WattsCalc

About WattsCalc

WattsCalc is a free conduit bending calculator for electricians and apprentices who need marks on EMT before they make a bend. It covers offsets, 90 degree stub-ups and three- or four-point saddles for 1/2-inch, 3/4-inch and 1-inch EMT, with results rounded to the nearest 1/16 inch.

The tool works in inches or millimetres and can be used as an offline progressive web app on a phone, so it is practical in the gang box without an account. It shows distance between marks, shrink and take-up, and includes a reference table of multipliers and shrink constants per bend angle.

What sets it apart is that bending, fill and electrical reference calculators sit on the same site, and the page is explicit that results are estimates. Users are reminded to verify measurements on scrap and against their bender and local code before cutting.