Free Online Calculators

Tank Volume Calculator

Tank Volume - Calculate construction and material requirements accurately.

Understanding Tank Volume

Calculating the capacity of a tank depends on its shape. While most tanks are cylinders (like water heaters or propane tanks), some are rectangular or oval. The result is usually needed in gallons or liters.

The Circle Formula

Volume = π × Radius² × Length
Gallons = Cubic Feet × 7.48

Remember: The radius is half of the diameter. If you measure the width of the tank, divide by 2 first!

Vertical vs. Horizontal

Vertical Tank

Standing upright (like a silo or water heater).

  • Fill Level: Linear relationship. If it's half full height-wise, it's half full volume-wise.
  • Easy Math: Height directly correlates to volume.

Horizontal Tank

Lying on its side (like a propane or oil tank).

  • Fill Level: Complex! Half height is half volume, but 1/4 height is LESS than 1/4 volume due to the curve.
  • Dipstick: Requires a special chart to read correctly.

Frequently Asked Questions

How to use the Tank Volume Calculator

Follow these steps to get accurate results with the tank volume calculator.

  1. 1

    Enter your values

    Fill in the required input fields above. Units can be changed where available.

  2. 2

    Click Calculate

    Press the calculate button to compute results instantly in your browser.

  3. 3

    Review your results

    View the computed outputs and use related calculators for deeper analysis.

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