Conduit Bending — Ideal Offset Geometry
Ideal two-bend centerline geometry in inches. US educational worksheet, not NEC installation approval or a manufacturer bender chart.
Ideal two-bend centerline geometry in inches. US educational worksheet, not NEC installation approval or a manufacturer bender chart.
No current calculation
Enter and review the parameters, then calculate. The fixed example below is not your current result.
Method and boundaries
For equal and opposite bends of angle θ and offset height H: ideal bend spacing H/sin θ; advance H/tan θ; geometric shrink H×tan(θ/2). Second ideal reference mark = first entered reference mark + spacing. Finite-radius bends, shoe take-up, springback, material, trade size, minimum bend radius and accumulated bends are deliberately not inferred. Use the actual manufacturer chart for physical marks; no unsupported radius or negative take-up mark is reported.
Fixed worked example — not a live result
Fixed default example: H=6 in, θ=30°, first reference=12 in. Ideal spacing=12 in, advance=10.3923 in, shrink=1.6077 in, second ideal reference=24 in. These are centerline geometry, not a promise that shoe marks match.
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Worksheet version 2026-10-15. Verify source applicability and all omitted requirements before any real-world decision.