Pipe Offsets – Plumbing Math


To calculate a pipe offset using 45 degree and 22 1/2 degree elbows use the following chart.

Pipe offset





To use this chart simply multiply the known side by the corresponding number to find the missing value.

Side to findspacerKnown sidespacer45 degree offsetsspacer22 1/2 degree offsets
travelspaceroffsetspacer1.414spacer2.613
offsetspacertravelspacer.707spacer.383
runspaceroffsetspacer1.0spacer2.414
offsetspacerrunspacer1.0spacer.414
travelspacerrunspacer1.414spacer1.082
runspacertravelspacer.707spacer.924