Dice Roller

How to use the dice roller

1. Tap a die for a quick roll, or type standard notation like 2d6+3 or 4d8.
2. Press roll to see the total and each die's value, with a running history.
3. Share a "beat my roll" link to challenge a friend with the same dice.

Dice notation, decoded

Tabletop notation is NdM: roll N dice with M sides each. So 2d6 is two six-sided dice, and a modifier like +3 is added to the total. The roller handles multiple dice and modifiers in one expression.

Genuinely fair rolls

Each die uses your browser's cryptographic random generator, so every face has an exactly equal chance: no loaded dice, no bias. That makes it a reliable stand-in when you have lost your physical set or are playing remotely.

Same average, different feel: comparing damage dice

In Dungeons & Dragons a weapon's damage die is not just a number — it is a shape. The classic argument is the greatsword's 2d6 against the greataxe's 1d12: the greatsword has the higher average, but the greataxe is the one that can swing wildly. Roll each and watch the distribution above change shape.

Two lessons fall out of that table. First, adding dice narrows the spread: 2d6 almost never rolls a 2 or a 12, while 1d12 hits its extremes one time in twelve — which is why the greataxe feels swingier even though it averages half a point less. Second, a flat modifier is worth more than it looks: 2d6+3 clears 10 damage well over half the time, because the +3 lifts the whole curve instead of widening it.

The same shape argument explains ability scores. 4d6dl1 — roll four six-sided dice, drop the lowest — averages 12.24 rather than 3d6's 10.5, and gives you an 18 about 1.6% of the time. Rolling a 3 requires all four dice to come up 1, which happens once in 1,296 attempts.

Games that turn dice into damage

Dungeons & Dragons is the obvious one: a d20 decides whether you hit, and the weapon's dice decide how hard. Baldur's Gate 3 put that machinery on screen for millions of players who had never touched a character sheet — it implements D&D 5th edition rules, and the little d20 spinning in the corner before a dialogue check is doing exactly what a table does, advantage and all. Pathfinder works the same way with a wider spread of dice; Warhammer 40,000 throws fistfuls of d6 for hits, wounds and saves; Powered by the Apocalypse games hang everything on 2d6, where the bell curve makes a 7-9 partial success the most common outcome by design.

Even outside RPGs the shape matters: Catan puts its best numbers on 6 and 8 because 2d6 peaks at 7, Monopoly's board spacing assumes the same curve, and Yahtzee is 5d6 keep-what-you-like — the original drop-and-reroll mechanic.

Where you'll use it

• Tabletop RPGs like Dungeons & Dragons (attack rolls, saves, damage, ability scores).
• Board games that need a quick d6 or two.
• Making a fair, random decision when you just need a number.

For common rolls on their own page, see the popular rolls linked above.

Where you'd use this

Playing tabletop games without a physical set — remote sessions, a lost bag of dice, a character sheet that needs six ability scores rolled right now.

For example: A D&D session needs a new character's stats. Six rolls of 4d6dl1 produce the array, and the odds panel confirms that the 17 was genuinely lucky: only 5.8% of rolls reach it.

Popular rolls

• d20
• d6
• d100
• d12
• d10
• d8
• d4
• 2d6
• 3d6
• 4d6 drop lowest

Frequently asked questions

What are the odds of rolling a 15 or higher on a d20?

30%. Six of the twenty faces (15 through 20) succeed, so 6/20 = 30%. With advantage — roll two d20 and keep the highest, written 2d20kh1 — that rises to 51%, and with disadvantage it falls to 9%. The roller shows the exact figure for any target you type.

How does 4d6 drop lowest work?

Roll four six-sided dice, discard the single lowest, and add the remaining three. It is the standard way to generate D&D ability scores: the average comes out at 12.24 rather than 3d6's 10.5, an 18 turns up about 1.62% of the time, and a 3 requires all four dice to roll 1 — once in 1,296 attempts. Type 4d6dl1 to roll it.

How do I roll with advantage or disadvantage?

Type 2d20kh1 for advantage (roll two d20, keep the highest) or 2d20kl1 for disadvantage (keep the lowest). The dropped die is shown struck through so you can see both results. Advantage is worth roughly +3 to +5 on the average roll, depending on the target number.

What dice can I roll?

Standard polyhedral dice — d4, d6, d8, d10, d12 and d20 — plus multiple dice at once, ideal for tabletop and role-playing games.

Are the rolls really random?

Yes. Each roll uses your browser’s random generator, so outcomes are fair and unpredictable — no loaded dice.

Is anything uploaded?

No. Rolls are generated locally in your browser.

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