Dice Roller & RNG
Everyday & OtherRoll virtual tabletop polyhedral dice (d4, d6, d8, d10, d12, d20, d100) with custom quantity, modifiers, roll history, statistical sums, and probability distribution.
Rolls: [4, 2, 6] · Expected average: 10.5
About this calculator
Tabletop roleplaying games (like Dungeons & Dragons, Pathfinder), board games, and probability classroom experiments require rolling random polyhedral dice with positive or negative modifiers.
This dice roller uses cryptographic random number generation to roll any combination of standard RPG dice (NdX + M), displaying individual die results, total sum, min/max possible ranges, and theoretical statistical expected averages.
How It Works & Formula
Each die roll generates an unbiased integer between 1 and X using Web Crypto API. Sum = ∑(Die_i) + Modifier. Expected theoretical mean = N × (X + 1) / 2 + Modifier.
Related Calculators
View All (24)Tip & Bill Split Calculator
Calculate tip percentages, total bill, and split amounts evenly among friends or party members.
Fuel Cost & Trip Mileage
Calculate total gas cost for a road trip, cost per passenger, and fuel efficiency (MPG vs L/100km).
Aspect Ratio & Screen Resizer
Calculate matching dimensions for 16:9, 4:3, 21:9, 1:1, or custom aspect ratio video and photo resolutions.
GPA & Grade Point Calculator
Calculate semester and cumulative Grade Point Average (GPA) on 4.0 scale with credit weights.