Cone Calculator
Volume, slant height and surface area of a cone.
Volume
37.699112cm³
Slant height
5cm
Lateral surface
47.12389cm²
Total surface
75.398224cm²
ShowHide the working
- 1Slant = √(3² + 4²) = 5
- 2Volume = ⅓ π 3² × 4 = 37.699112
Formula
V = ⅓πr²h, l = √(r² + h²)How it works
A cone holds exactly one third of the cylinder that encloses it.
Example
A radius of 3 and height of 4 give a volume of 37.70 and a slant height of 5.
About the Cone Calculator
Volume, slant height and surface area of a cone. It sits in the Geometry section of NWS Calc, a free collection of calculators that run entirely in your browser. There is no signup, no paywall and no tracking — open the page, enter your numbers, get an answer.
Frequently asked questions
- Is the Cone Calculator free to use?
- Yes. Every calculator on NWS Calc is completely free, with no signup, no usage limits and no ads.
- Does my data leave my device?
- No. The Cone Calculator runs entirely in your browser using JavaScript. Nothing you type is uploaded, logged or stored on a server.
- Can I use the Cone Calculator on my phone?
- Yes. The page is fully responsive and works in any modern mobile or desktop browser — there is nothing to install.
- What else is in Geometry?
- Area, perimeter, volume and surface area for every common shape. You can browse the full Geometry category for related calculators.