How to Use
Select the number of dice you want to roll.
Choose the die type - d4, d6, d8, d10, d12, d20, or enter a custom number of sides.
Add a modifier (positive or negative) if your game rules require one.
Click Roll and read the individual die results plus the total.
What Is This Tool?
A virtual dice roller simulates tabletop dice for games, probability demonstrations, and random decisions. It supports standard dice notation used in tabletop RPGs: NdX+M means roll N dice of X sides and add modifier M (e.g., 2d6+3 means roll two 6-sided dice and add 3). Common dice types include d4, d6, d8, d10, d12, d20, and d100 (percentile). Notably, rolling multiple dice produces a bell-curve distribution due to the central limit theorem - two d6 average around 7, so results cluster toward the middle rather than being uniformly spread from 2 to 12. This is the core probability insight behind most tabletop RPG design.
Why It Matters
Physical dice develop bias over time from wear and imperfect manufacturing. Digital dice use a random number generator that maintains statistical fairness across millions of rolls. For educators, rolling dice digitally in class demonstrations is faster and results can be projected for the entire class to see - making probability lessons more interactive and immediate.