geometry calculator

Spherical Cap Surface Area Calculator

Spherical Cap Surface Area Calculator for shape comparison, sketching, and formula checking when you want a fixed formula answer without improvising the math by hand.

Important Use Notice

Informational calculator only. Verify important outputs independently before legal, tax, medical, engineering, safety-critical, contractual, employment, or compliance use.

Estimate

Enter job values, review the estimate, then use the decision hints before ordering or quoting.

Estimate Results

Enter values to see the result.

Formula

surface area = 2 x pi x R x h

Multiply the sphere radius by the cap height and scale by 2 pi.

This is the curved cap area, not the base circle.

Example

3 units, 8 units gives Surface Area 150. 8.

Check

Mixing units, scales, or coordinate conventions across cap height, sphere radius before calculating surface area.
Rounding too early when the result still feeds another geometry or algebra step.

Next Step

Next Calc

Sphere Surface Area Calculator

Next: sphere surface area.

Next Calc

Spherical Cap Volume Calculator

Next: spherical cap volume.

Next Calc

Cone Surface Area Calculator

This cone surface area calculator helps when radius, slant height are already known and you want the surface area quickly.