Cylinder Calculator
Enter the radius (half the diameter) and the height of the cylinder.
Cylinder
Formulas
V = πr²h
lateral area = 2πrh
total area = 2πr(r + h)
Worked example
A rain barrel 60 cm across and 90 cm tall
- r = 30 cm
- V = π × 30² × 90 ≈ 254,469 cm³
- 1,000 cm³ = 1 L
It holds about 254 liters.