How do I calculate tank volume?

Multiply the internal cross-sectional area by the tank length or height. For cylinders use πr²h; for rectangles use length × width × height.

Does this include partial fill?

Use the size-spacing tank tool for advanced partial-fill horizontal cylinder math. This page focuses on full-capacity estimates for standard shapes.

Estimate liquid capacity for common tank shapes in gallons and liters.

Tank Volume Calculator

Estimate total tank capacity and filled volume in Gallons and Liters. All inputs must be in Inches.

Tank Shape

Diameter / Width (in)

Height (in)

Current Liquid Depth (in) - Optional

Leave blank to just calculate total capacity.

Share This Calculator

Help others discover this useful tool

Copy Link

https://www.thecalcs.com/calculators/math-science/tank-volume-calculator

Share on Social Media