Volume Calculator

Calculate the volume of 3D shapes including cubes, cylinders, spheres, cones, and more. Includes unit conversions for gallons and liters.

Result

Fill in the fields above, then press Calculate.

A volume calculator computes the volume of common 3D shapes such as cubes, cylinders, spheres, and cones, with built-in unit conversions for gallons and liters.

Select the 3D shape (e.g. cube, rectangular prism, cylinder, sphere, cone) from the dropdown. Choose your units for input and output. Enter the required dimensions (e.g. side length, radius, height) as prompted. Click Calculate to see the volume, the formula used, and conversions to other units such as gallons or liters.

Examples

Swimming Pool Volume

A 20ft × 10ft × 5ft rectangular pool has a volume of 1,000 ft³, which is approximately 7,480 gallons.

Frequently Asked Questions

What is the formula for the volume of a cylinder?
The volume of a cylinder is V = πr²h, where r is the radius of the base and h is the height.
Related Calculators
Area Calculator
Surface Area Calculator
Circle Calculator
Triangle Calculator

Quick Tips

  • •Convert units to the same system before entering values.
  • •Double-check your inputs — small errors in dimensions are amplified in volume calculations (cubic scaling).
  • •Use the unit conversion output to quickly compare volumes in gallons, liters, or cubic units.