Zerdly

Hydraulic Pump Power Calculator

Calculate hydraulic pump power from flow rate and pressure for pump and motor sizing with this free engineering calculator in your browser.

100% FreeRuns in your browserIntermediate
How to use this calculator

Enter Values

Minimum 0

Minimum 0

Range 1–100

Enter your values and press Calculate to see results.

Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.

How to use this calculator

  1. Enter the flow rate (L/min) and pressure (bar).
  2. Add efficiency for the input power.

How it works

Hydraulic power (kW) ≈ flow(L/min) × pressure(bar) ÷ 600, divided by efficiency.

Worked example

20 L/min at 150 bar. = 5 kW (at 100% efficiency).

Common mistakes

  • Forgetting efficiency — input power is higher than output.
  • Mixing units — use L/min and bar for this formula.

Frequently asked questions

Is this input or output power?

At 100% it's the hydraulic (output) power. Enter a real efficiency to estimate the input (motor) power.

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Cite this tool

Zerdly. (2026). Hydraulic Pump Power Calculator. Retrieved from https://www.zerdly.com/tools/hydraulic-pump-power-calculator/

Tip: Enter any known values to calculate the remaining results.

All calculations run in your browser. Your inputs are never saved or transmitted.