Conduit Offset Bend
30° Conduit Offset
Everything for a 30 degree offset: the multiplier, the shrink, a worked example, and the calculator, all from the same math your bender uses.
The 30° Offset Numbers
| Multiplier (field / exact) | 2 / 2 |
| Shrink per inch of offset | 1/4″ (0.2500″) |
| 6″ offset: distance between bends | 12″ |
| 6″ offset: shrink to subtract | 1.5″ |
Distance between bends = offset depth × 2. Shrink = offset depth × 1/4″. Both bends are 30 degrees, rotated 180° apart.
Calculate Your 30° Offset
Set the angle to 30° and enter your offset depth for the exact mark spacing and shrink.
Frequently Asked Questions
What is the multiplier for a 30 degree offset?
The multiplier for a 30 degree offset is 2 (the exact value is 1/sin(30 degrees) = 2). Multiply your offset depth by 2 to get the distance between the two bend marks. For a 6 inch offset that is 6 x 2 = 12 inches between marks.
How much does a 30 degree offset shrink?
A 30 degree offset shrinks 1/4 inch for every inch of offset depth. So a 6 inch offset shrinks the run about 1.5 inches, and a 4 inch offset shrinks about 1 inches. Subtract the shrink from your measurement so the conduit ends and fittings still land where you need them.
How do you bend a 30 degree offset?
Mark the first bend where the offset should start, then measure 12 inches (for a 6 inch offset) toward the free end and mark the second bend. Bend both marks to 30 degrees, keeping the bends in the same plane and rotating the conduit 180 degrees between them so the offset lies flat. Check the depth against your target and subtract the 1.5 inch shrink when you cut or measure the run.
When should I use a 30 degree offset?
A 30 degree offset is the everyday all-around choice, with an easy multiplier of 2 and moderate shrink. It balances a clean, easy wire pull against a reasonable distance between bends, which is why it is the most common offset angle for general work.