Compressed Air Pipes - Fittings and Pressure Loss

Fittings in compressed air pipe lines and equivalent length pressure drop. This calculator helps determine the equivalent pipe length for various fittings in compressed air systems using SI and Imperial units.

Compressed Air Pipes - Fittings and Pressure Loss

Pressure drop in compressed air pipe line fittings can be expressed as equivalent length in meters of pipe line.

How to Use

Select your unit system (SI or Imperial), choose the nominal pipe size and fitting type to find the equivalent pipe length.

Calculator

Inputs

Unit System

Nominal Pipe Size (mm) - SI

Nominal Pipe Size (inches) - Imperial

Fitting Type

Results

Equivalent Pipe Length-- m or ft

Fitting Type	15 mm	20 mm	25 mm	32 mm	40 mm	50 mm	65 mm	80 mm	100 mm	125 mm
90° Bend	0.15	0.2	0.25	0.35	0.5	0.6	0.8	1.0	1.2	1.5
90° Elbow	0.25	0.4	0.5	0.65	0.8	1.0	1.4	1.8	2.4	3.2
Tee - Run	0.2	0.3	0.4	0.5	0.7	0.85	1.1	1.3	1.6	2.0
Tee - Side Outlet	0.5	0.7	1.4	1.8	2.4	2.7	3.6	4.6	5.7	7.0

SI Units Reference Table

Equivalent Pipe Length (m) for various fittings and pipe sizes in SI units.

Example

A 90° bend in a 50 mm pipe equals approximately 0.6 m of straight pipe line in terms of pressure drop.

Fitting Type	1/2"	3/4"	1"	1 1/4"	1 1/2"	2"	2 1/2"	3"	4"	5"
90° Bend	0.5	0.7	0.8	1.2	1.7	2.0	2.6	3.3	4.0	5.0
90° Elbow	0.8	1.3	1.7	2.1	2.6	3.3	4.6	5.9	7.9	10.6
Tee - Run	0.7	1.0	1.3	1.7	2.3	2.8	4.4	4.3	5.3	6.6
Tee - Side Outlet	1.7	2.3	4.6	5.9	7.9	8.9	11.9	15.1	18.8	23.1

Imperial Units Reference Table

Equivalent Pipe Length (ft) for various fittings and pipe sizes in Imperial units.