BendCraft Pro
Stub-Up (90°) Bend Calculator
Enter your target stub height and your bender's take-up to get the exact bend mark — the one number every 90° stub-up depends on.
Why take-up matters — and why there's no universal table
A 90° bend doesn't just fold the conduit at a point — it consumes a length of it in the curve. That consumed length is the take-up, and it depends on your specific bender's shoe radius and the conduit size, not on any single "standard" value. Two benders from different manufacturers, even at the same trade size, can have noticeably different take-up.
Rather than showing you a manufacturer take-up table that may not
match your actual tool, this calculator asks you to measure it once
(bend a test piece, measure the actual result, compute
take-up = mark distance − stub height in reverse) and
reuse that number for every stub-up with that bender and conduit
size. It only takes a minute and removes an entire category of
on-site guesswork.
Frequently asked questions
What is take-up in conduit bending?
Take-up is the length of conduit a 90° bend consumes making the curve. If you mark a conduit at the take-up distance from the end and bend it 90°, the top of the bend lands exactly at the conduit's original end point — any stub height beyond that is simply height minus take-up.
How do I measure my bender's take-up?
Mark a test piece at any known distance from the end, bend it 90°, then measure the actual height from the floor to the top of the stub. Take-up = your mark distance − the measured height. Do this once per bender/conduit-size combination and it holds for every future stub-up with that pair.
Can I use a manufacturer's published take-up value instead?
You can, but field-measuring your specific tool is more reliable — bender wear, shoe design differences, and conduit wall thickness all shift the real value slightly from any catalog number.
Need more than stub-ups?
BendCraft Pro for iOS covers all 10 bend types — offset, stub-up, kick, saddles, rolling offset, concentric, segment, and compound — plus voltage drop, conduit fill, and PDF reports you can hand off on-site. It also remembers your bender's take-up so you never re-measure it.