Quick start
- Enter how many dice you want to roll.
- Enter the number of sides per die.
- Add a modifier only when the game or example calls for one.
Best uses
These are the situations this tool is meant for. If your task is close to one of these, the examples and notes below can help you choose the right inputs.
- Roll 1d6, 2d6, d20, percentile-style dice, or custom sided dice.
- Add a positive or negative modifier for tabletop game checks.
- Show each die roll and the final total.
- Keep recent rolls while comparing examples.
What this calculator is solving
The Dice Roller is for quick, casual random rolls. It shows every die, the subtotal, the modifier, and the final total so the result is easy to check.
You do not need to memorize the formula first. Start by matching each input label on the calculator to the number, date, unit, or setting you actually have.
The formula in plain language
In plain language: The roller generates each die as a random whole number from 1 through the number of sides, adds the rolls together, then applies the modifier. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
If that sounds abstract, use the example cards on the calculator page. They show a complete set of inputs and the kind of answer you should expect.
How to read the answer
Read the headline result first. Then look at the smaller supporting lines because they explain the parts behind the answer, such as totals, units, ranges, or formula steps.
- The main answer is the final total after the modifier.
- Rolls shows the individual die results.
- Subtotal is the dice total before the modifier.
Common mistakes to avoid
If the answer looks strange, the most likely cause is a small input mismatch: the wrong unit, date, weight, scale, mode, or policy assumption.
- Do not use this for gambling, official drawings, or audited random selection.
- Check whether your game needs one die, multiple dice, or a modifier.
- Remember that random rolls can repeat and do not balance out in short runs.
Research and references
This guide is based on the calculator inputs, the formula note on the tool page, and common school or everyday usage patterns. If your school, workplace, or organization has an official rule, use that rule first.
Examples from the calculator
Two rolls from 1 to 6, added together
One d20 roll plus modifier 5
Four rolls from 1 to 10
FAQ in plain language
When should I use the Dice Roller?
Use it when your task matches one of these common needs: Roll 1d6, 2d6, d20, percentile-style dice, or custom sided dice. Add a positive or negative modifier for tabletop game checks. It works best when you already know the values, dates, units, or settings the page asks for.
What is the Dice Roller doing with my inputs?
In plain language: The roller generates each die as a random whole number from 1 through the number of sides, adds the rolls together, then applies the modifier. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What should I double-check before trusting the answer?
Use it for everyday games, teaching, and quick picks. Do not use it for gambling, legal drawings, security, or audited randomness. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
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Privacy and copying results
Recent answers stay visible only while you work in the current browser tab. They are not sent to a server.
Use Copy answer when you want to paste the expression and result into notes, homework, a message, or another document. Check the units and assumptions before copying.