Free Volume Calculator 2026 to calculate the volume of cubes, cylinders, cones and spheres in cubic meters, feet, liters and gallons. Fast and accurate 3D shape volume tool.
Volume calculation methodology reviewed for engineering accuracy. All formulas follow standard geometric principles and unit conversion standards.
Geometry formulas, unit consistency, material density values, and cost estimation accuracy reviewed by VIP Calculator engineering team.
Material costs are estimates based on average market prices. Actual costs may vary by location, supplier, and quality. For critical engineering applications, consult a licensed professional.
Last reviewed: January 2026
All calculations and visualizations are processed locally in your browser. No data is stored or transmitted.
Calculate volume for various 3D shapes.
Cube: Side³
Rectangular Prism: Length × Width × Height
Cylinder: π × Radius² × Height
Sphere: (4/3) × π × Radius³
Cone: (1/3) × π × Radius² × Height
The calculator automatically converts between cubic feet, cubic meters, liters, gallons, and other common volume units.
For rectangular pools, multiply length × width × average depth. For circular pools, use the cylinder formula with radius and depth.
One cubic foot equals approximately 7.48 gallons. This is useful for calculating water tank capacities.
For irregular shapes, break them into regular shapes, calculate each volume, and add them together. Or use water displacement method for physical objects.