Pump Selection & Head Planning
Build a transparent base total dynamic head from static head, line losses and required pressure head, with an optional margin.
Use the Pump Head Calculator
Build a transparent base total dynamic head from static head, line losses and required pressure head, with an optional margin.
Calculations happen locally in your browser. ToolLott does not send these inputs to a server for this tool.
Preliminary engineering screening only. It does not replace project-specific design, applicable codes/standards, manufacturer data, transient/fatigue studies, geotechnical or site assessment, professional review or independent verification.
How to use it
Replace the worked-example values with actual project data. Review the intermediate quantities and visible assumptions before using the result elsewhere.
How the Pump Head Calculator works
Build a transparent base total dynamic head from static head, line losses and required pressure head, with an optional margin. The methodology below exposes the production equation, a QA-verified worked example and the boundary between this screen and detailed design.
Calculation breakdown
ToolLott will explain the current inputs and displayed result here.
Total dynamic head screening
The production engine evaluates TDH = static head + friction/fitting loss + required pressure head; design = TDH x (1+margin). It begins by combine the entered signed static head, friction/fitting head loss and required pressure head., then confirm the base total head is positive., and finally apply the optional additional head margin. This keeps the calculation auditable instead of hiding design assumptions behind a single number.
TDH = static head + friction/fitting loss + required pressure head; design = TDH x (1+margin)ToolLott evaluates the relationship using the entered units and full numeric precision before display rounding.
| Symbol / input | Meaning | Unit |
|---|---|---|
staticHead | Static head / lift (m) | user input |
frictionLoss | Friction + fitting loss (m) | user input |
pressureHead | Required pressure head (m) | user input |
margin | Additional head margin (%) | user input |
Step-by-step method
- Combine the entered signed static head, friction/fitting head loss and required pressure head.
- Confirm the base total head is positive.
- Apply the optional additional head margin.
Worked example
Maya, a project engineer, needs to transfer water 18 m vertically through a line expected to lose 7 m to friction and fittings.
Example inputs
- Static head / lift (m): 18
- Friction + fitting loss (m): 7
- Required pressure head (m): 0
- Additional head margin (%): 0
Calculation / processing
Base head = 18 + 7 + 0 = 25 m.Margin = 0%, so no additional head is added.The reported base total dynamic head is 25 m.
Use the result as a screening or quantity-planning value and compare it with the project criteria, manufacturer data and applicable engineering requirements before making a design or procurement decision.
Assumptions
- The entered values are representative of the condition being screened and use the units shown on the page.
- The equation models only the stated relationship; omitted system effects are not silently estimated.
Limitations
- This page is not engineering certification and does not replace applicable standards, design loads, manufacturer data, site investigation or competent professional review.
- Results can change materially when real geometry, losses, transients, material properties, duty cycles, safety factors or regulatory criteria differ from the simplified inputs.
Common questions
Is this a final engineering design?
No. It is a transparent screening calculation using the entered assumptions and the stated equation.
Why does the page show assumptions and limitations?
Engineering formulas are only valid within their modelling assumptions; exposing them helps users decide what additional design checks are required.
Should I use the rounded displayed value in later design work?
Use suitable calculation precision and the governing project/standard requirements rather than relying on display rounding alone.
Methodology sources
Related ToolLott tools
A realistic way Maya could use this tool
Maya is a project engineer.
Maya needs to transfer water 18 m vertically through a line expected to lose 7 m to friction and fittings.
For the worked run, Maya enters static head = 18; friction loss = 7; pressure head = 0; margin = 0. With those exact values, the page produces Base total dynamic head: 25 m; every input remains visible so the result can be traced back to the scenario data.
The practical output is Base total dynamic head: 25 m. That gives Maya a concrete basis to transfer water 18 m vertically through a line expected to lose 7 m to friction and fittings. The page also keeps this limitation explicit: Preliminary screening/planning calculation only.
Fictional scenario using realistic example data. For Ready tools, the worked result is tied to the tested example shown in the tool. Replace the figures with your own inputs and independently verify important professional, financial, legal, health or safety decisions.
What this calculator is for
Use it to build a transparent base total dynamic head from static head, line losses and required pressure head, with an optional margin.
It sits within ToolLott’s Hydraulic collection, where you can also calculate NPSH, pipe friction loss, pipe velocity, pump head, pump power, reservoir capacity and water-hammer screening values.
Pump Selection & Head Planning
Turn the hydraulic pieces into a target head for checking against a pump curve.
The target must be checked against the actual duty flow, pump curve, fittings and system conditions.