Estimate a practical compressed air line size using SCFM, line length, operating pressure, and target velocity for pneumatic machine design, troubleshooting, and plant air distribution decisions.
This is a starting-point sizing tool. It helps you avoid undersized lines that create pressure loss, slow cylinders, unstable tooling, and wasted debug time.
Line sizing should come after you know the cylinder force, air demand, and motion needs. This is the step that helps the full system actually deliver consistent performance.
Start with force, estimate air demand, check speed, then size the line to support the system properly.
Estimate a recommended compressed air pipe size using SCFM, equivalent line length, operating pressure, and a target air velocity. This is a practical starting-point tool for pneumatic system design, machine drops, valve supply checks, and early automation layout work.
Before sizing the line, estimate expected demand with the air consumption calculator.
Good general-purpose machine starting point using a practical velocity target.
Shows how longer supply runs push you toward more conservative sizing.
Useful when several devices or cylinders create a much higher total air demand.
This calculator uses a practical sizing method based on air velocity and a simple line-length penalty. It is intended for early design and troubleshooting. Final sizing should also consider fittings, quick disconnects, regulators, filters, hose restrictions, branch drops, simultaneous demand, and allowable pressure drop at peak flow. The existing sizing logic was preserved from your current page. :contentReference[oaicite:1]{index=1}
Save setups, reload prior inputs, and reuse common checks.
Real-world pneumatic performance is not just about pipe diameter. Regulators, filter assemblies, push-to-connect fittings, solenoid valves, manifolds, and flexible hose sections can all choke flow long before the main pipe does.
Once the line is sized, you have a much better picture of whether the pneumatic system can actually support the machine reliably without hidden pressure-loss problems.
Use this first if you still need to confirm the cylinder is correctly sized for the job.
Use this before line sizing to estimate the actual air demand the system must support.
Use this to confirm whether the system can still meet motion timing once the rest of the airflow picture is understood.
This calculator is typically used during machine design or troubleshooting to verify that air lines can support the required flow without causing pressure drop or slow actuator performance. While the calculation is straightforward, real-world performance is heavily affected by fittings, regulators, valves, hose sections, and system layout.
A system with multiple cylinders may calculate to require 80 SCFM, but if the supply line is undersized or has long runs with many fittings, pressure can drop significantly at peak demand.
This often leads to slow cylinders, inconsistent motion, and extended debug time during startup.
Air line sizing should follow force, cylinder selection, and air consumption calculations. A properly sized line helps stabilize pressure and improves consistency across the machine.
This is one of the last checks that turns a calculator result into a practical system design decision.
Use this as a starting point, then get help if the machine has high flow demand, long runs, multiple drops, or critical pressure requirements.
These pages work together as one pneumatic sizing workflow.