About

WattsCalc is a small web tool for people who bend conduit for a living. The homepage is a conduit bending calculator: offsets, 90° stub-ups, and three- or four-point saddles. It is built to open on a phone with gloves nearby, not to collect emails.

The constants are the ones on Klein Tools bending charts — multipliers 5.76 / 3.86 / 2.61 / 2.00 / 1.41 / 1.15 and shrink 1/16 through 1/2 inch per inch of offset height. Take-up defaults are 5, 6, and 8 inches on 1/2, 3/4, and 1-inch EMT, and you can type a different number when your shoe disagrees. We do not invent trig to look precise.

There is no login, no paywall, and no install from an app store. Add the site to your home screen and the service worker keeps the calculator, cheat sheet, and shrink chart available when the trailer has no signal. Results round to 1/16 inch because that is what a pencil will hold. You can switch to millimetres and print only the result card.

WattsCalc is not Klein Tools, Ideal, Greenlee, or the Steel Tube Institute. Bender shoes wear. Spring-back on rigid is real. Local amendments to the NEC still win. Use the numbers as a field estimate, then verify on scrap and against the code book in the truck.

The site is operated as a free utility with advertising so the calculator can stay free. We do not sell Amazon links on the tool page. If you need the charts without the calculator, start at the cheat sheet or the shrink chart. Questions go to hello@any1tan.com.

Pro features may appear later. They will not lock the core offset, stub, and saddle math behind an account. The job is to mark pipe, not to build a membership club.