Engineering & Electrical Calculators
Free professional online tools designed for electrical engineers, panel builders, and technicians by Alfath Automation.
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Power Factor Calculator
Calculate the required capacitor bank size (kVAr) and estimate current reduction for 1-Phase & 3-Phase systems.
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Cable Sizing & Voltage Drop
Check voltage drop percentage and determine optimal Copper/Aluminum cable cross-section areas.
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Motor Starter Sizing
Determine Full Load Current (FLC), Circuit Breaker, Contactor (AC-3), and Overload range for motor starters.
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Busbar Current Rating
Calculate the current-carrying capacity for single and multiple parallel Copper busbars inside panels.
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Transformer FLC
Calculate Full Load Current for Primary (High Side) and Secondary (Low Side) transformer windings.
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Panel Cooling & Fan Sizing
Estimate required air ventilation airflow (m³/h & CFM) to dissipate internal panel heat losses.