Sphere Volume Calculator
Enter the radius of your sphere — get volume, surface area, diameter and circumference together.
Enter values — the result will show here live.
How to use
- Enter the radius (if you know the diameter, half of it is the radius).
- Volume and surface area will appear in the result.
Note: Formulas: Volume = (4/3) pi r³, Surface area = 4 pi r². The result will use the same unit as your radius.
Frequently Asked Questions (FAQ)
What does the Sphere Volume Calculator do?
Enter the radius of your sphere and it instantly shows the volume, surface area, diameter and circumference.
What inputs does the sphere calculator need?
Just the radius. Volume, surface area, diameter and circumference are all calculated from it.
What formula is used?
Volume uses V = 4/3 x pi x r cubed, surface area uses A = 4 x pi x r squared, and diameter and circumference follow from the radius.
How fast are the results?
Instant. The volume, surface area, diameter and circumference update as soon as you enter the radius.