Volume

Calculate cylinder volume as circular base area times height, while keeping cubic volume units separate from square surface units.

Calculate sphere volume and surface area from radius, with diameter-to-radius conversion, cubic-unit output, and radius growth checks.

Calculate cone volume as one third of the matching cylinder with the same circular base radius and vertical height.

Convert volume units including liters to gallons, gallons to liters, ml to ounces, cups to ml, cubic feet, cubic meters, pints, and quarts.