ElectriCalc: NEC Calculator

ElectriCalc is the professional electrical calculator for electricians, contractors, and engineers. 20 fast, accurate, NEC-compliant calculators on your iPhone - and they all work 100% offline.

No internet. No accounts. No tracking. Just the answers you need on the job site.

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6 FREE CALCULATORS
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- VOLTAGE DROP - Branch and feeder voltage drop. Verify NEC 3% / 5% limits in seconds.

- AMPACITY - Full NEC Table 310.16 in your pocket. Every wire size, insulation type, and temperature rating.

- GROUND WIRE - Equipment grounding conductor sizing per NEC 250.122.

- OHMS LAW - Solve V, I, R, or P from any two inputs. The classic, made fast.

- POWER TRIANGLE - kW, kVA, kVAR, and power factor conversions.

- 3-PHASE - Line-to-line and line-to-neutral conversions, balance checks.

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14 PRO CALCULATORS
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- WIRE SIZING - The right conductor for any circuit. Considers voltage drop, ampacity, and temperature derating together.

- CONDUIT FILL - Raceway fill percentage for EMT, IMC, RMC, PVC, FMC, ENT.

- CONDUIT BENDING - 9 bend types (offset, saddle, kick, segment) with bender presets.

- DWELLING LOAD CALC - Service sizing per NEC Article 220. Lighting, appliances, HVAC, EV - all in.

- NON-DWELLING DEMAND - Commercial loads per NEC 220.42 with full occupancy factors.

- SERVICE ENTRANCE - Disconnect sizing per NEC Article 230.

- BOX FILL - Junction and device box sizing per NEC Chapter 9.

- GROUNDING ELECTRODE - GEC sizing per NEC 250.66.

- DERATING - Temperature and conduit-fill ampacity factors with full table support.

- MOTOR CALC - Branch circuit protection per NEC Article 430.

- TRANSFORMER - Overcurrent protection per NEC Article 450.

- EV CHARGER - Level 2 branch sizing per NEC Article 625.

- FAULT CURRENT - Short-circuit calculations using the Cooper Bussmann point-to-point method.

- SELECTIVITY - Selective coordination per NEC 240.86 with citation-ready output.

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NEC 2023 + NEC 2026 + CEC 2024
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- Both NEC editions supported - switch in Settings
- CEC 2024 (Canadian Electrical Code, CSA C22.1) included
- Auto-detects standard by region

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PROFESSIONAL FEATURES
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- PDF EXPORT - Branded reports with your logo, license number, contact info. US Letter or A4. Send to clients and inspectors in seconds.

- CALCULATION HISTORY - Every result saved automatically. Tag with project name for billable tracking.

- COMPARISON MODE - Two calculations side-by-side. Run what-if scenarios with confidence.

- SIRI SHORTCUTS - Voice commands for every calculator. Hands-free on the ladder.

- HOME SCREEN WIDGET - Last result at a glance. One tap back into the calculator.

- HIGH CONTRAST MODE - Sunlight-readable. Built for outdoor and dim-basement work alike.

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WHY ELECTRICIANS CHOOSE ELECTRICALC
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20 calculators - more than any competitor
100% offline - works in basements, attics, mechanical rooms
NEC 2023 + NEC 2026 + CEC 2024 - true dual-standard
Verified data - every table cross-checked against the official code books
No ads, no tracking, no account
Siri Shortcuts on every calculator
Branded PDF reports - your logo, your license number
One-time purchase - own it forever


PRICING

ElectriCalc Pro: all 20 calculators, unlimited calculations, PDF export.
- Lifetime: $59.99 one-time purchase, no recurring charges
- Monthly: $9.99/month
- Try every Pro calculator with 1 free sample calculation
- Monthly auto-renews unless cancelled 24 hours before period ends

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