geometry calculator

Cylinder Surface Area Calculator

Use this cylinder surface area calculator for classroom geometry, sketches, and quick plan checks when you want a direct answer without rewriting the formula 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 radius x (radius + height)

Add the two circular ends and the curved lateral area.

This is the total outer area of a closed cylinder.

Example

4 units, 10 units gives Surface Area 351. 86.

Check

Mixing units or scales across radius, height before calculating surface area.
Rounding too early when the surface area still feeds another step.

Next Step