Marine Irregular Tank Volume Calculator
Estimate tank volume with the trapezoidal rule from user-supplied cross-sectional areas at equally spaced stations.
A QUICK WALKTHROUGH
How to use this tool
- Enter the common positive spacing between stations in metres.
- Enter 2–100 cross-sectional areas in order, including both end stations.
- Calculate m³ and litres, then copy or download the report.
Formula and units
Volume (m³) = spacing (m) × [first area/2 + sum of interior areas + last area/2]. Litres = volume (m³) × 1000.
Scope
All stations must have the same spacing. You supply measured local areas in m²; the tool does not infer tank shape. The trapezoidal approximation models area linearly between stations and does not certify capacity or usable contents.
Local processing
Inputs stay in your browser. The report includes inputs, formulas and scope.
GOOD TO KNOW
Common questions
Can I enter unequal station gaps?
No. One spacing applies to every adjacent pair. This tool does not integrate stations with unequal gaps.