Professional electrical cable sizing, voltage drop, conduit, cable tray and power factor correction — free, browser-based, no installation required.
Size cables by voltage drop and current carrying capacity. Includes distribution network tree, fault current analysis, and derating wizards.
Calculate minimum conduit size based on cable fill factor. Supports multiple cable configurations and fill ratios.
Determine cable tray width from cable loadout. Accounts for spacing (touching / 1D / 2D) and spare capacity.
Standalone voltage drop calculation for any cable. Includes cumulative VD tracking across distribution network.
Power Factor Correction capacitor sizing. Calculates required kVAr, capacitor current, and achieved power factor.
ECAS is a free, browser-based suite of electrical engineering calculators. Size cables by voltage drop and current carrying capacity, check derating and fault current, and work out conduit and cable tray sizes — all in one place, with no software to install. It runs entirely in your browser, so your project data stays on your device.
Each calculator mirrors the workflow of practising electrical engineers: build a distribution network from the main switchboard down to individual loads, apply installation derating factors, and produce clear cable schedules and printable reports. Copper and aluminium conductors are both supported.
Results are for guidance only and must be verified by a qualified person against the relevant standards (including AS/NZS 3008).