Cone Calculator
Volume & Surface Area ⚡
Enter the base radius and height of a cone to instantly calculate its volume, slant height, and surface areas.
Enter the base radius and height of a cone to instantly calculate its volume, slant height, and surface areas.
Slant Height: l = √(r² + h²)
Volume: V = (1/3) × π × r² × h
Base Area: A_base = π × r²
Lateral Surface Area: LSA = π × r × l
Total Surface Area: TSA = π × r × (r + l)
What is the slant height?
The slant height is the distance from the apex (tip) of the cone to any point on the edge of the base, measured along the surface. It is calculated using Pythagoras: l = √(r² + h²).
How does a cone's volume compare to a cylinder?
A cone has exactly one-third the volume of a cylinder with the same base radius and height. This is why the cone formula is (1/3)πr²h.