Volume Calculator
Compute volume of boxes, cylinders, spheres, cones and tanks.
How to use this tool
- Pick a shape (box, cylinder, sphere, cone, tank).
- Enter dimensions in any unit.
- Read the volume in multiple units.
How it works
Each solid uses its standard formula; volumetric results convert across liters, gallons and cubic units.
Tips
- For an aquarium, buy the pump for the gross volume — decor displaces water.
- Horizontal cylinder tanks need the fill-depth option for part-loads.
Limitations
Assumes regular geometric shapes and ignores wall thickness.
Frequently asked questions
How is cylinder volume found?
V = pi x r² x h. Same math works for pipes and tanks.
How do I get gallons or liters?
The tool converts the result into liters, gallons (US/UK), cubic feet and cubic meters.
Can I do partial tank levels?
For a horizontal cylinder you can enter the liquid depth for a partial-fill volume.