Conduit Bending Calculator

Hand-bender layout for offsets, rolling offsets, stub-ups, back-to-back 90s, 3- and 4-point saddles, kicks, and gain. Enter inches as decimals or fractions (12-3/8). Results are rounded to 1/16". Multipliers, shrink, and take-up are the Klein Tools and Greenlee field-table values. Your bender's stamped marks and instructions govern. See the bending how-to.

Use exact trig (csc θ and tan ½θ) instead of the field-table multipliers

1 · Offset

Offset depth (in)AngleDistance to obstacle (in, optional)

2 · Rolling offset

Rise (in)Roll (in)Angle

3 · 90° stub-up

Conduit / benderStub height (in)Take-up override (in, optional)

4 · Back-to-back 90s & cut length

Conduit / benderFirst stub height (in)Back-to-back distance (in)Second stub height (in)Gain per 90 (in, from your bender)

Leave gain blank to use the estimate from section 5.

5 · Gain of a 90

EMT sizeCenterline radius (in)

The radius defaults to the NEC Chapter 9 Table 2 minimum for one-shot and full-shoe bends. A hand bender's radius is often larger, so use the gain stamped on your bender when it has one.

6 · 3-point saddle

Obstacle height (in)Center bendDistance to obstacle center (in)

7 · 4-point saddle

Obstacle height (in)AngleDistance to near edge (in)Obstacle width (in)

8 · Kick

Rise / distance off wall (in)Kick angle

NEC: keep bends free of kinks and flattening at or above the Chapter 9 Table 2 radius. Bends between pull points total no more than 360° (four quarter bends). For EMT that is 358.24 and 358.26; other raceways have matching sections. Count every offset and saddle bend toward the 360°.

Reference only — not engineering, legal, or code-compliance advice. Results are estimates for qualified persons and must be verified against the NEC edition adopted where the work is done (your selected edition), manufacturer instructions, and the local AHJ. Use is subject to the Terms of Use & Disclaimer. — Morningstar Electric LLC