BendPro: Conduit Bender Calc

Conduit bending calculator built for working electricians. Offsets, saddles, stub-ups, kicks, rolling offsets — every common bend with the math, marks, and a clean diagram on one screen. Take-up and gain values for Klein, Greenlee, Ideal and Gardner Bender baked in. NEC Chapter 9 wire fill table included.

OFFSET BEND CALCULATOR

Enter offset depth, pick an angle (10°, 22.5°, 30°, 45°, 60°), and BendPro shows the distance between bends, the shrink, the multiplier and a labelled diagram. Tap any saved offset to recalculate at a new angle.

3-POINT AND 4-POINT SADDLES

Saddle around an obstruction without guessing. Enter saddle depth and obstruction width — BendPro returns the centre and outer bend angles, the mark spacing, and the shrink. The diagram shows obstruction, marks, and the angle of every bend.

90° STUB-UP CALCULATOR

Pick your bender (Klein, Greenlee, Ideal, Gardner Bender) and conduit size — take-up is read straight from the manufacturer table. Subtract from your stub height to get the mark from the end of the conduit. Custom take-up if your bender isn't listed.

KICK AND ROLLING OFFSET

Enter kick height and distance — BendPro returns the kick angle, conduit travel and a diagram. Rolling offsets handle a horizontal AND vertical run in the same bend, with roll angle and true offset clearly labelled.

WIRE FILL — NEC CHAPTER 9

Pick conduit material (EMT, IMC, Rigid, PVC) and size, add THHN/THWN or XHHW conductors, see the fill percentage with the NEC limit (53/31/40 %) clearly marked. Over-fill is flagged in red.

QUICK REFERENCE

Take-up and gain tables for every supported bender, plus the offset multiplier table (10° → 6.0, 22.5° → 2.6, 30° → 2.0, 45° → 1.4, 60° → 1.2) — the values you keep on a sticker on your bender, on your phone.

HISTORY AND FAVORITES

Every calculation is saved automatically. Bookmark the ones you re-run. Tap any saved entry to open it back up, change a value, share the result with the apprentice.

INCHES OR METRIC

Imperial fractions ("12-3/16\"") by default. Toggle metric in settings for millimetres. Bender deductions are converted on the fly.

DARK MODE

Default dark theme — easier on the eyes in a basement, in an attic, on a roof at sunset.

PREMIUM UPGRADE

Remove all ads, unlimited favorites, unlimited history, and diagram export — send a clean annotated bend diagram straight to your crew. One-time unlock, no subscription.

PRIVACY

Every calculation lives on your device. No accounts, no cloud, no tracking. Uninstall removes everything.

BendPro is for electricians who want answers fast — not another reference book full of tables. Verify every measurement against the deduction stamped on your bender shoe before bending. For estimation only.