Free Online Dice Roller – Roll Virtual Dice
Roll any number of dice with any number of sides.
About the Dice Roller
What is the Dice Roller?
A dice roller rolls any number of dice with any number of sides and adds an optional modifier.
Why use this calculator?
Tabletop gamers and teachers use it for board games, role-playing games and probability demonstrations.
How to use it
- Enter how many dice to roll.
- Set how many sides each die has.
- Add a modifier and press to roll.
Formula
Each die is independent and uniform: its result is 1 to the number of sides, with every value equally likely.
Change any field or reload the page to roll again.
Frequently Asked Questions
Are the rolls fair?
Each die uses JavaScript's random generator and is uniform, though for cryptographic fairness you would want a dedicated random source.
How do I roll a standard d20?
Set the number of dice to 1 and the sides to 20.
Can I print or share my result?
Yes. Use your browser's print function or screenshot the result. The page is designed to print cleanly.
What if my inputs are outside the typical range?
The calculators accept a wide range of values, but extreme inputs may produce unrealistic results. Double-check the units you are using.
How often is the calculator updated?
We review formulas and rates periodically to keep them aligned with current standards and published data.
Is this calculator free to use?
Yes. Every calculator on this site is completely free, with no hidden fees, no subscriptions and no limits on how many times you can use it.
How accurate are the results?
We use standard, widely accepted formulas and calculate in your browser using double-precision arithmetic. Results are rounded for readability, so treat them as reliable estimates rather than a guarantee. Real-world factors can vary the true figure.
Can I add this calculator to my own website?
Yes. Open this calculator page and use the "Add to your website" box in the sidebar to copy a ready-made iframe snippet, then paste it into any HTML page.
Does it work on a phone or tablet?
Yes. The layout is fully responsive, so it works on desktops, laptops, tablets and mobile phones, and every input adapts to touch screens.
Is the information I type kept private?
Yes. All calculations run locally in your browser. Nothing you enter is uploaded, stored or shared with anyone.