Calculate capsule or spherocylinder surface area from radius, diameter, cylindrical height or total length, with reverse solving for a missing size.
This calculator finds the surface area of a capsule from the radius or diameter and the cylindrical height or the total length. It works for capsule, pill, and spherocylinder shapes.
surface area of a capsule
radius or diameter
cylindrical height
total length
The calculator can also work in reverse when the surface area is already known and you want to solve for a missing radius, diameter, height, or length. This is useful in geometry, 3D modelling, and technical calculations.
$$A= 2\pi r(2r+h)$$
The surface area of a capsule is made up of the lateral area of a cylinder and the area of two hemispheres. The calculator applies the correct formula automatically from the dimensions you enter.
You can enter the radius or diameter together with the cylindrical height or the total length. If the surface area is known, the calculator can also work backwards to find a missing value.
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