Tank Volume & Fill Calculator Pro (USA)

Tank Volume & Fill Calculator Pro (USA)

Precise Liquid Capacity Measurement in US Gallons

Rectangular
Horizontal Cylinder
Vertical Cylinder
ft
in
ft
in
ft
in
ft
in
How deep is the liquid currently?
Total Volume (Capacity)
0 gal
0 ft³
Filled Volume
0 gal
0% Full

How to Use This Tank Calculator

This tool is designed specifically for US users. Select your tank shape (Rectangular, Horizontal Cylinder, or Vertical Cylinder). Enter your dimensions in Feet and Inches for precision. The calculator instantly converts your measurements and provides the total capacity in US Gallons and Cubic Feet.

Common Tank Formulas Used

We use standard geometric formulas to ensure accuracy for your engineering or storage needs.

1. Rectangular Tank

Volume = Length × Width × Height

2. Vertical Cylinder Tank

Volume = π × r² × Height

Where r is the radius (half of width/diameter).

3. Horizontal Cylinder Tank

Calculating partial fill in a horizontal tank is complex. Our tool uses the segment area formula:

Area = r² × cos⁻¹((r-h)/r) – (r-h) × √(2rh – h²)

This ensures you know exactly how much liquid is remaining when the tank is on its side.

Why Use Our Pro Calculator?

Many online tools only use decimal feet. We understand that in the USA, measurements are often taken in feet and inches (e.g., 10 feet 6 inches). Our calculator handles this conversion automatically, reducing errors and saving you time. Whether you are checking water tank levels, fuel oil storage, or chemical capacity, this tool provides the reliability you need.

Calculation Updated