Direct answer

What does the sphere calculator solve?

The sphere calculator solves volume, surface area, radius, and diameter from radius, diameter, volume, or surface area. It uses formulas such as $V = \frac{4}{3} π r^{3}$ , $S A = 4 π r^{2}$ , $d = 2 r$ , and reverse radius formulas. It also shows reverse steps for volume or surface area inputs.

Quick formula table

Calculator formulas

Calculator	Formula	What it finds
Sphere	$V = \frac{4}{3} π r^{3}$	Volume
Sphere	$S A = 4 π r^{2}$	Surface area
Sphere	$d = 2 r$	Diameter

Calculator

Sphere Calculator

Results include the answer, unit, formula, and calculation steps.

Formula reference

Related formula pages

FAQ

Sphere Calculator FAQ

Can the sphere calculator use diameter?

Yes. Select diameter and the calculator converts it to radius first.

What formula does it use for volume?

It uses $V = \frac{4}{3} π r^{3}$ .

What formula does it use for surface area?

It uses $S A = 4 π r^{2}$ .