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Pressure Drop & Pipe Sizing Calculator

Undersized pipes or long hose runs rob your tools of pressure and waste energy. Enter your airflow, pipe run, and fittings below to instantly calculate pressure drop — plus see which pipe diameter keeps losses under the industry-recommended 1 PSI per 100 feet. Save money by sizing it right the first time.

Common Setups
Your System
Total CFM your compressor delivers
Total run from compressor to furthest drop
For energy waste estimate
Fittings & Valves (adds equivalent pipe length)

Equivalent length from fittings: 0 ft — Total effective length: 100 ft

Pressure Drop Result
All Pipe Sizes Compared

Pressure drop for each available size at your current settings. Green = recommended.

Nominal SizeInner Dia.Velocity (ft/s)Δ PressureStatus

Frequently Asked Questions

Estimates based on the EXAIR empirical compressed air pressure drop formula. Pipe inner diameters from ASME B36.10 (Schedule 40 steel), ASTM B88 (Copper Type L), and manufacturer specs. Fitting equivalent lengths from Crane Technical Paper 410 and industry standards. Actual pressure drop may vary based on pipe condition, altitude, temperature, and moisture content. Always confirm with a professional for critical installations.

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