Hydraulic power calculator

Estimate theoretical hydraulic power and output at an assumed total efficiency.

Your estimate

Enter your inputs to calculate. JavaScript must be enabled.

How the calculation works

Theoretical power (kW) = flow (L/min) × pressure difference (bar) ÷ 600 Estimated output = theoretical power × efficiency

Efficiency is a decimal in the formula: 80% = 0.8. The inputs should describe the same operating point and available implement circuit. US flow uses US liquid gallons, not imperial gallons. The estimated output represents a hydraulic motor output under the assumed total efficiency.

A pump’s total flow is not automatically available to the implement. This tool does not model hose losses, heat, duty cycle or simultaneous functions, and does not establish circuit or machine compatibility.

Read the related guide

Before you commit

Check what you have confirmed. Print this sheet with open questions visible.

Identify flow available to the implement circuit
Use pressure differential at the operating point
Confirm valve, coupler and return requirements

Formula & reference sources

Parker Hannifin — Hydraulic motor power formula, page 34

See our methodology for unit definitions and evidence boundaries.