Cone Calculator

What is Cone?

A cone tapers from a circular base to a single apex. Its volume is one third of the equivalent cylinder, and its lateral surface unrolls into a sector.

How it works

We find the slant height with the Pythagorean theorem, then use πr²h/3 for volume and πr(r + l) for total surface area.

1. Enter your input. Type or paste your input into the field above — the tool responds instantly.
2. Review the result. Output updates live as you type. Everything runs entirely in your browser.
3. Copy or download. Use the Copy button to grab the result, or Download to save it as a file.

Examples

Realistic sample

Type or paste any realistic input — the tool computes the result locally and instantly.

Common mistakes

Expecting a server round-trip

Nothing is uploaded — every tool in this category runs entirely in your browser.