What is a rolling offset?
A rolling offset combines a horizontal and a vertical offset into a single 'true offset' distance (via the pythagorean relationship), then applies the same bend-angle multiplier used for a standard offset bend.
Rolling Offset Calculator
Conduit rolling-offset developed length from horizontal and vertical offsets.
True offset — in; mark the two bends — in apart.
Rolling offset inputs
True offset is computed from horizontal and vertical offsets, then the bend-angle multiplier table gives the travel between the two bends.
True offset — in; mark the two bends — in apart.
Mark bends at
Rolling offset estimate
Warnings
- ERROR Enter a horizontal offset greater than zero.
- ERROR Enter a vertical offset greater than zero.
- ERROR Select a standard bend angle.
Detail values
Assumptions
- Bend angle: Not selected
- Multiplier: Not available until a bend angle is selected
Included: true offset, travel (distance between bends).
Not included: labor, verification against manufacturer or local-code specifics beyond the reference table used, material waste from cutting.
Formula details
- True offset: sqrt(horizontalOffset^2 + verticalOffset^2)
The diagonal the run has to cover across both planes. It is not the travel -- travel is this number times the bend multiplier.
- Travel: trueOffset x multiplier(bendAngle)
multiplier = 1 / sin(bendAngle), carried at the two-decimal values printed on a bender's multiplier chart so this mark and the bender's agree. Travel is the centre-to-centre distance between the two bends, not the arc length of either bend.
Material List
About this calculator
Enter horizontal and vertical offsets and select a standard bend angle to get true offset and developed length.