Custom Dice Roller
Roll custom dice with our free online dice roller. Supports d4 to d100. Roll up to 10 dice and view totals, results, and frequency distribution charts.
About This Calculator
Our custom dice roller lets you roll up to 10 virtual dice with your choice of sides — from the standard d4, d6, and d8 all the way to d20 and d100. Whether you are playing a tabletop RPG, testing probabilities for a game design, or teaching statistics concepts, this tool provides instant random rolls with detailed analysis.
Each die generates a random integer between 1 and the selected number of sides using a fair uniform distribution. The calculator displays the total sum of all dice, the average roll value, a breakdown showing each individual die result, and a frequency chart that visualizes how often each face value appeared. This makes it easy to spot patterns or verify the fairness of your rolls.
The custom dice roller supports seven die types: d4 (tetrahedron), d6 (cube), d8 (octahedron), d10 (pentagonal trapezohedron), d12 (dodecahedron), d20 (icosahedron), and d100 (Zocchihedron). These cover the most common dice used in role-playing games and board games worldwide.
Your dice configuration is saved to the URL after each roll, making it easy to share or bookmark your preferred setup. Open the link later to automatically restore the same number of dice and sides.
Regional Notes
Dice notation and usage are consistent across all regions (IN, US, UK). The standard dX notation (where X is the number of sides) is universally recognized in tabletop gaming and mathematics. The calculator uses English numbering and terminology for all users.
Frequently Asked Questions
How does the custom dice roller work?
Select the number of dice (1-10) and the number of sides per die (4, 6, 8, 10, 12, 20, or 100). Each die generates a random integer between 1 and the chosen number of sides. The calculator displays the total sum, individual roll values, and a frequency chart showing how often each face value appeared.
What dice types are supported?
The custom dice roller supports standard polyhedral dice: d4 (4-sided), d6 (6-sided), d8 (8-sided), d10 (10-sided), d12 (12-sided), d20 (20-sided), and d100 (100-sided). These cover the most common dice used in tabletop role-playing games (RPGs), board games, and educational probability experiments.
Can I roll different types of dice together?
Currently all selected dice share the same number of sides. For rolling mixed dice types (e.g., 1d20 + 2d6), use the DnD Dice Roller calculator on this site which supports combining different die types in a single roll.
Is the dice roll truly random?
The dice roller uses JavaScript's Math.random() function which employs a pseudo-random number generator. While not cryptographically secure, it provides sufficient randomness for board games, RPGs, educational demonstrations, and statistical sampling. Each roll is independent of previous rolls.
Can I share my dice roll results?
Yes. After rolling, the calculator saves your dice configuration (number of dice and sides) to the URL. You can copy the URL to share your exact dice setup with others. When they open the link, the calculator automatically rolls the same configuration.
What is the average roll for a custom die?
For a fair die with N sides, the expected average value is (N + 1) / 2. For example, a d6 averages 3.5, a d20 averages 10.5, and a d100 averages 50.5. The calculator displays the actual average of your rolled dice for comparison against the theoretical expected value.
How many dice can I roll at once?
You can roll up to 10 dice at once. Each die generates its own independent random value, and the calculator shows the total sum along with individual results for each die in the breakdown table.
What can I use a custom dice roller for?
Custom dice rollers are useful for tabletop RPGs like Dungeons and Dragons, board games, educational probability experiments, statistical sampling demonstrations, game design testing, and any situation requiring random number generation with specific ranges.