Electrical Calculators

Four job-site tools. No exam bank. No lab homepage.

Wire Size Calculator

Next AWG from ampacity and voltage drop.

Known size. Check volts and percent.

Will these AWGs fit this pipe?

Planning ampacity for a size and column.

Need the next conductor? Open Wire Size.

Already have a size? Open Voltage Drop.

Already have the wires? Open Conduit Fill.

Only looking up a table value? Open Ampacity.

Are these calculators free?

Yes. The four job-site tools stay free.

Where is the exam prep?

There is no exam product on this site.

Where is the circuit simulator?

It is not on the main path until it passes an internal quality gate.