Dice Roller
Roll virtual dice for tabletop RPGs, board games, and decisions. Supports D4, D6, D8, D10, D12, D20, and D100 with modifiers.
Total Roll
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Average Expected —
Individual Rolls —
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Total Roll
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Average Expected —
Individual Rolls —
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Roll Results
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Dice Results —
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Statistical Context
Theoretical Average —
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How to Use This Calculator
- Enter the Number of Dice to roll (1–20).
- Select the Die Type (D6, D20, etc.).
- Optionally add a Modifier to add or subtract from the total.
- Click the calculate button to roll — each click gives a new result.
Formula
Each die is rolled: Random integer from 1 to N (where N = number of sides)
Total = Sum of all dice + Modifier
Average = Number of Dice × (Sides + 1) / 2 + Modifier
Example
Rolling 2D6 + 3 (two six-sided dice with +3 modifier).
- Die 1: 4, Die 2: 5
- Total = 4 + 5 + 3 = 12
- Average expected = 2 × 3.5 + 3 = 10
Frequently Asked Questions
- D20 means a 20-sided die. The "D" stands for die, and the number is the number of faces. Common dice are D4, D6, D8, D10, D12, D20, and D100.
- A modifier is a fixed number added to or subtracted from the total roll. In D&D, modifiers come from character stats and abilities. +5 on a D20 roll means the result + 5.
- This roller uses JavaScript's Math.random(), which is a pseudo-random number generator. It is fair for gaming purposes but not suitable for cryptography.
- Roll each die type separately and sum the results. For example, for 2D6 + 1D4, roll 2 six-sided dice, then 1 four-sided die, and add the totals.