Divide the diameter by 2 to get the radius. Then use the standard formula for the volume of a sphere.
A sphere with a diameter of 6cm has a volume of 113.1 cm3
The volume of a sphere with a diameter of 8cm is about 268cm3
The volume of a sphere with a diameter of 25cm is about 8181.2cm3
The volume of a sphere with a diameter of 5.5m is about 87.1m3
The centre of a sphere does not provide enough information. You also need its diameter or radius.
A sphere with a diameter of 20 cm has a volume of 4,188.79 cm3
The volume of a sphere with a diameter of 7 meters is about 179.6m3
A 2-inch diameter sphere has a volume of 4.189 cubic inchesA 1-inch diameter sphere has a volume of 0.5236 cubic inches.
The diameter of this sphere is 20 mm
The volume of a sphere that has a 14-meter diameter is 1,437 m3
A sphere with a diameter of 16 inches has a volume of 2,144.66 cubic inches.