E-calc Toolkit is an essential electrical calculator and engineering companion designed for electricians, electrical engineers, site technicians, contractors, students, and DIYers. Perform accurate calculations with clear, step-by-step formula breakdowns right in your pocket.

Whether you are sizing cables on-site, calculating motor parameters, or troubleshooting systems, E-calc Toolkit simplifies your everyday electrical calculations.

🤖 AI Offline Engineer Assistant
Get instant technical guidance anytime, anywhere—without requiring an internet connection:
• On-Demand Technical Assistance: Ask electrical questions, get troubleshooting tips, and clarify formulas on the go.
• Completely Offline: Works reliably in basements, remote substations, industrial plants, and off-grid project sites with zero data usage.

🔌 Electrical Wiring & Cable Calculations
• Wire Gauge & Cable Sizing: Calculate appropriate wire sizes for AC and DC circuits.
• Voltage Drop Calculation: Determine voltage drop values, percentages, and maximum allowable cable lengths.
• Dedicated DC Wire Sizing: Specialized calculator for DC installations and AWG / SWA cables.
• Circuit Protection: Circuit breaker sizing and cable ampacity calculations.
• Power Losses & Unbalance: Compute voltage unbalance percentage, cable power dissipation, and neutral currents.
• Cable Short Circuit Current: Determine minimum cable short circuit parameters.
• Safe Installations: Calculate wire resistance and conduit fill factors.

⚙️ Motor Calculations
• Star-Delta Starter: Sizing and configuration for star-delta motor starting.
• Full Load Current (FLC): Accurate calculation of motor full load current.
• Motor Power: Sizing and power requirements for electric motors.
• Motor Speed: Operating speed (RPM) and slip calculations.

📄 Professional PDF Reports
• Instant PDF Generation: Export clean, organized calculation sheets containing all relevant input parameters, formulas, and results.
• Site Documentation: Save, print, or share reports directly with clients, supervisors, or site inspection teams.

🔄 Engineering Unit Converter
Quickly convert standard electrical and engineering units across essential dimensions:
• Power: W, kW, MW
• Energy: Wh, kWh, MWh
• Current: Amperes (A), mA, kA
• Voltage: Volts (V), mV, kV
• Resistance: mΩ, Ω, kΩ, MΩ
• Frequency: Hz, kHz, MHz

⭐ Key Highlights
✔ Step-by-Step Walkthroughs: View exact formulas and mathematical steps behind every calculation.
✔ Smart Presets: Store custom default voltages, power factors, and allowable voltage drops to speed up repetitive tasks.
✔ Clean & Intuitive Design: High-contrast, easy-to-navigate layout optimized for field work and rapid input.
✔ Fast & Lightweight: Instant results with smooth, responsive performance.

Download E-calc Toolkit today and take accurate electrical calculations wherever your work takes you!