Roll single or multiple polyhedral dice (D4, D6, D8, D10, D12, D20, D100) and flip coins with true cryptographic randomness, modifiers, and probability stats. 100% private in-browser gaming cockpit.
D4 to D100, Modifiers & Rolls
Past 50 rolls with time stamps & instant re-roll
No rolls recorded in this session yet.
Technical reference and probability architecture guide for polyhedral dice rolling, coin toss Bernoulli trials, and cryptographically secure hardware entropy.
Sum of all active dice face values plus applied modifiers.
Array of face results showing dropped or kept dice.
Heads vs Tails outcome of Bernoulli trial.
Cryptographically Secure Hardware Entropy Source.
Physical dice have minor imperfections, while computer Math.random() repeats patterns. Our engine uses browser hardware entropy (crypto.getRandomValues) for mathematically unbiased gaming fairness.
Rolling 1d12 gives an equal 8.33% chance for every number. Rolling 2d6 creates a pyramid curve peaking at 7 (16.67% chance), which is why games like Catan and Craps use two dice.
Rolling with Advantage (take higher of 2d20) adds the mathematical equivalent of roughly a +3.32 bonus to your roll across the middle ranges.
Click the speaker icon in the dice tray to toggle tumbling dice sound effects on or off.
Format expressions as 'NdX + M' where N is count of dice, X is number of faces, and M is modifier (e.g. '2d8 + 3').
Yes. Every roll is generated via window.crypto.getRandomValues, which harvests physical hardware entropy from your device CPU/OS, exceeding casino gaming fairness standards.
We support all standard tabletop dice: D4 (4 sides), D6 (6 sides), D8 (8 sides), D10 (10 sides), D12 (12 sides), D20 (20 sides), and D100 (percentile).
Yes. Toggle the Advantage button to roll 2d20 and automatically keep the highest result, or Disadvantage to keep the lowest result.
Yes. Results can be copied in one click with timestamp and formula details, perfect for pasting into Discord or tabletop campaign chats.
Calculate accurate body fat percentage and lean muscle mass using the official US Navy Circumference Method with body category classification. 100% private in-browser health cockpit.
Calculate Daily Calorie Needs, Basal Metabolic Rate (BMR), and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor & Katch-McArdle formulas with macro targets. 100% private in-browser health cockpit.
High-precision scientific calculator supporting trigonometry, inverse and hyperbolic functions, natural/common logarithms, powers, and memory registers. 100% private.
Calculate total trip gas expenses, fuel consumption (MPG, L/100km, km/L), and per-passenger travel cost splits for road trips and commutes. 100% private.
Calculate cumulative and semester Grade Point Average (GPA) on standard 4.0 or weighted AP/Honors/IB scales with target projection. 100% private in-browser tool.
Convert data storage units across Decimal (SI: KB, MB, GB, TB) and Binary (IEC: KiB, MiB, GiB, TiB) standards with OS usable space disparity explanation.