Roll a D20 — Online D20 Dice Roller
On a fair D20 each face has a 1/20 = 5% chance. To meet or exceed 15 without a modifier, six faces succeed: 15–20, giving 6/20 = 30%. With +3, a roll of 12–20 succeeds: 9/20 = 45%.
Randomify Tool
Dice Roller
Choose the dice count and type (d4 through d20), see every roll, and optionally include the total for tabletop sessions.
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Understand your dice roll
Roll 3D6 — Three Six-Sided Dice
Three six-sided dice have 216 ordered outcomes. A total of 10 has 27 combinations: 27/216 = 12.5%. A total of 3 has just one: 1/216 ≈ 0.46%.
How to Use the Dice Roller
- 1Pick the number of dice (1–20) and select a die type from the dropdown: d4, d6, d8, d10, d12, d20, d100, or Custom.
- 2If you chose Custom, enter the number of sides for your die (2–200).
- 3Optionally add a modifier using the +/- buttons — the modifier is added to (or subtracted from) the total after all dice are rolled.
- 4Click Roll or use a quick preset like 1d20 or 3d6 to configure and roll in one tap.
- 5Each die appears as an individual card with pip visuals (d6) or a number. The total, including any modifier, is shown below.
- 6Copy results or scroll through roll history to review previous sessions.
When to Use the Dice Roller
A Dungeons & Dragons player rolls 1d20 for an attack roll, adds a +5 modifier for their strength bonus, and instantly sees whether they hit. The pip display and bounce animation make the roll feel satisfying even without physical dice.
A board game group playing remotely over video call uses the roller as a shared screen. Everyone sees the same result at the same time — no disputes about misread dice.
A teacher running a classroom probability exercise rolls 2d6 a hundred times and records the totals to build a bell-curve chart. Quick presets make repeated rolls efficient.
A game designer testing balance on a custom weapon rolls 3d8+4 repeatedly, checking the result history to spot outlier damage values.
Dice Roller vs. Random Number Generator
The Dice Roller speaks the language of tabletop gaming — d4, d6, d20, modifiers, and visual pip patterns. The Random Number Generator is better when you need a number from any arbitrary range (say 1 to 500) or want to draw multiple unique values. Use the Dice Roller for RPG sessions and the Number Generator for raffles, test data, and custom ranges. Try the Random Number Generator →
Select between classic RPG dice (d4 through d100) or enter a custom face count, then choose how many dice to roll at once. Randomify displays each die individually with neon chips so you can call out dramatic crits, but it also tallies the total when you need to resolve damage or skill checks fast. Because the entire roller runs in your browser, there’s no login, lag, or data collection—just clean numbers whenever the party needs them.
Quickly switch presets like 1d20, 3d6, or 4d8 with the one-tap preset buttons to keep play moving. Teachers and statisticians can leverage the same interface for probability demos, showing how totals cluster as more dice enter the mix. It’s the dice tray you always have handy, whether you’re storytelling on stream or running math drills in class.
- •Roll RPG dice (d4–d100) for tabletop sessions.
- •Generate quick random checks for classrooms and party games.
- •Roll multiple dice and total them for damage/skill checks.
- •Use multiple browser tabs to track different players.
- •Toggle totals off to focus on individual die results.
Frequently Asked Questions
You can roll standard RPG dice (d4, d6, d8, d10, d12, d20, d100) or choose a custom die with 2 to 200 sides. Roll up to 20 dice at once and optionally show totals.
Yes. Each face has an equal chance of appearing. Randomify uses the Web Crypto API when available, with a browser-random fallback.
Yes. Use the modifier controls to add or subtract from the total — handy for RPG bonuses, penalties, and ability modifiers.
Presets like 1d6, 2d6, 1d20, 3d6, and 1d100 configure the dice count and type in one click. They cover the most common tabletop rolls so you can jump straight to rolling.
Yes. Select "Custom" from the dice type menu and enter any number from 2 to 200. This lets you simulate non-standard dice or create weighted number ranges for custom games.
When rolling d6 dice, Randomify shows the classic dot pattern for each face (one through six pips arranged as on a real die). Other dice types display the numeric value instead.