# Pump Head Calculator

> Calculate pump head step by step: H = Δz + h_f + (P_d − P_s) ÷ (ρg).

Page: https://freecalculator.tech/tools/pump-head-calculator
Last reviewed: 2026-11-03

## Formula

H = Δz + h_f + (P_d − P_s) ÷ (ρg).

- Velocity head difference is assumed small and not included.
- Friction head comes from the pressure drop calculator (head loss).
- Gauge pressures in kPa.
- H = Δz + h_f + (P_d − P_s) ÷ (ρg).
- Inputs used: Static lift (discharge − suction level), Friction head loss, Discharge pressure required (gauge), Suction pressure (gauge), Fluid density.

## Inputs

- Static lift (discharge − suction level)
- Friction head loss
- Discharge pressure required (gauge)
- Suction pressure (gauge)
- Fluid density

## Worked example: 15 m lift plus 4 m friction

Open tanks at both ends.
1. Pressure head = 0.
2. H = 15 + 4 + 0 = 19 m.

## Common questions

### Why is head in metres, not pressure?

Head is independent of fluid density for a given pump, which is why pump curves use it.

### Where do I get friction loss?

Use the pressure drop calculator and read the head loss line, including fittings.

### Is NPSH included?

No. Net positive suction head must be checked separately to avoid cavitation.

### How do I use the Pump Head Calculator?

Enter the required values for Static lift (discharge − suction level), Friction head loss, Discharge pressure required (gauge), Suction pressure (gauge), Fluid density. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Pump Head Calculator use?

H = Δz + h_f + (P_d − P_s) ÷ (ρg). The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.

### Can the Pump Head Calculator be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- Velocity head neglected.
- Steady flow.
- No NPSH check.
- Results are estimates for planning and learning. Real designs, installations and bids must be checked by a qualified, licensed professional against the codes that apply where you work.
- The result depends on the values you enter for this pump head calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- U.S. Department of Energy — https://www.energy.gov/eere/amo/articles/improving-pumping-system-performance-sourcebook-industry-second-edition

## Cite this page

- APA: Free Calculator. (2026, November 3). Pump Head Calculator. https://freecalculator.tech/tools/pump-head-calculator
- MLA: "Pump Head Calculator." Free Calculator, 3 Nov. 2026, https://freecalculator.tech/tools/pump-head-calculator.
- Link: Pump Head Calculator — Free Calculator, https://freecalculator.tech/tools/pump-head-calculator