Observed arrival · 2026-09-18

AmpSize: Electrical Calculators for NZ and Australia

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Editorial interest 78/100 Selection signal · not a rating of the site

A free suite of cable-sizing and electrical calculators built around New Zealand and Australian standards.

Landing page captured for the 2026-09-18 issue.

For: Electricians and electrical designers in NZ and Australia
Worth noticing: The suite covers six cable checks, including voltage drop, loop impedance, fault rating, conduit fill, and voltage rise.

Field notes

AmpSize groups its calculators into five practical areas and offers both individual tools and a cable-sizing wizard. The visible catalogue includes six cable checks, maximum demand, motor and battery calculations, generator sizing, and an arc-flash estimate. Standards are named per tool, including AS/NZS 3008.1.2, AS/NZS 3000, AS/NZS 4777.1, IEC 60255, IEEE C37.112, and IEEE 1584-2002.

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