Sphere Surface Area Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the radius.
- Press Calculate.
How it works
Surface area = 4 × π × radius².
Worked example
radius 1 m. ≈ 12.57 m².
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.