The BendBoss conduit bending app

BendBoss is a conduit bending calculator for electricians that runs on iPhone, Android and computers. It covers 15 bend calculations, takes measurements on a glove-friendly fraction keypad, and shows every result in tape-measure sixteenths with a diagram and step-by-step instructions. It costs $25.00 once — no subscription, no ads, no account.

The 15 calculators

1. Offset — marks + shrink, any angle
2. Matching Bends Offset — second bend lands on an exact spot
3. Matching Centers Offset — offset centered on a mark
4. Rolling Offset — rise + roll, roll angle included
5. 3-Point Saddle — 45° center, 22½° sides
6. 4-Point Saddle — flat top for wide obstructions
7. 90° Stub-Up — take-up for your bender
8. Kick — one bend off a 90
9. Matching Bend Kick — kick bend on an exact spot
10. Matching Center Kick — kick centered on a mark
11. Parallel Offsets — every run's marks, spacing kept true
12. Parallel Runs — Spacing — mixed conduit sizes in one rack
13. Parallel Kicks — a rack of kicks, back or forward
14. Compound 90° — two-bend 90 around an obstruction
15. Segmented 90° — big-radius sweeps in equal shots

Also in the app

• Stick Layout — several bends on one stick (90s, offsets, 3-point saddles, kicks). Every mark comes back measured from the same end, with shrink and gain figured, plus the cut length for your stock stick.
• Conduit Fill — the NEC Chapter 9 fill check: add every conductor, mixed sizes and insulation types, grounds included, and compare against the Table 1 limit for your conduit's Table 4 area.
• Bender Specs — the built-in benders with their published numbers and sources, plus your own benders saved on your phone.

What's in every calculator

• Fraction keypad — whole inches plus 1/16″ fraction keys, big enough for gloves. No sliders.
• Tape-ready answers — marks in sixteenths, measured from the end of the conduit.
• A one-line “why” under every result — for example, “distance to the obstruction + 1 1/2″ shrink” — next to the full step-by-step math.
• Shrink and multiplier labeled separately, with the shrink already added where it belongs.
• Bend diagrams and step-by-step walkthroughs, plus warnings when a bend won't fit the shoe.
• Pick your bender — Greenlee, Klein, IDEAL or Gardner Bender. The app uses that maker's published take-up and its bend order where the makers' guides differ. If a maker doesn't publish a take-up for a size, the app says so and uses the standard value — check the number on your shoe.
• Your own benders — save your own take-up and radius; they plug straight into Stub-Up and Stick Layout.
• English and Spanish — switch with one tap.

How you get it

1. Pay $25.00 once through PayPal.
2. PayPal sends you back to your install page.
3. Open the app and add it to your home screen: on iPhone, Share → “Add to Home Screen”; on Android, Chrome's “Install app.”
4. Open it once while you have signal. After that it works offline — basements, tunnels, dead zones — because the app is saved on your phone.

What it doesn't do (yet)

• Built-in take-ups are for EMT hand benders. Rigid and IMC use the same bend math, but enter your own bender's take-up.
• No PVC heat-bending, no mechanical or hydraulic bender charts in this version.
• It's a calculator, not a code book — check radius and support rules against the NEC and your inspector.