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Conduit bending calculator
Offsets, stub-ups and saddles, marked from the end.
Open the Conduit Bending toolFree. Runs in your browser, no account, and keeps working offline.
What it does
Pick the bend, enter the height and the distance to the obstruction, and the calculator gives the marks to make on the conduit, measured from its end. Offsets use the exact multiplier and shrink for the angle you choose, where pocket charts round them.
For 90° stub-ups it takes off the bender's take-up (the usual EMT figures are filled in; check the number printed on your bender). Back-to-back 90s and three-point saddles over a pipe are covered too.
The marks account for shrink, so an offset finishes where the obstruction starts instead of an inch and a half short.
Worked example
A 6″ offset with 30° bends, the obstruction starting 30″ from the end of the conduit.
- Distance between marks (6 × multiplier)
- 12″
- Shrink
- 1 5/8″
- First mark from the end
- 19 5/8″
- Second mark from the end
- 31 5/8″
The second mark sits past the obstruction by the shrink, so the offset finishes where it starts.
Questions
What is the multiplier for a 30° offset?
2.00: the marks are twice the offset height apart. A 45° offset uses 1.41 and a 22 1/2° offset 2.61. See the bending chart for every angle.
What is shrink in conduit bending?
An offset takes up length, so the conduit ends up shorter than it was laid out. The calculator adds the shrink to the second mark so the offset lands where you need it.
What is the take-up on a 1/2″ EMT bender?
Commonly 5″ on a 1/2″ EMT hand bender, but check the number printed on yours and enter it.