6`	Two six-sided dice added together	2–12	7
`2d6+3`	Two six-sided dice plus 3	5–15	10
`1d20-1`	One twenty-sided die minus 1	0–19	9.5
`3d8`	Three eight-sided dice	3–24	13.5
`1d100` or `d%`	A percentile roll	1–100	50.5
`4d6kh3`	Roll four d6 and keep the highest three	3–18	12.24
`2d20kh1`	Roll two d20 and keep the higher one (advantage)	1–20	13.83

A quick way to find the average of a roll: one die with S sides averages (S + 1) ÷ 2, so a d6 averages 3.5 and a d20 averages 10.5. Multiply by the number of dice and add the modifier. For 2d6+3 that is 2 × 3.5 + 3 = 10.

How likely is each roll?

Every face of a fair die is equally likely. With one six-sided die, each number from 1 to 6 comes up with probability 1/6, or about 16.67%. Things get more interesting when you add dice together. Two six-sided dice can land in 6 × 6 = 36 equally likely ways, but many of those ways give the same total. There is only one way to roll 2 (1 + 1), while there are six ways to roll 7 (1 + 6, 2 + 5, 3 + 4, 4 + 3, 5 + 2 and 6 + 1). That is why 7 is the most common total in games that use two dice.

Totals when rolling two six-sided dice (2d6)
Total	Ways (out of 36)	Probability
2	1	2.78%
3	2	5.56%
4	3	8.33%
5	4	11.11%
6	5	13.89%
7	6	16.67%
8	5	13.89%
9	4	11.11%
10	3	8.33%
11	2	5.56%
12	1	2.78%

A few other handy numbers: the chance of rolling doubles with two dice is 6 in 36, or 1 in 6. The chance of getting at least one 6 when you roll four dice is just over 50% (51.77%). Rolling five of a kind with five dice in a single throw happens only 6 times in 7,776, or about once in every 1,296 throws. The dice probability guide explains how these numbers are worked out and has tables for three dice, the d20 and more.

Where you can use an online dice roller

Board and family games

Many classic games need one or two six-sided dice. In Monopoly you move by the total of two dice, and rolling doubles lets you roll again. In backgammon you move checkers by the number on each of two dice. Yatzy (sold as Yahtzee in some countries) uses five dice. If the dice have gone missing, set the box to 2d6 or 5d6 and play on.

Dungeons & Dragons and other RPGs

Tabletop role-playing games use the whole set of polyhedral dice: d4, d6, d8, d10, d12, d20 and the percentile d100. In Dungeons & Dragons fifth edition you roll a d20 for attacks and ability checks, roll two d20 and keep the higher one for advantage (2d20kh1) or the lower one for disadvantage (2d20kl1), and a common way to create ability scores is 4d6kh3.

Classroom and learning

Teachers use dice to practise adding and subtracting, to make random groups, and to teach probability. Rolling 2d6 fifty times on a projector and tallying the totals makes the “7 is most common” pattern easy to see. Because the roller can throw up to 100 dice at once, big experiments take seconds.

Everyday decisions

Can’t decide who goes first, which chore to do, or what to cook tonight? Number the options and roll a die with the same number of sides, for example 1d4 for four choices or 1d12 for twelve. Every option has exactly the same chance.

Is the online dice roller fair?

Yes. Each die is rolled with your browser’s cryptographic random number generator (crypto.getRandomValues), which is designed to be unpredictable. The roller also uses a technique called rejection sampling, which throws away the few random values that would make some faces slightly more common than others. The result is that every face of every die has exactly the same chance. Nothing is sent to a server: the dice are rolled on your own device, the moment you press the button.

Fair dice have no memory. If you have rolled three 1s in a row, the next roll is still just as likely to be a 1 as anything else. Streaks feel surprising, but they are a normal part of randomness.

Did you know? On a standard six-sided die the opposite faces always add up to seven. If a 6 is on top, the 1 is facing the table; 2 is opposite 5, and 3 is opposite 4.

A very short history of dice

People have been rolling dice for around five thousand years. Before cube-shaped dice, games were played with the knucklebones of sheep and goats, which land on one of four sides. Some of the oldest cube dice found by archaeologists come from Shahr-e Sukhteh, the “Burnt City” in south-eastern Iran, and from cities of the Indus Valley civilisation in what is now Pakistan and India. Today the six-sided cube is still by far the most common die, while role-playing games popularised dice with 4, 8, 10, 12 and 20 sides.