WattsCalc

Offsets, 90-degree stub-ups, and saddles come out as precise bend marks rounded to the nearest 1/16 inch inside WattsCalc. Electricians working on the job choose EMT trade sizes between 1/2 inch and 1 inch, type the offset height or stub length, and pick bend angles like 10, 15, 22.5, 30, 45, or 60 degrees. The card calculates the exact distance between marks, shrink constants, and typical take-up values without needing an internet connection or a user account.

Klein multipliers and shrink formulas

Distance between marks equals the offset height multiplied by the angle constant, such as a 2.00 multiplier for a 30-degree bend. Shrink adds length to the run based on the angle, ranging from 1/16 inch per inch of height at 10 degrees to 1/2 inch per inch at 60 degrees. Preset take-up values sit at 5 inches for 1/2-inch EMT, 6 inches for 3/4-inch EMT, and 8 inches for 1-inch EMT, though users can adjust them for worn bender shoes.

Step-by-step calculation workflow

1. Pick the bend type between offset, 90-degree stub-up, or saddle.
2. Enter the trade size and height, accepting fractions such as 6 1/2 inches.
3. Set the angle or leave optional starting marks blank to get spacing only.
4. Read the resulting numbers, switch to millimeters if using metric stick, and tap a number to copy.
5. Print the isolated result card or verify measurements on scrap conduit before cutting production pipe.