Pressure Drop in Compressed Air Piping

Compressed Air Pipe Pressure Drop Calculator

Δp =

450 × ( V / 0.06 )^1.85 × L

d⁵ × P_max

Δp: Pressure drop (bar)

V: Total air flow rate (m³/min)

L: Total pipe length (m)

P_max: Maximum operating pressure (bar)

d: Internal pipe diameter (mm)

Enter air flow rate, pipe length, operating pressure, and internal diameter to calculate the pressure drop along the pipeline (bar).

Convert flow from l/s to m³/min (optional)

Enter the flow rate in liters per second (l/s). The value will be automatically filled into the m³/min field below.

Total air flow rate (m³/min)*

If your flow unit is different (l/s, CFM, etc.), please use the conversion box above.

Total pipe length (m)*

Including equivalent length of valves, elbows, tees, etc.
➜ Equivalent length table for compressed air fittings

Maximum operating pressure (bar)*

Internal pipe diameter (mm)*

You may enter the internal diameter manually, select a DIN 2440 steel pipe DN, or select a PU hose size to auto-fill the standard internal diameter.

Type	Outer Diameter OD (mm)	Inner Diameter ID (mm)	Wall Thickness (mm)
PU 3.2 × 2.0	3.2	2.0	0.60
PU 4 × 2.5	4.0	2.5	0.75
PU 6 × 4	6.0	4.0	1.00
PU 8 × 5	8.0	5.0	1.50
PU 10 × 6.5	10.0	6.5	1.75
PU 12 × 8	12.0	8.0	2.00
PU 16 × 11	16.0	11.0	2.50