EMT Bending Reference
1" EMT Bending Calculator
Take-up, deduct, gain, and stub-up marks for 1 inch EMT, with the interactive bender. Offset and saddle multipliers are the same on every conduit size, so this page covers what actually changes with 1 inch pipe.
1" EMT Bender Constants
The four constants that change with conduit size, for all standard EMT hand-bender sizes. Take-up equals deduct on standard benders.
1" EMT Stub-Up Marks
For a 90-degree stub-up, mark the conduit at the stub height minus the 8" take-up, then bend up with the arrow on your mark.
| Stub Height | Mark From End |
|---|---|
| 6" | -2" |
| 10" | 2" |
| 12" | 4" |
| 18" | 10" |
| 24" | 16" |
Mark = stub height − 8" take-up. Verify with a test bend on your bender.
Bend 1" EMT
The calculator is set to 1 inch EMT. Pick a bend type and enter your measurements for exact marks, shrink, and an SVG diagram.
Frequently Asked Questions
What is the take-up for 1 inch EMT?
The take-up for 1 inch EMT on a standard hand bender is 8 inches. Take-up is the distance from the bender's arrow to the back of a finished 90-degree bend, so you subtract it from the desired stub height to find your mark. For a 12-inch stub in 1 inch EMT, the mark goes at 12 − 8 = 4 inches from the end of the conduit.
What is the deduct for a 1 inch EMT 90?
The deduct for a 1 inch EMT 90-degree bend equals the take-up, 8 inches, on a standard hand bender. Deduct and take-up are the same number: measure your stub height, subtract 8, and place the mark there. Some benders stamp this value on the shoe, but verify it with a test bend on your specific tool.
How much gain does a 1 inch EMT 90 have?
A 90-degree bend in 1 inch EMT has a gain of 2.47 inches. Gain is the material the curved bend saves compared to two straight pieces meeting at a square corner. When you figure the developed length of a bent piece, subtract 2.47 inches for each 90 in 1 inch EMT. Larger conduit has a larger radius and more gain.
Do offset multipliers change for 1 inch EMT?
No. Offset multipliers and shrink per inch depend only on the bend angle, not the conduit size. A 30-degree offset uses a multiplier of 2.0 and 1/4 inch of shrink per inch whether you bend 1 inch EMT or any other size. Only take-up, deduct, radius, and gain change with conduit size. See the offset multiplier chart for the angle-based values.
Other Sizes & References
1/2" EMT Bending
Take-up 5", gain 1.72", and stub marks for 1/2 inch pipe.
3/4" EMT Bending
Take-up 6", gain 1.93", and stub marks for 3/4 inch pipe.
1-1/4" EMT Bending
Take-up 11", gain 3.11", and stub marks for 1-1/4 inch pipe.
Offset Multiplier Chart
Multipliers and shrink per inch (the same on every size).
Conduit Gain Chart
Gain by size and the developed-length formula.