Plumbing Offset Calculator

Quickly calculate pipe lengths for plumbing pipe offsets

Quickly calculate the cut piece for 90, 45, and 22.5 degree offsets. Works for copper, black iron, and some plastic pipe. Simply choose the material, pipe diameter, and fitting angle, and at least on of the vertical or horizontal offsets. Both offsets can be used together for a rolling offset, or one left blank for a standard offset.

Note that not all plastic fittings are the same between manufacturers. New data will be added in future updates, but for accurate results select the proper fitting brand name for plastic pipe.

Author is not responsible for plumbing errors or wasted fittings resulting from use of this app.