Vessel Volume and Level — online
Volume, mass and level for horizontal and vertical vessels with any common head — plus transmitter %, alarm volumes, fill and drain time and a strapping table.
Yellow cells are inputs; orange cells are choices; blue cells choose the unit. Select or hover over an input to see its help in the box below the toolbar. The sheet is the same as the Excel tool (USD 29) — the Guide, method and references are in the Excel file.
What this vessel volume and level calculator does
Know what is in the vessel, how much room is left and how long until the next alarm. Volume, mass and level for horizontal and vertical vessels with any common head — plus transmitter %, alarm volumes, fill and drain time and a strapping table.
- Every common head. Flat, 2:1 ellipsoidal, hemispherical, torispherical (ASME F&D or any crown and knuckle), custom-depth ellipsoidal and conical bottoms.
- Horizontal or vertical. Level from the lowest point or the bottom tangent line; separate top and bottom heads on vertical vessels.
- Level transmitter %. Turns a reading in % of span into height, volume and mass, from the tap heights.
- Alarm volumes. Volume at LL, L, NLL, H and HH, with surge, hold-up and working volumes and the time to each alarm at the net flow.
- Fill and drain time. Time to fill or empty at your inflow and outflow.
- Strapping table and chart. Volume and mass at every 5 % of height, with a volume-against-height chart on a print-ready report.
What you enter
- Orientation
- Head type
- Top head type
- Inside diameter
- Shell length, tangent to tangent
- Head depth (custom ellipsoidal head)
- Top head depth (custom ellipsoidal head)
- Torispherical crown radius (% of D)
- Torispherical knuckle radius (% of D)
- Cone half-angle (from the vessel axis)
- Cone small-end (outlet) diameter
- Height measured from
- Level given as
- Liquid height
What you get
- Total volume (shell + heads)
- Straight shell volume
- Volume of each head
- Bottom head volume
- Top head volume
- Overall length (tangent length + both head depths)
- Overall inside height (bottom apex to top apex)
- Liquid height (from the zero point)
- Liquid height as % of the vessel height
- Liquid volume
- Liquid volume as % of the total volume
- Free volume (vapour space / ullage)
- Liquid mass
- Net inflow (inflow − outflow)
How it was checked
Perry's Handbook Tables 10-64 and 10-66 reproduced; ASME F&D head 0.0810 D³ (Perry 0.0809 D³); 156 geometry cases match an independent model.
Related
- Free quick calculator — a simpler free version for a fast estimate.
- Vessel Volume and Level Excel tool — USD 29, keep the workbook and its Guide.
- All 40 online tools
Questions
Is the vessel volume and level calculator free?
You can enter and check all your data free. The full results, findings and printable sheet are unlocked with a 3-run pack (USD 9), a monthly subscription to all 40 online tools (USD 15) or a yearly one (USD 99).
Are the results the same as the Excel tool?
Yes. The online tool runs the formulas of the Vessel Volume and Level Excel workbook, checked cell by cell against the Excel file.
Which units can I use?
SI, US customary and British units — choose the unit next to each input.