What formulas does this calculator use?

Volume = (4/3) × π × radius³; Surface area = 4 × π × radius².

How is a sphere different from a circle?

A circle is 2D; a sphere is its 3D equivalent, every surface point equidistant from center.

Sphere Calculator - CalculatorLabs.net

Sphere Calculator

A sphere is a perfectly round 3D solid where every point on its surface is the same distance (the radius) from its center — think of a ball, a marble, or a planet.

Radius (r)

Instant Result

Volume -

Surface Area -

Diameter -

Great-Circle Circumference -

What Is a Sphere Calculator?

A sphere is a perfectly round 3D solid where every point on its surface is the same distance (the radius) from its center — think of a ball, a marble, or a planet. This calculator finds a sphere's volume, surface area, diameter, and the circumference of its great circle from a single radius value.

How to Use This Sphere Calculator

Measure or note the sphere's radius (the distance from the center to the surface).
Enter the radius value into the Radius field above.
Click Calculate to instantly get the volume, surface area, diameter, and circumference.
Use the same unit throughout — the volume result will be in cubic units and the area in square units of whatever unit you entered.

Formula

Volume = (4/3) × π × r³
Surface Area = 4 × π × r²
Diameter = 2 × r
Circumference = 2 × π × r

Worked Example

Suppose a sphere has a radius of 5 cm. Volume = (4/3) × π × 5³ ≈ 523.60 cm³. Surface Area = 4 × π × 5² ≈ 314.16 cm². Diameter = 10 cm, and the great-circle circumference ≈ 31.42 cm.