Water Tank Calculator

Calculate water tank volume for rectangular or cylindrical tanks. Enter dimensions and get results in m³, liters and gallons.

Tank shape Rectangular / Square Cylindrical (vertical)

Units Meters (m) Feet (ft)

Length

Width

Depth / Height

Diameter

Height

Fill % (optional)

Fill details and click Calculate to see results.

Notes: 1 m³ = 1000 liters. 1 US gallon = 3.78541 liters.

HTML Code (for embedding)

A trimmed copy of the HTML structure is shown — click copy to copy the result text (not the whole page).

<!-- Paste your water tank calculator markup here -->

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Tip: embed the script part at the bottom of your page or in a separate JS file.

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