﻿ SPHERE: circumference, surface area, enclosed volume of sphere (formula and on-line calculator)

### Calculation

Enter a value to any field - the others are calculated themselves. If you change a value in any field, the others are automatically recalculated.
For decimals you can enter either points or commas
as decimal marks (but only one decimal point in a value).

 Radius r = m Diameter d = m Circumference O = m Surface area P = m² Enclosed volume V = m³ round to 6 digits nm µm mm cm dm m km

The result will be in the units that you enter into the fields.
For example: if you enter kilometres, calculation will be also in kilometres.

If appears an error NaN, check whether you enter to the field
a correct value, ie. without any letters and other characters.

### Formula

 Diameter d = 2 × r [m] Circumference O = π × d = 2 × π × r [m] Surface area P = π × d² = 4 × π × r² [m²] Enclosed volume V = 1/6 π × d³ = 4/3 π × r³ [m³] d … diameter = 2 × radius

r … radius = ½ of diameter

S … center of sphere

o … axis

### Sphere and Cube

Space/volume diagonal of cube (u3) = diameter of circumscribed sphere
Length of side edge of cube (a) = diameter of inscribed sphere

### Calculation of sphere online 