What the dice are actually doing

Every table has someone convinced their d20 hates them. It does not — but the shape of the maths behind D&D rolls is genuinely worth understanding, because it changes how you build a character.

A d20 is flat, and that is the whole design

A single twenty-sided die gives every result exactly 5% chance. There is no middle to regress to. That flatness is why a +3 modifier matters so much in D&D — it moves your success chance by a full 15 percentage points, every time.

Compare 3d6, which older systems used. Rolling three six-sided dice gives a bell curve: 10 and 11 come up about 12.5% each, while 3 and 18 turn up less than half a percent of the time. Under 3d6, modifiers matter enormously near the middle and barely at all at the edges.

Advantage is worth more than you think, and less than you fear

Rolling twice and taking the higher is not a flat bonus. Its value depends entirely on the target number. Against a roll you would make half the time, advantage is worth roughly +5 — enormous. Against something you need a 19 for, it is worth about +1.

This is why advantage is strongest for mid-difficulty checks and nearly worthless for desperate ones. The maths: your chance of failing twice is the square of your chance of failing once.

Your dice are probably fine

Mass-produced polyhedral dice do have measurable bias — casino dice are machined to tolerances gaming dice never approach. But the bias is small, and human memory of streaks is not.

If you genuinely want to test one, float it in heavily salted water and spin it. A consistently biased die will settle with the same face up. Most will not.

What you could build here

Three directions that would work on this name. None of them is the only answer — it is your name once it is yours.

1. A dice tool that beats what exists. Most online rollers are ad-choked and slow. Fast, clean and free wins this category on merit alone.
2. A VTT companion. Shared rolls, session logs, a link players open on their phone. The tabletop software market is real and the incumbents are clunky.
3. A defensive pickup. If you own the .com in this space, the .net stops someone else trading on your traffic — usually the cheapest brand protection you will ever buy.

Roll some dice

• DnD Dice RollerEvery die a tabletop needs, no clutter
• DiceRollerDND3D digital dice you can throw
• Quantum Dice RollerRolls seeded from quantum randomness
• Legend RollerCharacter sheets and campaign rolling
• The Book of WorldsBuild a tabletop setting from scratch
• DnD ChessTwo-player chess with D&D monsters

Who you would be buying from

We build and run the sites below. That is the whole pitch: this name is not sitting in a speculator's spreadsheet — it comes from people who make things on the web and know what a good name is worth to someone who is going to use it.

• OMXUSThe studio behind all of this — software, licensing, and the infrastructure the rest of these sites run on.
• DnD Dice RollerA dice tool with no ads, no sign-up and no loading screen. It exists because every other one is exhausting.
• Legend RollerCharacter sheets, campaign rolling and party state, built for people who actually run games weekly.
• HorrorMoviesListCurated horror with real writing behind the picks, not scraped metadata dressed up as a list.
• MyNESGamesYour own NES ROMs, playable in a browser tab, with nothing uploaded anywhere.
• VoteAussieDigital identity with no central authority — Australia already runs elections without ID, so this asks why the internet cannot.
• The Price of WarA 3D memorial that makes the number of dead something you have to move through rather than read.
• NumeroscopeNumerology written honestly — for reflection, not prophecy. Proof that a mystical niche can be done without lying to anyone.
• Text Diff OnlinePaste two things, see what changed. Free, instant, nothing leaves the browser.
• NeuAIs ObservatoryA modular observatory for watching how AI systems actually behave.

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