Vertical Tank Freeboard calculator.
Convert a known liquid addition into geometric fill height and overflow.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Assumes a vertical straight cylinder with no displaced internals. It reports geometric exceedance rather than selecting a safe fill level.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Internal diameter
- 2 m
- Internal cylindrical height
- 2 m
- Known current liquid volume
- 3.14 m³
- Proposed addition
- 3.14 m³
Geometric spare volume after addition: 0 m³
Geometric headroom is not a recommended operating fill limit. Internal displacements must already be excluded from supplied capacity or handled separately.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
Assumes a vertical straight cylinder with no displaced internals. It reports geometric exceedance rather than selecting a safe fill level.
Dimensions, quantities, prices, timing and product properties are supplied by you. This tool does not select construction specifications or assess structural, electrical or hydraulic suitability.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.