Electrical Calc Elite™
The fully updateable, NEC®-compliant electrical code calculator.
Electrical
Electrical Calc Elite™ is the electrician's code calculator that follows the NEC® edition your inspector enforces. Size wire, check voltage drop, fill conduit and size motor circuits — offline, in seconds, with the table it came from printed on the answer.
Ten editions of the National Electrical Code® are built in — NEC® 2026*, 2023, 2020, 2017, 2014, 2011, 2008, 2005, 2002 and 1999 — and every table, correction factor and code reference follows the one you select.
Built for electricians, contractors, estimators, engineers, maintenance techs, inspectors, apprentices studying for the exam, and homeowners checking their work. One-time purchase: no subscription, no account, no ads.
Available for iOS (iPhone & iPad) and Android.
User manual: iPhone & iPad (PDF) · Android (PDF) — functions and step-by-step keystroke examples, matched to the current release.
Features
Wire size and ampacity
- Required wire size in AWG or kcmil from amps: copper or aluminum, single-phase or three-phase, 60/75/90°C insulation, at 100% or 125%
- Ampacity in raceway or free air, from the NEC® ampacity tables (310.16 and 310.17, or the earlier equivalents)
- Ambient temperature correction above or below 30°C, in °C or °F
- Adjustment for more than three current-carrying conductors in a raceway
- NEC® 240.4(D) small-conductor limits and the Code minimum conductor size
- Parallel and derated conductor sizing
- Circular mils and kcmil for any wire size
Voltage drop
- Volts and percent dropped from one-way length, amps, phase and wire size, with Chapter 9 Table 8 resistance corrected to 60, 75 or 90°C
- Wire size for a long run, flagged VD WIRE SIZE when the drop, not the ampacity table, set it
- Longest one-way run a wire size will carry inside your limit: 3% by default, or any limit you set
- 1- or 3-phase, copper or aluminum, feet or meters; wire resistance per 1000 ft on its own key
Conduit sizing and fill
- 12 conduit types: EMT, ENT, FMC, IMC, LFNA, LFNB, LFMC, RMC, PVC schedule 40 and 80, Type A and Type EB
- Trade size for a mix of THW/THHW, XHH/XHHW or THHN/THWN conductors
- Fill percentage, cross-sectional area and area remaining, from the Chapter 9 tables, with the correct 1-, 2- and over-2-wire fill limits and the Note 7 round-up
- Maximum conductors of a given size a conduit will take
Motors
- Full-load current for 1-phase, 3-phase, synchronous and DC motors, from NEC® Tables 430.247, 430.248 and 430.250
- Horsepower from amps, and full-load amps from horsepower
- Maximum fuse and breaker size from Table 430.52 (430.52(C)(1) in 2023 and 2026): single- or dual-element fuse, inverse-time or instantaneous-trip breaker, with the next standard size 240.6(A) allows
- Motor overload protection sized from nameplate amps, per 430.32(A)(1)
- NEMA starter size, per NEMA ICS 2
Grounding
- Equipment grounding conductor size, per 250.122
- Grounding electrode conductor size, per 250.66
Power, math and conversions
- Convert between amps, watts, volts, VA, kVA, kW, power factor %, efficiency % and DC resistance
- Ohm's Law: enter any two of ohms, volts or amps to get the third
- Kirchhoff's Law and parallel resistance
- BTU ↔ kilowatt-hours
- Doubles as a standard calculator, with Store and Recall memory keys
Code references, help and updates
- Wire size, fuse, breaker, overload and grounding answers print the table or section they came from, numbered as your selected edition numbers it
- Help on every key: press and hold any key for its help page — a Getting Started guide, worked examples and the full manual are included
- Every calculation runs on the device: no account, no sign-in, no ads, and no signal needed in a basement or a mechanical room
- Quick, easy updates for future NEC® code revisions
See it in action
Three short recordings from the iPhone app — every keystroke and answer is replayed from the manual’s worked examples.
Frequently asked questions
How do I access help within the app?
Press [Shift], then the divide key. For help on a specific key or function, press and hold the key for 1–2 seconds (for a shift function, press [Shift] first, then press and hold the primary key).
Which NEC® editions are included, and what does the in-app purchase add?
NEC® 2023, 2020, 2017, 2014, 2011, 2008, 2005, 2002 and 1999 are included, with 2023 as the default. NEC® 2026 code data is a one-time in-app purchase: the NEC 2026 button sits in Preferences beside the NEC version setting, and once bought the 2026 edition appears in that list. Every table and citation follows the edition you select.
Where do the formulas and values come from?
Calculations are based on requirements taken straight from the NEC® code books, plus fundamental formulas such as Ohm's Law and Kirchhoff's Law — saving you the manual table lookups and hand calculations.
Where do I set the wire type for conduit calculations?
Press the [Wire Type] button and choose #THW/#THHW, #XHH/#XHHW or #THHN/#THWN. The choice sets the conductor area used for conduit fill.
Where do I set the wire insulation rating (60, 75, 90°C)?
Press [Shift] then [5] — the button is labeled "Wire Temp."
Does it need an internet connection?
No. Every calculation runs on the device. A connection is only needed for the NEC® 2026 purchase and the support links.
How do I contact technical support?
CyberProdigy offers free technical support. Email us at techsupport@cyberprodigy.com — every in-app help page also has a link to contact support.
Get Electrical Calc Elite™ today
Available for iOS (iPhone & iPad) and Android. Free technical support included.
*NEC® 2026 code data is a one-time in-app purchase. The other nine editions are included.
Electrical Calc Elite™ is not associated with ElectriCalc® Pro, and CyberProdigy LLC is not affiliated with Calculated Industries, Inc.