Elektryk Pro Box

Kalkulator Elektryk

About this app

Electrician Pro Box is a complete toolkit for electricians.

This app was created by an electrician for electricians, specifically for everyday construction work. It works 100% offline, requiring no internet connection, account, or registration. Your data stays on your phone.

⚡ AC CALCULATORS

- Cable and protection selection according to PN-HD 60364-5-52

Enter the power or current, length, and installation method (A1/A2/B1/B2/C) -

you'll receive the minimum cross-section, circuit breaker selection (B/C/D from 5 manufacturers),

and a voltage drop check.

- Existing cable check

Already have a 2.5 mm² cable for 30 m? Check the maximum current, power, and protection you can use.

- Power conversions: kW ↔ A ↔ kVA

Quick calculations for single-phase and 3-phase, automatically on the fly.

- "How to Power a Device?" Wizard

Step-by-step wizard with OCR of the nameplate. Take a photo,

and the app reads the power, current, cos φ, and efficiency,

and selects the cable and fuse.

🔋 DC CALCULATORS (NEW)

- Selection of DC cables for 12V, 24V, 48V, 110V, 220V, 600V, 1000V, and 1500V installations.

This takes into account that in DC, current flows through BOTH wires, using the 2 L formula, which

can be surprising with long 12V runs.

- Checking existing DC cable

Maximum current, power, and length at 3%, 5%, and 10% voltage drop.

- LED Strip Calculator
Presets for typical strips (5050, 2835, COB, RGB), power supply selection
with a margin, and checking whether power injection is necessary for long strips.

- DC Battery
Runtime for AGM/GEL, LiFePO4, Li-Ion, and AGM Deep Cycle (taking into account
DoD and efficiency). DC fuse and inverter cable selection.

- Photovoltaic DC page (NEC 690.8/690.9)
String design, Vmp, Voc, design current 1.25 × Isc, solar cable comparison
4/6/10 mm², gPV fuse selection.

💼 ORDERS - Full work management

- Client data, status, deadlines
- Task list with checklists and progress bar
- Materials with private price history (the app learns your prices)
- Hourly work with hourly rates
- Construction site photos
- PDF export - ready-made billing for the client
- Auto-save every 1.5 seconds - no "forget to save" errors

💰 FAST QUOTE

Estimate electrical work for the client in 3-5 minutes. Room presets
with one click (kitchen, bathroom, living room), special elements (PV,
monitoring, gate), "don't know" mode with a risk buffer. PDF export
in the client (pre-set prices) or company (labor + materials breakdown) options.

📐 TOOLS

- Single-line switchboard diagram, compliant with IEC 60617, PDF export
- Switchboard description generator, text circuit descriptions for projects
- Construction notes, folders, checklists, photos in notes
- Photo gallery, with 3-layer protection against loss

📊 MEASUREMENTS

- Measurement reports (loop impedance, insulation resistance, RCD) → PDF
- Illumination meter (lux) according to PN-EN 12464-1
- LED flicker detector, IEEE 1789-2015, CIE TN 006:2016, EU Ecodesign
2024. Measurement via camera (rolling shutter) or light sensor

(Android).

📚 KNOWLEDGE BASE

Built-in reference database: current-carrying capacity tables, A1-C mounting methods, AC and DC formulas, B/C/D circuit breaker characteristics, DC voltages and their applications, DC vs. AC fuses, NEC for photovoltaics, solar cables, DoD for batteries, power injection in LEDs,
and more.

🎯 CUSTOMIZE YOUR HOME SCREEN

Everyone has different needs. Long-press any tile or click the status in the upper right corner to enter edit mode. You can rearrange tiles, change their size (S/M/L), and hide unneeded ones. A single RESET button restores the default layout.

🔒 PRIVACY

- The app works 100% offline
- No data stored in the cloud
- No account, no registration, no login
- All data (orders, calculations, photos) stays on your phone

💙 SUPPORT

If the app helps you with your work, you can buy me a coffee, link
in Settings. Thanks to you, I can dedicate my time to developing and adding new features.

What’s new

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