Sphere Calculator
Calculate the volume and surface area of a sphere from its radius.
Calculate
Enter your values below.
Result
Volume
0
Surface area
0
Formula used
Volume = 4/3 × π × r³, Surface area = 4πr²
Example: Radius 5 → volume ≈ 523.6, surface area ≈ 314.16.
How to use this calculator
- Enter Radius.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What if I have the diameter instead of the radius?
Divide the diameter by 2 first.
What units is the volume in?
Your linear unit, cubed.
How accurate is the calculation?
It uses JavaScript's full-precision value of π.
What real-world objects are spheres?
Balls, planets, and bearings are common real-world approximations of spheres.