Math Geometry

Free Online Calculator

Sphere Volume Calculator

Free online Sphere Volume Calculator with instant results.

Calculate the volume of a sphere using its radius.

V = (4/3)πr³
Enter measurements to calculate.

What the variables mean

V is volume; r is radius measured from the center to the surface. The output is expressed in cubic units.

Worked example

For radius 3 cm, V = (4/3) × π × 3³ = 36π ≈ 113.0973 cm³.

Frequently asked questions

What is the formula using diameter?

V = πd³/6, where d is diameter.

What units does sphere volume use?

Cubic units, such as cm³, m³, in³, or ft³.

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