Good work starts with
the right numbers.

Ampxa brings practical electrical calculations and professional documents into one lightweight toolkit. This version expands the original USA-focused site; every calculator follows US (NEC) practice, and invoices and estimates adapt currency, tax labels and paper size.

Calculations open to inspection

Inputs, equations, assumptions and output units stay visible. Complex design topics are marked as reference guides and require verified code or manufacturer data.

A better finish to every job

Invoices, estimates, quotes and bids carry the contractor’s own brand. Each exports as a selectable-text PDF or stays as a local draft for the next visit.

See methodology and review status before using engineering results in an installation.