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ElectriCalc: NEC Calculator
by Yusuf Can Samiloglu
Description
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.
---------------------------
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.
---------------------------
NEC 2023 + NEC 2026 + CEC 2024
---------------------------
- Both NEC editions supported - switch in Settings
- CEC 2024 (Canadian Electrical Code, CSA C22.1) included
- Auto-detects standard by region
---------------------------
PROFESSIONAL FEATURES
---------------------------
- 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.
---------------------------
WHY ELECTRICIANS CHOOSE ELECTRICALC
---------------------------
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
Terms: https://elly2504.github.io/electrocalc-pages/terms-of-use.html
Privacy: https://elly2504.github.io/electrocalc-pages/privacy-policy.html
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
No internet. No accounts. No tracking. Just the answers you need on the job site.
---------------------------
6 FREE CALCULATORS
---------------------------
- 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.
---------------------------
14 PRO CALCULATORS
---------------------------
- 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.
---------------------------
NEC 2023 + NEC 2026 + CEC 2024
---------------------------
- Both NEC editions supported - switch in Settings
- CEC 2024 (Canadian Electrical Code, CSA C22.1) included
- Auto-detects standard by region
---------------------------
PROFESSIONAL FEATURES
---------------------------
- 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.
---------------------------
WHY ELECTRICIANS CHOOSE ELECTRICALC
---------------------------
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
Terms: https://elly2504.github.io/electrocalc-pages/terms-of-use.html
Privacy: https://elly2504.github.io/electrocalc-pages/privacy-policy.html
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
What's new (v1.4.0)
v1.4 - TEN NEW CALCULATORS
This is our biggest release yet. We doubled the lineup from 10 to 20.
NEW PRO CALCULATORS
EV CHARGER. Level 2 branch sizing per NEC Article 625.
FAULT CURRENT. Short-circuit using Cooper Bussmann point-to-point method.
SELECTIVITY. Selective coordination per NEC 240.86, citation-ready output.
CONDUIT BENDING. 9 bend types plus bender presets (offset, saddle, kick, segment).
SERVICE ENTRANCE. Disconnect sizing per NEC Article 230.
NON-DWELLING DEMAND. Commercial load per NEC 220.42 with occupancy factors.
GROUNDING ELECTRODE. GEC sizing per NEC 250.66.
NEW FREE CALCULATORS
OHMS LAW. V, I, R, P solver from any two inputs.
POWER TRIANGLE. kW, kVA, kVAR, and power factor.
3-PHASE. Line-to-line and line-to-neutral conversions and balance checks.
OTHER UPGRADES
NEC 2026 support added (alongside NEC 2023).
Voltage drop now matches Cooper Bussmann reference values.
Faster PDF export, smaller file size.
Improved derating-table accuracy for parallel runs.
Refreshed App Store screenshots for clearer feature presentation.
Better translations across the app.
High-contrast mode polish.
Bug fixes and performance improvements.
Thanks to the electricians who emailed and reviewed - your feedback shaped this release. Keep it coming. We read every single one.
- The ElectriCalc Team
This is our biggest release yet. We doubled the lineup from 10 to 20.
NEW PRO CALCULATORS
EV CHARGER. Level 2 branch sizing per NEC Article 625.
FAULT CURRENT. Short-circuit using Cooper Bussmann point-to-point method.
SELECTIVITY. Selective coordination per NEC 240.86, citation-ready output.
CONDUIT BENDING. 9 bend types plus bender presets (offset, saddle, kick, segment).
SERVICE ENTRANCE. Disconnect sizing per NEC Article 230.
NON-DWELLING DEMAND. Commercial load per NEC 220.42 with occupancy factors.
GROUNDING ELECTRODE. GEC sizing per NEC 250.66.
NEW FREE CALCULATORS
OHMS LAW. V, I, R, P solver from any two inputs.
POWER TRIANGLE. kW, kVA, kVAR, and power factor.
3-PHASE. Line-to-line and line-to-neutral conversions and balance checks.
OTHER UPGRADES
NEC 2026 support added (alongside NEC 2023).
Voltage drop now matches Cooper Bussmann reference values.
Faster PDF export, smaller file size.
Improved derating-table accuracy for parallel runs.
Refreshed App Store screenshots for clearer feature presentation.
Better translations across the app.
High-contrast mode polish.
Bug fixes and performance improvements.
Thanks to the electricians who emailed and reviewed - your feedback shaped this release. Keep it coming. We read every single one.
- The ElectriCalc Team
