ClarityHow to use this tool
- Enter radius.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
Input reference and sample values
Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.
| Input | Format and units | Sample |
|---|---|---|
| Radius | Numeric value. Zero or positive. | 3 |
Result for these sample inputs
113.097336 cubic units
- Surface area
- 113.097336
- Diameter
- 6
Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.
The method, explained
Volume = 4πr³/3. Surface area = 4πr². Diameter = 2r.
A WORKED EXAMPLE
A radius of 3 gives volume 36π, about 113.10 cubic units, and surface area 36π square units.
What to keep in mind
Assumes a complete sphere. Hollow shells, spherical caps and flattened shapes need different formulas.
Common questions
Can I enter diameter instead?
Divide it by two before entering the radius.
Why do area and volume use different units?
Area measures surface in square units; volume measures enclosed space in cubic units.
Methodology maintained by ClarityKit. How these tools are built and checked.