# Circumference of a Sphere

## Method #1 – Circumference from the volume

### Formula – How to calculate the circumference of a sphere from the volume

Radius = 3√((3 x Volume) ÷ (4 x π))

Step 2: Calculate the circumference

Circumference = π2r

##### Example

A sphere has a volume of 10

Radius = 3√((3 x 10) ÷ (4 x π))

Radius = 3√((3 x 10) ÷ (4 x 3.14159))

Circumference = π x 2 x 1.33651

Circumference = 3.14159 x 2 x 1.33651

Circumference = 8.39753

## Method #2 – Circumference from the surface area

### Formula – How to calculate the circumference of a sphere from the surface area

Step 2: Calculate the circumference

Circumference = π2r

##### Example

A sphere has a surface area of 10

Radius = √(10 ÷ (4 x 3.14159))

Circumference = π x 2 x 0.89206

Circumference = 3.13159 x 2 x 0.89206

Circumference = 5.60497

## Method #3 – Circumference from the radius

### Formula – How to calculate the circumference of a sphere from the radius

Circumference = π2r

##### Example

A sphere has a radius of 10

Circumference = π x 2 x 10

Circumference = 3.14159 x 2 x 10

Circumference = 62.8318

## Method #4 – Circumference from the diameter

### Formula – How to calculate the circumference of a sphere from the diameter

Circumference = πd

##### Example

A sphere has a diameter of 10

Circumference = π x 10

Circumference = 3.14159 x 10

Circumference = 31.4159