Truebend: Conduit Bending

509 Electric

About this app

Truebend is a fast, no-nonsense conduit bending calculator. Pick a bend, punch in your field measurements, and get the marks, shrink, total length, and bend angle in seconds — no wheel charts, no math on the back of a scrap of pipe.

WHAT IT DOES (FREE)
- 90-degree stub-up — enter the stub height, get the mark from the end and total length.
- 2-point offset — enter rise, first mark, and angle; get distance-between-marks and shrink.
- 3-point saddle — pick the center bend angle, get both side marks.
- Angle presets (10, 22.5, 30, 45, 60 degrees) plus fine +/- degree nudges.
- Live diagrams that redraw as you type so the layout matches what you punch in.
- Fractional-inch marks that round to your chosen precision.
- Save a default bender, conduit size, and material so every bend starts ready.
- Dark mode and high-contrast text for bright sun or a dim panel room.
- Share a bend with its exact values to a coworker.

PRO UNLOCK
- Seven more bends — back-to-back 90s, 4-point saddle, kick (compound 90), rolling (3D) offset, parallel offset, concentric parallel runs, and segmented large-radius sweeps.
- Degree Level — a zeroable on-screen level driven by your phone's motion sensors, with a Hold/Live lock so you can capture an angle before you move the phone.
- Square Align — use the compass to line conduit square or parallel to a wall or building reference.

BENDER LIBRARY
Take-up and deduct values come from manufacturer manuals for Greenlee (Site-Rite hand benders 840/841/842 and the 555), Klein Tools (51606/51607), Gardner Bender (930B/931B/932), plus larger shop benders. Material options cover EMT, IMC, rigid (RMC), and aluminum across common trade sizes from 1/2 inch to 2 inch, where your bender has published shoe data.

WHO IT'S FOR
Journeymen and apprentices bending EMT on the deck, estimators sanity-checking a run, and inspectors checking layout — anyone who wants clean bend marks fast.

ACCURACY
Marks are driven by verified manufacturer take-up and deduct data; any gain-based figures are clearly labeled as estimates. Truebend handles the layout math — you still follow the NEC on the pipe: keep bends within the minimum radius (Chapter 9, Table 2) and no more than 360 degrees total between pull points (358.26 for EMT, with the matching .26 rules for IMC, rigid, and PVC). Always verify against your bender, the NEC edition adopted in your jurisdiction, and job conditions.

PRICE
Truebend is free to download for its core bends (90 stub-up, 2-point offset, 3-point saddle). A one-time Pro Unlock ($4.99 — no subscription, no renewals) adds seven advanced bends plus the Degree Level and Square Align field tools. Buy once, own it forever; Restore Purchases brings Pro back on a new device.

PRIVACY
Every calculation runs on your device. Truebend collects no personal data, requires no account, and works fully offline. Motion and compass readings for Degree Level and Square Align are used only while those tools are open — never stored, never sent.

Built by 509 Electric, a licensed Washington electrical contractor (EL01) in Yakima — field tools made by people who wire buildings for a living. Part of the True suite of NEC field calculators for electricians.

What’s new

Initial closed testing release. Conduit bending calculator (offsets, rolling offsets) for electricians.