What we do
We make the tools construction people reach for between the drawing and the install: schedule converters, code-basis calculators, and batch tools that take a whole feeder schedule at once. Every tool runs in your browser — the file you drop and the numbers you type stay on your device. The one exception is yours to press: a signed-in member who chooses Save on a Members tool stores that input (never the result) under their own account, until they delete it. Every tool shows its work, with the code section it stands on.
The way we work
Every table an engine encodes is transcribed from a published source and named on the page — the standard, the edition, and the engine build that produced your answer, so a saved calculation can be reproduced. Every engine carries an automated test harness that runs on every change. Every result says plainly what it is: a typical approach for field use that a licensed engineer confirms. Where a table does not cover your case, the tool refuses rather than guessing. We would rather say less and be right. It is not what you do, but the way in which you do it.
Which editions we are on
The electrical engines are transcribed from the 2023 NEC and NFPA 70E-2024. Both have newer editions: the 2026 NEC moved branch-circuit, feeder, and service load calculations out of Article 220 into the new Article 120 and changed values along the way, and NFPA 70E-2027 is published. Those are not encoded yet, and we will not silently overwrite one edition with another — when they ship they ship as a selectable rule set, so a calculation you saved under 2023 still answers as 2023. Every calculator prints its standard, edition, and engine build with the result. The edition your AHJ has adopted governs; check it before you rely on a section number.
Who we are
Founded by people who came up in the trade — years on the tools, then years on the model. We know what a drawing leaves out, what a spec buries, and why a number you cannot check is worth nothing on a Friday afternoon. The tools here are the ones we wanted on our own jobs.
The crowned stag
The stag trippant is the emblem of the family names on the door. Crowned, walking, looking ahead — it stands for craft carried forward with care. You will find it on the site, the converter, and the cover sheet of every workbook we build.