Android · IEC 60364 · .NET MAUI

Professional tools for
electrical engineers

EE Toolkit brings IEC-standard calculators, an AI resistor scanner, and a comprehensive wire gauge reference to your Android device. Built by an engineer, for engineers.

🔔
Currently in testing
Public release coming soon. Contact us to join the beta →
✉  Request beta access
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EE Toolkit
Electrical engineering calculators
Calculators
⚡ Ohm's Law
V, I, R, P solver
🎨 Resistor
4 and 5 band
🔄 Units
9 categories
🔌 Wire
IEC 60364
Pro tools
÷ Voltage Div.
R1/R2 + load
∿ RC / RL
Time constants
8
Built-in tools
9
Unit categories
18
Wire gauge entries
IEC
European standard
€3.99
One-time Pro unlock

What's inside

Every tool you need on the bench

Four free tools for everyday use, four pro tools for advanced calculations. One purchase unlocks everything — forever.

⚡
Ohm's Law
Enter any two values among V, I, R, P and all four are solved instantly.
Free
🎨
Resistor Color Code
Decode 4 and 5-band resistors with a live visual preview and E12/E24 series detection.
Free
🔄
Unit Converter
9 categories — Voltage, Current, Resistance, Power, Energy, Frequency, Capacitance, Inductance, dB.
Free
🔌
Wire Gauge Reference
IEC 60364 current ratings from 0.5mm² to 240mm². Three installation methods with EU cable types.
Free
÷
Voltage Divider
Solve for any missing value. Optional load resistance with loading effect percentage.
Pro
∿
RC / RL Circuits
Time constants, charge/discharge curves, and corner frequency. Live OxyPlot graph across 6τ.
Pro
∥
Series / Parallel RLC
Up to 6 components in series or parallel. Optional reactance calculation at any frequency.
Pro
⇌
Transformer Calculator
Four solve modes: voltage, current, turns ratio, and full load power analysis with efficiency.
Pro

Built to spec

European standards throughout

Not another AWG-first app. EE Toolkit is built around IEC and European standards used in Greece, the EU, and most of the world.

IEC 60364
Wire current ratings
Methods A, B, C — conduit in wall, on wall, and clipped direct
IEC 60062
Resistor color codes
International standard for component marking and coding
mm² first
Metric wire sizing
0.5mm² to 240mm² with NYM-J, NYY-J, H05VV-F designations
SI units
International system
All calculators use SI units with proper prefix notation

AI-powered · Pro feature

Point. Scan. Done.

The AI Resistor Scanner uses your device camera and Claude vision AI to identify color bands automatically — even on tiny SMD-adjacent components in poor lighting.

  • → Works from camera or photo gallery
  • → Populates all band pickers automatically
  • → Confidence indicator — high / medium / low
  • → Supports both 4-band and 5-band resistors
// Resistor Scanner — AI Pipeline
 
→ Camera capture initiated
→ Image resized to 1024px
→ Sending to Cloudflare Worker
→ Claude Haiku vision analysis
 
✓ band1: "Brown"
✓ band2: "Black"
✓ band3: "Green"
✓ band4: "Gold"
✓ resistance: "1 MΩ"
✓ confidence: "high"
 
→ Band pickers populated

Simple pricing

Free forever. Pro once.

No subscriptions. No ads. No data collection. Pay once and every future pro tool is yours automatically.

🔔 Currently in beta testing — public release coming soon.

Free
€0
Always free, no account needed
  • Ohm's Law calculator
  • Resistor color code decoder
  • Unit converter — 9 categories
  • Wire gauge IEC reference
  • Dark mode support
  • Works fully offline
Pro
€3.99
One-time purchase — yours forever
  • Everything in Free
  • Voltage Divider + load
  • RC / RL with live graph
  • Series / Parallel RLC
  • Transformer calculator
  • AI Resistor Scanner
  • All future pro tools