# Voltkit: NEC Conduit Fill Calc > Conduit fill & bending, voltage drop, wire size — 21 offline NEC calculators Canonical page: [https://chrome-stats.com/d/com.chora.Voltkit](https://chrome-stats.com/d/com.chora.Voltkit) ## Overview - **ID:** `com.chora.Voltkit` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Chiaro Apps - **Category:** TOOLS - **Downloads:** 23 - **Version:** 1.1.0 - **Last updated:** 2026-07-13 - **First published:** 2026-07-13 - **Publisher country:** PL - **Size:** 30 MB - **Data as of:** 2026-09-26 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.chora.Voltkit) - **Website:** [https://chia.ro/](https://chia.ro/) - **Privacy policy:** [https://chia.ro/privacy](https://chia.ro/privacy) ## Description Voltkit is a precision NEC calculator built for working electricians — fast, accurate, and 100% offline. Every result cites the exact NEC 2023 table or formula behind it, so you can trust the number on the job and back it up to an inspector.

— 21 PRO CALCULATORS —
• Voltage Drop — approximate-K and exact Chapter 9 (Table 9 R/X) methods
• Conduit Fill — 10 raceways and every insulation, Chapter 9 Table 4
• Wire Size — the smallest conductor that meets both ampacity and voltage drop
• Wire Ampacity — Table 310.16 with ambient and bundling adjustments, plus free-air
• Box Fill — NEC 314.16 with a full standard-box picker
• Conduit Bending — 90° stub-up, offset, rolling, and saddle, with a scaled bend diagram
• Bend Length, Segment Bend, Bend Total, and Concentric — a full pipe-bending suite
• Ohm's Law and AC Power — watts, VA, and power factor, single- and three-phase
• Grounding — EGC (250.122), GEC (250.66), and 250.122(B) upsizing
• Dwelling Load — optional and standard methods (Article 220)
• Motor — full-load current, conductor, overload, and OCPD (Article 430)
• Plus Transformer, Pull Box, Parallel Sets, Motor Feeder, Power-Factor correction, and Appliance Demand

— BUILT FOR THE FIELD —
• Works entirely offline — every NEC table lives on your device, no signal required
• Show Calculation — open any result into clear, step-by-step math
• Save jobs and reopen them later from your calculation history
• Built-in NEC reference tables: ampacity, conduit fill, box fill, conductor properties, and more
• NEMA receptacle and conductor color-code references

— WHY ELECTRICIANS TRUST VOLTKIT —
Every calculation is derived from a published NEC 2023 table or formula and checked against authoritative worked examples (Mike Holt, Ugly's, NEC Annex C). No ads, no clutter, no internet required — just a clean, precise instrument that respects your trade.

— FREE, WITH OPTIONAL PRO —
Voltkit is free to use: every calculator gives you a complete, NEC-cited result and full worked steps. Voltkit Pro unlocks the advanced options for commercial and industrial work — three-phase, exact-impedance voltage drop, free-air ampacity, every raceway and insulation, larger conduit, box and parallel runs, over-1000 V transformers, and the full standard load calc — plus unlimited saved calculations. Prices may vary by region.

Built in the US for NEC 2023. Canadian CEC, BS 7671, and AS/NZS 3000 code packs are on the roadmap.

Voltkit is an independent tool and is not affiliated with or endorsed by the NFPA. ## Rankings - #2,597,757 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.INTERNET` - `android.permission.USE_BIOMETRIC` - `android.permission.USE_FINGERPRINT` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.chora.Voltkit.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.providers.gsf.permission.READ_GSERVICES` ## Similar extensions and apps - [ElectricianCalc NEC Calculator](https://chrome-stats.com/d/company.doublevision.electriciancalcpro) — 29 users - [ConduitLab: NEC Calculator](https://chrome-stats.com/d/com.teleiosai.conduitlab) — 107 users - [Fieldwatt Electrician NEC Calc](https://chrome-stats.com/d/com.fieldwatt.app) — 33 users - [BaseCalc Electric Calculator](https://chrome-stats.com/d/com.basemapped.basecalcelectric) — 7 users - [VoltKit: NEC 2026 Tools](https://chrome-stats.com/d/com.testtalkhq.voltkit) — 18 users - [VOLTS: Electrical Reference](https://chrome-stats.com/d/com.corzohub.volts) — 35 users - [ProVolt: Electrical Calculator](https://chrome-stats.com/d/com.integratedapps.provolt) — 14 users - [Conduit Fill NEC Chapter 9](https://chrome-stats.com/d/com.electools.conduit_fill_calculator) — 277 users, 3.50 / 5 - [Electrician Calculator Pro 26](https://chrome-stats.com/d/com.flysky.electriciancalc) — 20 users - [Box Fill NEC 314 Calculator](https://chrome-stats.com/d/com.electools.box_fill_calculator) — 484 users - [EV Calc Pro](https://chrome-stats.com/d/com.evcalcpro.app) — 1 users - [Tablas NEC 2023-2026](https://chrome-stats.com/d/com.electricidadparatodos.tablasnec) — 529 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.chora.Voltkit)