Cube root equation writer
Type what goes under the root. Copy a full ∛(…) equation that pastes identically everywhere.
How it works
Type the expression
Enter whatever belongs under the root — a plain number, a single variable, or a short expression like 2x-1.
Check the live preview
The box above the buttons shows exactly how it will look, rendered with a real CSS radical and bar — not a font trick.
Copy the equation
One click copies ∛(…) with your expression inside the parentheses — plain text that renders identically everywhere, including plain-text-only fields.
Why ∛(…) instead of a rendered bar?
A true overline bar as plain text has to be built from Unicode combining marks, and how solid it looks depends entirely on the paste target's font rendering — it can come out uneven or with visible gaps, especially in Gmail, Google Docs, and Word. Parentheses have no such rendering ambiguity: ∛(…) is plain, ordinary text that pastes identically in every app, including plain-text-only fields.
Frequently asked questions
How do I write a cube root equation on a computer?
Type what belongs under the root into the box above — a number, variable, or short expression — and the tool generates a full ∛(…) equation. Copy it with one click and paste it anywhere text is accepted.
Can this write square roots or other nth roots?
No — this tool is cube-root only, by design. For a square root, use the square root equation writer instead; for a 4th root or any other index, the nth root equation writer lets you set n directly and generates the correct symbol automatically.
Why does the equation use ∛(…) 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 ∛(…) pastes identically everywhere.
Will the equation paste correctly into Word or Google Docs?
Yes. Because it's plain text rather than an image or font-dependent glyph, ∛(…) pastes into Word, Google Docs, email, and chat apps exactly as it appears in the preview, keeping your document's font and size.