How the roller works
Each die is generated independently as a random whole number between 1 and the number of sides you chose, with every face equally likely. The roller sums those individual results and then adds your modifier to produce the total.
This follows standard tabletop dice notation. A setup of three dice, six sides, and a modifier of two is written 3d6+2 and means roll three six-sided dice and add two to the sum.
Reading the result
The output breaks the roll into parts so you can see exactly how the total was reached.
- Total: the sum of the dice plus the modifier — the number that usually matters in play.
- Sum of dice: the raw roll before any bonus or penalty.
- Individual rolls: each die shown separately, useful for rules that care about specific faces.
Tips and caveats
Because each roll is independent and random, the result changes every time you run it — that is the point, but it also means you cannot reproduce a previous roll.
- A negative modifier acts as a penalty and is subtracted from the sum.
- Rolling more dice narrows the spread of the total toward the average, while a single die is flat across all faces.
- These rolls are suitable for games but not for any use that needs cryptographic randomness.
Formula
total = (sum of each die roll) + modifierFrequently asked questions
- Are the rolls truly random?
- They use the browser's random number generator, which is fine for games but not for cryptography.