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Tank Calibration Calculator

Liquid volume by level for 4 tank shapes. Accurate formulas, 1 cm step strapping table, CSV export.

What is tank calibration (strapping)?

Tank calibration produces a strapping table that converts a liquid level (in centimetres) to a volume (litres). Without one you cannot know how much fuel sits in a service-station or terminal tank, because most geometries are non-linear — especially horizontal cylinders with ellipsoidal heads. This calculator gives an estimate from nominal dimensions; for official accounting (commercial or excise) a physical calibration with metrology certification is required.

Tank parameters

Units:

Result

Total tank volume—
Formula—

The calculator uses nominal dimensions. Real tanks have construction tolerances, pressure/temperature deformations, may sit at an angle. Official accounting requires physical volumetric calibration with verification.

Strapping table

Volume at that level
—
Level, mmVolume, L

Need to calibrate tanks regularly?

Order the KPR10-01 calibration kit from Gerkon — complete equipment for volumetric tank calibration: reference measuring vessels, dosing pump, fittings, hoses. Pays for itself in 2-3 calibrations vs hiring a third-party lab.

View KPR10-01 →

Need an official strapping table with metrology certificate?

Gerkon performs full tank calibration as a service on-site: measure real dimensions, build 1 cm step table, issue UkrMetrTestStandart verification protocol. Suitable for commercial and excise accounting.

Order service →

Frequently asked questions

What is the difference between flat, hemispherical and ellipsoidal heads?
Flat heads — simplest type, volume equals cylinder body. Hemispherical — hemispheres of radius equal to tank radius (two heads make one full sphere). Ellipsoidal — industry standard for horizontal service-station tankers: head depth typically 25-40% of radius. Ellipsoidal heads add 5-10% volume to the cylindrical body.
Why does volume grow non-linearly with level in a horizontal cylinder?
The cross-section area depends on level — narrow at bottom and top (geometrically a circular segment), maximum at the middle. So 10 cm of level at the bottom contain much less volume than 10 cm at the middle. Vertical cylinders and rectangular tanks have linear behaviour.
How does the horizontal-cylinder formula work?
V = L × (R² × arccos((R−h)/R) − (R−h) × √(2Rh − h²)), where R is radius, L length, h level from bottom. This is the classic circular segment area times length. Filled-head volume is added on top.
Can I use this calculation as an official strapping table?
No. This is for estimation only. An official strapping table (for fuel accounting, excise, commercial settlements) is produced by physical volumetric calibration — filling with reference measuring vessels. Gerkon provides this as an on-site service with UkrMetrTestStandart verification protocol.
What table step is required?
Standard step is 1 cm. Very large tanks (>1000 m³) may use 2-5 cm. The calculator builds 1 cm step tables compliant with DSTU GOST 8.346 for petroleum products. CSV export opens in Excel where you can add temperature/tilt corrections.