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Construction & home

Rectangular Tank Capacity Calculator

Find internal tank capacity from inside dimensions.

Editable waste and coverage assumptionsCheck supplier specifications

Project measurements

Runs on your device

MATERIAL ESTIMATE

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter length, width, height.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Capacity in liters = length × width × height × 1000.

A WORKED EXAMPLE

Using length = 5 m, width = 4 m, height = 2.5 m, the result is 50000 L. Change these example inputs to match your task; use the method above to check each step.

What to keep in mind

Use internal dimensions. Does not account for freeboard or internal equipment. A material-quantity estimate, not a structural design or building-code check. Confirm site measurements, supplier coverage and waste before ordering.

Common questions

Which inputs does this calculation need?

Find internal tank capacity from inside dimensions. Enter length in m, width in m, height in m. The filled example is editable and is not a saved personal record.

How should I interpret the result?

Use internal dimensions. Does not account for freeboard or internal equipment. A material-quantity estimate, not a structural design or building-code check. Confirm site measurements, supplier coverage and waste before ordering.

Methodology maintained by ClarityKit. How these tools are built and checked.