Practical tools for electrical professionals.

Electrical Calc is an independent collection of straightforward browser-based calculators for electricians, automation engineers and small electrical contractors. Our goal is to make common planning calculations faster to check, easier to understand and accessible on any device.

Our tools use visible, fixed engineering formulas and reference values. They are intended for preliminary design, estimation and educational use. They do not replace applicable electrical codes, manufacturer instructions, a site survey or professional engineering judgement.

We are continually expanding the toolkit with useful, focused calculators. Please use the results responsibly and have final installation decisions checked by a qualified professional.