Sphere Calculator
Fill in the value and the answer updates as you type.
How the Sphere Calculator works
Volume = 4⁄3 × π × r³. Surface area = 4 × π × r².
Inputs and results
The Sphere Calculator takes 1 input and gives 3 results.
What you enter
- Radius — starts at 5.
What you get
- Volume
- Surface area
- Diameter
Example: Sphere Calculator with the starting values
With radius 5, the calculator returns:
| Volume | 523.6 |
|---|---|
| Surface area | 314.16 |
| Diameter | 10 |
Change any value above and the results update straight away.
Sphere Calculator FAQ
How do I use the Sphere Calculator?
Enter radius in the fields, then read volume, surface area and diameter in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Sphere Calculator calculate?
Volume and surface area from the radius. It returns volume, surface area and diameter from the 1 value you provide.
What values does the Sphere Calculator start with?
It opens with radius 5 so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Sphere Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Sphere Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.