Compressed Air Pipe Pressure Drop Calculator
Pressure drop in a compressed-air line via the empirical Harris formula.
Keep total drop under ~0.3 bar (4–5 psi) from compressor to point of use — every 1 psi of loss costs roughly 0.5% in compressor energy.
Formula
Note: Empirical sizing formula for steel pipe; verify critical headers with a full Darcy or AGA calculation.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Compressed Air Pipe Pressure Drop Calculator is a free compressed air pressure drop for process, mechanical and water engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Compressed Air Pipe Pressure Drop Calculator
Pressure drop in a compressed-air line via the empirical Harris formula. The calculation implements ΔP = 0.1025·L·Q^1.85 / (3600·(P/P_atm)·d⁵) (L ft, Q scfm, d in) (CAGI Handbook / US DOE Compressed Air Tip Sheet #3). Keep total drop under ~0.3 bar (4–5 psi) from compressor to point of use — every 1 psi of loss costs roughly 0.5% in compressor energy.
How to use Compressed Air Pipe Pressure Drop Calculator
- 1Enter Free air delivery in SCFM.
- 2Enter Pipe length in m.
- 3Enter Pipe inner diameter in mm.
- 4Enter Line pressure (gauge) in kPa(g).
- 5Read Pressure drop instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Compressed Air Pipe Pressure Drop Calculator?
- ✓Implements the standard formula — ΔP = 0.1025·L·Q^1.85 / (3600·(P/P_atm)·d⁵) (L ft, Q scfm, d in)
- ✓Reference cited on-page: CAGI Handbook / US DOE Compressed Air Tip Sheet #3
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Compressed Air Pipe Pressure Drop Calculator use?+
It computes ΔP = 0.1025·L·Q^1.85 / (3600·(P/P_atm)·d⁵) (L ft, Q scfm, d in), per CAGI Handbook / US DOE Compressed Air Tip Sheet #3. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Keep total drop under ~0.3 bar (4–5 psi) from compressor to point of use — every 1 psi of loss costs roughly 0.5% in compressor energy. Note: Empirical sizing formula for steel pipe; verify critical headers with a full Darcy or AGA calculation.
Does this work for any fluid?+
Yes — density and viscosity are inputs (with common fluids suggested in the field hints), so the same physics applies to water, oils, gases and process fluids. Compute always runs in SI internally, so unit mix-ups can't corrupt the result.
Is the Compressed Air Pipe Pressure Drop Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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