d4 d6 d8 d20 d100
Dice Roller
Roll any standard or custom dice with a clean history and roll summary.
Open ToolEducational probability tools
Free Dice Simulator
Roll dice. Test probability. Analyze statistics.
A premium, no-gambling dice simulator for learning probability, testing outcomes, and running tabletop calculations with transparent data.
d20 exampletheoretical
20
expected avg
10.5
per face
5.0%
faces
20
Tools for dice probability and roll analysis
sum = X, >= X, <= X
Dice Probability Calculator
Calculate exact odds, expected values, and full distributions.
Open Tool1d20 2d6 4d6+2
RPG Dice Roller
Use formulas like 2d6+3 or 1d20+5 with advantage support.
Open Toolhistory analytics
Dice Statistics
Analyze your recent rolls with averages, highs, lows, and distribution charts.
Open ToolFAQ
Is this dice simulator free?
Yes. It is a free educational tool for dice rolls, probability learning, and tabletop calculations.
Is this a gambling product?
No. The site is designed for education, probability analysis, and RPG or tabletop use only.
Can I analyze roll history?
Yes. Roll history is planned with local storage, statistics, and export options.
Probability suite
Explore Roulette Simulator
Compare dice probability with roulette-style outcome simulation using the same clear analytics approach.
Probability reading
Stories and guides
2d6
Story 01: Classroom Probability Lab
A short educational note about classroom probability lab using 2d6 as the working example.
7Story 02: Why Seven Feels Common
A short educational note about why seven feels common using 7 as the working example.
1d20Story 03: D20 Advantage Explained
A short educational note about d20 advantage explained using 1d20 as the working example.
Online dice simulator for probability learning
Use this free dice simulator as an online dice roller, dice probability calculator, RPG dice roller, d20 roller, and dice statistics dashboard. It is built for transparent probability education without casino-style mechanics.