MARINE / Rectangular Tank Volume Calculator

Rectangular Tank Volume Calculator

Calculate total capacity, liquid volume, remaining volume and fill percentage for a rectangular tank.

Inputs

Updates as you type

Length

Tank width

Tank height

Liquid height

Results

Decimal places

Liquid volume

14.4m³

Results
Liquid volume	14,400 L
Liquid volume	3,804.078 US gal
Total tank volume	24 m³
Total tank volume	24,000 L
Total tank volume	6,340.129 US gal
Remaining volume	9.6 m³
Remaining volume	9,600 L
Remaining volume	2,536.052 US gal
Fill percentage	60 %

Overview

Calculate total capacity, liquid volume, remaining volume and fill percentage for a rectangular tank.

Formula

Vtotal = L × W × H
Vliquid = L × W × h
Vremaining = L × W × (H − h)
Fill [%] = 100h/H

Example

A 4 m × 3 m × 2 m tank with 1.2 m liquid height has 24 m³ total capacity, 14.4 m³ liquid, 9.6 m³ remaining and 60% fill.

How to use

Check the units, enter the required values and select the available calculation options.
Results update immediately. Correct any highlighted input before using the result.
Choose display precision, copy the result or share the current inputs. Reset restores the example values.

Engineering notes

Use internal dimensions. Assumes a level floor and vertical walls; structural members, piping, sumps and vessel trim are excluded.
For actual ship tanks, use approved sounding/ullage tables. Geometric remaining volume is not a safe filling limit.

Frequently asked questions FAQ

Can liquid height be zero?

Yes. An empty tank has zero liquid volume and 0% fill. A liquid height above the tank height is rejected.

Does display precision change the calculation?

No. Rounding is applied only to displayed results, not intermediate calculations. Small nonzero values use scientific notation. Consider the precision of the original measurements when interpreting results.

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