Sphere surface area
Geometry / FREE CALCULATOR
Calculate the external surface area of a sphere.
Your answer starts here.
Enter your values and select Calculate to see the result and any available breakdown.
How to use this calculator
- Enter radius. Use the unit shown beside the field.
- Select Calculate and review the result. Select Reset to restore the example inputs.
How the calculation works
4*3.141592653589793*Radius*Radius
Worked example
Radius = 3. Result: 113.097 square units.
Understand your result
Calculate the external surface area of a sphere. The result is expressed in square units.
Assumptions and limitations
Assumes a complete sphere. Results are rounded for display.
Questions about this tool
What does this tool calculate?
Calculate the external surface area of a sphere.
What should I check before using the answer?
Assumes a complete sphere.
Related guides
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