Roblox username value checker
Type a username and get a 0–100 scarcity score with every factor shown — length, dictionary-word or first-name status, digits and underscores, readability. A rubric, not a price: Roblox does not sell usernames, and its Terms of Use prohibit buying or selling accounts.
Computed in your browser — nothing is sent, and the tool never asks Roblox whether a name is taken.
What “username value” means here
People search for a username price checker expecting a figure in Robux or dollars. Roblox does not sell usernames, and the Roblox Terms of Use (Effective Date May 19, 2026, fetched from Roblox's help center on September 10, 2026) say: “Selling your Account or your access credentials to another User is strictly prohibited. Similarly, purchasing another User's Account or access credentials is strictly prohibited.” The same document reserves Roblox's right to terminate an account that violates it. A quoted price for a name describes a banned transaction, which is also why so many account-sale offers are scams.
So this tool scores what the phrase actually points at: how scarce and how clean a name is. A three-letter word is rare; a fourteen-character handle with a birth year on the end is not. The score ranks that, shows its arithmetic, and stops there.
The rules a username has to follow
The checker first tests the name against Roblox's format rules, which we verified on September 10, 2026 by sending test names to the validation endpoint the signup form uses and keeping Roblox's replies: “Usernames can be 3 to 20 characters long”, “Only a-z, A-Z, 0-9, and _ are allowed”, “Username cannot contain spaces”, “Usernames can have at most one _”, and “Username can’t start or end with _”. The signup page's own script enforces the same five checks. A name that fails one is marked invalid and not scored.
From the same session: every random short combination we tried (four of three characters, two of four) came back “Username is already in use” — a handful of probes, not a census, but consistent with the shortest names being long gone.
The rubric
Four factors, summing to 100, each shown in the result so you can disagree with it.
| Factor | Max | How it is scored |
|---|---|---|
| Length | 40 | 3 characters 40 · 4 = 32 · 5 = 24 · 6 = 16 · 7 = 10 · 8 = 6 · 9–10 = 3 · 11–20 = 0 |
| Word or name | 30 | The letters alone (digits and underscore stripped, lowercased) are a listed dictionary word 30 · a common first name 25 · split into two listed words or names of three-plus letters each 15 · otherwise 0 |
| Digits and underscore | 20 | No digits 20 · one or two digits 12 · three or more 6 · minus 6 for an underscore · no letters at all 0 |
| Readability | 10 | Letters contain a vowel, no run of four-plus consonants, no character tripled: 10 · one fault 5 · no vowel 0 |
Tiers: 80 and up is Scarce, 60–79 Strong, 40–59 Ordinary, below 40 Common. The word list is the public-domain ENABLE lexicon trimmed to three- to seven-letter entries with regular plurals and -ed forms dropped, 34,631 words; the name list is the U.S. Census Bureau's 1990 frequently occurring first names, 5,130 of them.
Worked examples
builderman — user id 156, created March 8, 2006 per the users API on September 10, 2026. Ten characters: length 3. Not a single listed word, but the letters split into “builder” + “man”: 15. No digits, no underscore: 20. Vowels, no awkward runs: 10. Total 3 + 15 + 20 + 10 = 48, Ordinary. Fame is not in the rubric; the score describes the string.
Roblox — the platform's own automated account, user id 1, created February 27, 2006. Six characters: 16. “roblox” is not a listed word, but the splitter finds “rob” + “lox” (both ENABLE entries), so it scores 15 — a false positive. No digits: 20. Readable: 10. Total 16 + 15 + 20 + 10 = 61, Strong, with a flag: the Terms of Use bar “Roblox”, “Blox” and similar names from usernames.
DragonSlayer_9920137 — a name we constructed for this example; the validator reported it valid and not in use on September 10, 2026. Twenty characters: 0. The letters split into “dragon” + “slayer”: 15. Seven digits (base 6) and an underscore (minus 6): 0. Readable: 10. Total 0 + 15 + 0 + 10 = 25, Common. A good pair of words with a serial number bolted on scores like the serial number.
For scale, the maximum needs a three-letter dictionary word with a vowel and nothing attached — “ace” scores 40 + 30 + 20 + 10 = 100.
Limitations
The weights are ours — short beats long, words beat strings, letters beat digits — and nothing is calibrated against trades, because no legitimate trades exist to calibrate against. Treat the tiers as marks on a ruler, not appraisals.
The tool does not check availability. Roblox's users API answers a server but sends no cross-origin header, so a page on this domain cannot query it from your browser; the signup form and the change-username screen in account settings are where you find out whether a name is free, and that changes without notice. Changing a username costs Robux, and previous usernames stay visible through People search (Roblox help center, “Changing Your Username”, fetched September 10, 2026), so a new name is not a clean slate.
The word list misses things: seven letters is the ceiling, brand names and game terms are absent, and the splitter will find “rob” + “lox” in a coined word. When that factor looks wrong, read its note and decide for yourself.
FAQ
How much is my Roblox username worth in Robux?
There is no Robux figure, because there is no permitted market. Roblox does not sell usernames and its Terms of Use prohibit selling or buying accounts. This checker scores scarcity on a 0–100 rubric instead and shows every factor.
Are three-letter Roblox usernames rare?
Yes. Three characters is the shortest Roblox allows, per its validator on September 10, 2026, and every three- and four-character combination we probed that day was already in use.
Does the tool tell me whether a username is taken?
No. It never contacts Roblox — the users API does not permit browser requests from other sites — so use the signup form or the change-username screen in account settings.
Why did my name score “Invalid”?
It broke one of Roblox's format rules: 3 to 20 characters; only letters, digits, and underscore; at most one underscore; none at the start or end. The failed rule is highlighted above the score, in Roblox's own wording.
Can I buy a rare username from someone?
Not without breaking the Terms of Use on both sides — selling and purchasing accounts or credentials are each “strictly prohibited”. Offers to sell a short or OG name are also a staple of account scams; our scams write-up covers the pattern.
Related tools
- Roblox Account Value Calculator — inventory value, name excluded
- Roblox Account Age Checker — join date to days and milestones
- Roblox Avatar Viewer — from a profile URL or user id to the official avatar view
- How much is your account worth? — the essay behind the account calculator