Cone Frustum
Volume and surface of a truncated cone.
V = ⅓πh(R²+Rr+r²). Includes both bases. Unlike Cone the top is a circle, not a point. Unlike Cylinder the radii may differ.
What Cone Frustum does
V = ⅓πh(R²+Rr+r²). Includes both bases. Unlike Cone the top is a circle, not a point. Unlike Cylinder the radii may differ.
Cone Frustum sits in the Calculate group on purpose. It is not Cone Calculator (Volume, surface, and slant from radius and height.) and not Cylinder Calculator (Volume, total surface, and lateral area.). Choose this page when you need Volume and surface of a truncated cone. If you stretch Cone Frustum into a neighbor’s job, the result will look wrong even though the site chrome looks the same.
How to use Cone Frustum
- Confirm you need Cone Frustum, not Cone Calculator (Volume, surface, and slant from radius and height.). Address: /frustum.
- Enter the numbers or dates Cone Frustum uses. Volume and surface of a truncated cone.
- Read the result as Cone Frustum defines it — not as Cylinder Calculator (Volume, total surface, and lateral area.). V = ⅓πh(R²+Rr+r²). Includes both bases. Unlike Cone the top is a circle, not a point. Unlike Cylinder the radii may differ.
- Cone Frustum is an estimate in the browser, not professional advice. Radii and height ≥ 0. Includes both bases. Not a full cone or a cylinder.
- Need a different formula? Try Cylinder Calculator (Volume, total surface, and lateral area.) instead of stretching Cone Frustum.
When not to use Cone Frustum
Skip Cone Frustum when a neighbor tool matches better — start with Cone Calculator or Cylinder Calculator — or when the description already warns the job will fail. In the tool’s own words: V = ⅓πh(R²+Rr+r²). Includes both bases. Unlike Cone the top is a circle, not a point. Unlike Cylinder the radii may differ.
Questions about Cone Frustum
- What does Cone Frustum do that other Calculate pages on this site do not?
- V = ⅓πh(R²+Rr+r²). Includes both bases. Unlike Cone the top is a circle, not a point. Unlike Cylinder the radii may differ. Short version: Volume and surface of a truncated cone.
- Does Cone Frustum upload my file or text to Tool-You servers?
- No. Cone Frustum runs in this browser tab. Files stay on the device. Limit note: Radii and height ≥ 0. Includes both bases. Not a full cone or a cylinder.
- Should I use Cone Calculator instead of Cone Frustum?
- Use Cone Frustum when you need Volume and surface of a truncated cone. Use Cone Calculator when you need Volume, surface, and slant from radius and height. They share a category (Calculate) but not the same job.
- What are the limits of Cone Frustum?
- Radii and height ≥ 0. Includes both bases. Not a full cone or a cylinder. Also: V = ⅓πh(R²+Rr+r²). Includes both bases. Unlike Cone the top is a circle, not a point. Unlike Cylinder the radii may differ.