BendMarks: Conduit Bender NEC
Voltage Drop, Fill, Calc, Wire
$14.99 · Designed for iPad. Not verified for macOS.
Shows its work. Every bend, fill, and voltage drop expands into the NEC formula with your exact numbers. 100% offline. One-time purchase, no subscription.
The conduit and code calculator that shows its work.
Built for electricians, apprentices, and journeymen who want to know why the math works — not just the answer.
Every bend, every fill, every drop expands into the formula and a labeled diagram.
— FEATURES —
• Conduit Bending — offset, rolling offset, 3-point saddle, 4-point saddle, 90° stub-up, and kick bends with labeled diagrams and exact mark distances
• Voltage Drop — single-phase and three-phase, copper or aluminum, with pass/fail vs. NEC 3% and 5% targets
• Conduit Fill — NEC Chapter 9 percentages with cross-section visualization for any wire mix
• Box Fill — NEC 314.16(B) calculations for conductors, devices, grounds, and clamps
• Show Your Work — every result expands the formula with substituted values and a plain-English explanation, so you learn the math as you use it
• Glove-Friendly — oversized tap targets, fraction-native input, sunlight high-contrast mode for the field
• Recents — last 20 calculations one tap away
• NEC Code Cycles — switch between 2017, 2020, and 2023
• Fully Offline — zero network calls, zero analytics, zero tracking. Your jobs stay on your phone.
• One-Time Purchase — $14.99 once. No ads. No subscription. No upgrades you have to buy later.
Built by people who believe an apprentice should never be handed a black box. Hand them BendMarks instead — it teaches every step.
Sources: Benfield's Conduit Bending and Fabrication, Ugly's Electrical References, NEC 2023 Chapter 9. All NEC values are facts cited to their section; this app is a learning and field reference tool, not a substitute for code review or professional judgment. Always verify against your local code and a licensed electrician.
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The developer does not collect any data from this app.
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Information
- Seller
- BigBalli Consulting llc
- Size
- 1.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026, BigBalli Consulting
