Cone Calculator
Find the volume, slant height, and surface area of a right circular cone from its base radius and height.
Inputs explained
- Base radius — Radius of the circular base.
- Height — Perpendicular height from base to apex.
How to use it
- Fill in the fields above — each input has a hint describing exactly what to enter
- Press Calculate to get your result instantly, right on this page
- Copy the result, save the tool to favorites, or share and embed it anywhere
Understanding the result
Example: A cone with radius 3 and height 4 has volume ≈ 37.70, slant height 5, and total surface area ≈ 75.40.
Frequently asked questions
What's the difference between slant height and the cone's height? The height is the straight vertical distance from base to apex, while the slant height runs along the cone's outer surface from the base edge to the apex — it's always longer than the vertical height.
Does the total surface area include the base circle? Yes, total surface area adds the lateral (side) surface area to the area of the circular base; if you only want the curved surface, subtract the base area from the total.
Is the Cone Calculator free to use? Yes — it is completely free, with no sign-up, no download and no usage limits. You can use it as often as you need.
Is my data private? Yes. The calculation runs entirely in your browser — the values you enter are never sent to our servers, stored or shared with anyone.
What information do I need? Just the following: Base radius, Height. Each field includes a hint explaining exactly what to enter.
Can I use it on my phone? Yes — the tool is fully responsive and works on any device, and the same calculator is available in the EasyWorkCalcs mobile app.
Privacy
Everything you enter into the Cone Calculator is processed entirely in your browser. Nothing is uploaded, stored or shared — your data stays on your device.