Nth root equation writer
Set the index, type what goes under the root. Copy a full ⁿ√(…) equation that pastes identically everywhere.
How it works
Set the index
Enter n — 4, 5, 12, whatever root you actually need. This is the number that decides which root it is.
Type the expression
Enter whatever belongs under the root — a plain number, a single variable, or a short expression like 2x-1.
Copy the equation
One click copies ⁿ√(…), with the correct superscript index and your expression inside the parentheses — plain text that renders identically everywhere.
Why the symbol itself updates as you type
Unlike a square or cube root, there's no fixed character to fall back on — ⁿ√ is built from a superscript digit (or digits) immediately followed by the plain radical, U+221A. Change the index and the tool re-composes it live, so the symbol you copy always matches the number you actually typed, rather than a generic placeholder.
Frequently asked questions
How do I write an nth root equation on a computer?
Set the index (n) to the root you need, type what belongs under it — a number, variable, or short expression — and the tool generates a full ⁿ√(…) equation with the correct superscript digits. Copy it with one click and paste it anywhere text is accepted.
Why does the symbol change when I edit the index field?
Because there's no single fixed nth-root character the way √ and ∛ are fixed — the symbol is built live from whatever index you type, using the matching Unicode superscript digits followed by the radical. Change the index from 5 to 12 and the preview updates to ¹²√ immediately.
What if I leave the index blank or type something that isn't a number?
The preview falls back to the generic ⁿ√ placeholder — using the actual superscript letter n (U+207F) — since there's no specific root to show yet. Type a whole number of 2 or higher to get a real, specific root symbol.
Can this also write square roots or cube roots?
Yes, technically — setting the index to 2 or 3 produces √ or ³√ (visually similar to ∛, though built from separate characters rather than the single ∛ code point). For those two specifically, the dedicated square root and cube root equation writers use the real single-character symbols instead, which is usually what you want.
Why does the equation use ⁿ√(…) instead of a bar over the number?
A true overline as plain text depends on Unicode combining marks, which render inconsistently — often uneven or gapped — in Gmail, Google Docs, and Word. Parentheses are ordinary text with no rendering ambiguity, so ⁿ√(…) pastes identically everywhere.
Will the equation paste correctly into Word or Google Docs?
Yes. Because it's plain text built from real Unicode characters rather than an image or font-dependent glyph, it pastes into Word, Google Docs, email, and chat apps exactly as it appears in the preview, keeping your document's font and size.