Tank Volume Calculator

Category: Various Measurements/Units
- April 20, 2025
| |

Calculate the volume and capacity of various tank shapes including cylindrical, rectangular, and spherical tanks for water, fuel, and other liquids.

Output Options

About Tank Volume Calculations

Tank volume calculators help determine the capacity and current content of various tank shapes. The calculations account for different geometries and fill levels.

Volume Formulas
  • Cylindrical Tank: V = π × r² × h
  • Rectangular Tank: V = l × w × h
  • Spherical Tank: V = (4/3) × π × r³
  • Horizontal Cylinder: Complex calculation based on fill height (partial cylinder)
Common Conversion Factors
  • 1 cubic foot = 7.48052 gallons (U.S.)
  • 1 cubic meter = 264.172 gallons (U.S.)
  • 1 cubic meter = 1,000 liters
  • 1 gallon (U.S.) = 3.78541 liters
  • 1 gallon (Imperial) = 4.54609 liters
  • 1 barrel (oil) = 42 gallons (U.S.)

What Is the Tank Volume Calculator?

The Tank Volume Calculator is a practical online tool that helps you calculate the total capacity and current fill level of different tank shapes. Whether you're managing water, fuel, oil, or any other liquid, this calculator gives you fast and accurate results by converting measurements into useful volume and weight outputs.

Formulas Used in the Calculator

Cylindrical Tank: V = π × r² × h

Rectangular Tank: V = l × w × h

Spherical Tank: V = (4/3) × π × r³

Horizontal Cylindrical Tank: Volume is based on fill level and uses circular segment area calculations.

How to Use the Calculator

To get the most accurate results, follow these steps:

  • Select your tank shape from the available tabs: Cylindrical, Rectangular, Spherical, or Horizontal Cylinder.
  • Enter the necessary dimensions such as diameter, height, length, or width. You can choose the units—feet, inches, meters, or centimeters.
  • If you want to calculate partially filled tanks, enter the fill level and select its unit or use a percentage.
  • Pick the liquid stored in the tank. Common options like water, diesel, or milk are included. You can also enter a custom liquid density.
  • Click "Calculate" to view the total and filled volumes, fill percentage, and estimated liquid weight.
  • View the results in multiple units like gallons, liters, cubic feet, and barrels with the built-in unit conversion tool.

Why This Tool Is Useful

This calculator is ideal for homeowners, farmers, engineers, and facility managers who need quick and precise tank volume calculations. It's also helpful in industries dealing with storage, transportation, and usage of liquids.

Here’s how it helps:

  • Saves time by automating volume and weight calculations.
  • Reduces manual errors with reliable mathematical formulas.
  • Converts measurements easily with the built-in conversion calculator and measurement converter.
  • Gives insights into how much liquid your tank can store or currently holds.
  • Supports real-world decision making—know when to refill, how much you can transport, or estimate costs based on volume.

Volume and Unit Conversion Made Easy

With one click, the calculator shows results in multiple formats. You can use it as a:

  • conversion helper for switching between cubic feet and gallons
  • value conversion tool for comparing liters to barrels
  • quick unit conversion tool for planning and logistics

It works seamlessly with other tools such as Convert Gallons to Liters, Convert mL to L, or Convert Cubic Feet to Cubic Yards—all part of making measurement and unit conversion more convenient.

Frequently Asked Questions (FAQ)

What if my tank is not completely full?
You can enter the current fill level, and the calculator will determine how much liquid is in the tank and what percentage of the tank is full.

Can I use custom liquids?
Yes. If your liquid is not listed, select "Custom Liquid" and input its density to get an accurate weight.

Which units are supported?
The calculator supports feet, inches, meters, and centimeters for input. Results are displayed in gallons, liters, cubic feet, cubic meters, and more.

What if I don’t know the fill level?
Leave the fill level empty to calculate the tank's total volume only.

Final Thoughts

The Tank Volume Calculator simplifies measurement tasks, eliminates guesswork, and saves time. Whether you're checking your home water tank or planning logistics for industrial fluid storage, it's a reliable measurement and unit conversion tool designed for practical needs.