90° Conduit Stub-Up Calculator
Calculate the arrow mark and bending sequence for a finished 90-degree conduit stub. New here? Read the quick guide.
Project details (optional)Add details
90-degree bend inputs
Configure the stub-up
Calculated field mark
Measure from the STUB END
Formula breakdown
Arrow mark: finished stub - confirmed take-up
Substitution: 14 in - 6 in = 8.000 in
How to mark and bend this configuration
Field instructions
90° conduit stub-up
This is the conduit end that becomes the top of the finished vertical stub. Measure the arrow mark from this same end.
- Desired finished stub
- 14.00 in (14 in)
- Confirmed bender take-up
- 6.00 in (6 in)
- Arrow mark from STUB END
- 8.00 in (8 in)
- Target bend
- 90°
- 1Identify and label the STUB END.
This end becomes the top of the finished vertical stub. All measurements begin here.
- 2Confirm the bender take-up: 6.00 in (6 in).
Read the take-up for the exact bender, conduit material, and trade size. Do not assume another bender uses the same value.
- 3Make the arrow mark at 8.00 in (8 in).
Measure from the STUB END and draw a clear line completely across the conduit. The calculation is finished stub minus confirmed take-up.
- 4Place the conduit in the bender.
Keep the STUB END on the hook side of the bender and align the bender arrow exactly with the calculated mark. Keep the conduit and bender in the intended bend plane.
- 5Bend toward 90°.
Stabilize the bender, apply steady pressure in the handle direction shown, and bring the stub end to the finished 90° position. Use the actual tool's degree reference and allow for normal springback.
Reference: arrow • One bend direction • Target: 90° - 6Verify the finished stub.
Place the bent conduit against a square or level reference. Confirm the leg is 90°, then measure the finished stub using the same endpoints required by the installation. Correct or remake the bend if the dimension is wrong.
Calculated marking preview
90° stub-up
This preserves the calculated field diagram. The curve is illustrative; the actual shoe radius and bend geometry depend on the bender and conduit.
Export this stub-up calculation
Create a field worksheet containing project details, conduit, finished height, confirmed take-up, arrow-mark formula, bending sequence, diagram, and tool-specific verification warning.
90-degree stub guidance
Use the take-up printed for the actual bender
The calculation is simple; selecting the correct take-up is the critical part. Manufacturer, conduit type, trade size, and bender model must match.
What is bender take-up?
Take-up is the amount subtracted from the desired finished stub height to locate the bender arrow mark. Use the value printed on or specified for the exact bender.
How do I calculate a 90-degree stub mark?
Subtract the bender take-up from the desired finished stub height, measure that distance from the conduit end, and align the bender arrow to the mark.
Why does the calculator default to custom take-up?
Take-up varies by bender and conduit size. Custom input keeps the workflow manufacturer-neutral; verified Klein hand-bender values are optional presets.
See the verified source and limitations on the methodology page.