Pick the die and how many to roll, and the page returns each face and the total. Every face of a fair die is equally likely, so a six-sided die lands on any number with a 1 in 6 chance, and the average over many rolls is 3.5. Two dice average 7.
Board games lose their dice, tabletop players need a d20 in a hurry, and teachers want a quick demonstration of probability. This roller draws each die from your browser's cryptographic random source, so every face from 1 to the number of sides is equally likely. Choose a standard die from d4 to d100 or enter any side count up to 1,000, and roll up to 20 dice at once. The result lists each face, the total, the lowest and highest totals possible, and the average total you would see over a long run, with a table showing die by die. One limit: it rolls dice and adds them; it does not apply game modifiers such as advantage, rerolls or dropping the lowest die.
Pick a standard die such as d6 or d20, or choose a custom number of sides and type it in.
Use the − and + buttons to roll between 1 and 20 dice together.
Each face appears in the result line, with the total and the possible range beside it and a per-die table below.
Result You rolled: 4
Total: 4
Average total over many rolls: 3.5
Lowest possible total: 1
Highest possible total: 6
Each face from 1 to 6 has a 1 in 6 chance, and the long-run average of many rolls is 3.5.
Result You rolled: 5, 2
Total: 7
Average total over many rolls: 7
Lowest possible total: 2
Highest possible total: 12
Sums run from 2 to 12, and 7 is both the average and the most common total.
Result You rolled: 15
Total: 15
Average total over many rolls: 10.5
Lowest possible total: 1
Highest possible total: 20
Each number from 1 to 20 has a 5% chance; the average roll is 10.5.
face = uniform whole number from 1 to s; average total = n × (s + 1) ÷ 2
snEach die is an independent uniform draw over the whole numbers 1 to s, so every face has probability 1/s. The expected value of one die is the mean of its faces, (s + 1) ÷ 2: 3.5 for a d6 and 10.5 for a d20. Expected values add, so n dice average n times that. The lowest total is n (every die shows 1) and the highest is n × s.
Each face comes from the browser's cryptographic random source and has exactly a 1/s chance. Physical dice often fall short of that: worn edges, drilled pips and uneven density give some faces a small bias.
Six of the 36 equally likely pairs add to 7 (1+6, 2+5, 3+4 and their reverses), while only one pair makes 2 and one makes 12. So 7 has a 1 in 6 chance and the extremes 1 in 36 each.
The d stands for die and the number for its sides. Tabletop role-playing games use the set d4, d6, d8, d10, d12 and d20, with d100 often rolled as two ten-sided dice for tens and units.
The mean of the faces 1 to 20 is (20 + 1) ÷ 2 = 10.5. Any single roll is a whole number, but over hundreds of rolls the average settles close to 10.5.
Yes. Choose the custom option and type any whole number from 2 to 1,000. Such dice are hard to make physically fair, but a random draw handles them without trouble.
No. The roll is made in your browser and is gone when you leave or roll again. A shared link carries your die and dice count, not the faces you rolled.
Using this tool in an assignment, article or report? Copy a citation, or a link for your website.
Tools Directory Editorial Team. (2026, October 14). Roll a Die. Tools Directory. Retrieved October 26, 2026, from https://tools.milunir.com/fun-random/pickers-wheels-and-dice/roll-a-die/
Tools Directory Editorial Team. “Roll a Die.” Tools Directory, 14 Oct. 2026, https://tools.milunir.com/fun-random/pickers-wheels-and-dice/roll-a-die/. Accessed 26 Oct. 2026.
Tools Directory Editorial Team. “Roll a Die.” Tools Directory. Last modified October 14, 2026. Accessed October 26, 2026. https://tools.milunir.com/fun-random/pickers-wheels-and-dice/roll-a-die/.
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