Inputs/outputs reflect chosen units. Internal math uses inches.
Bend Planner
| # | Operation | Inputs | Mark / Spacing | Shrink / Gain | Conduit Used | Notes | |
|---|---|---|---|---|---|---|---|
| Total Conduit Estimate | 0 in | ||||||
Exports include rows currently visible in the planner.
Example Data Table
Typical hand‑bender values. Always confirm with your tool chart.
| EMT Size | 90° Take‑Up (in) | Approx. Gain 90° (in) | Centerline Radius (in) |
|---|
Offset Multipliers
- 10° → 5.76
- 22.5° → 2.613
- 30° → 2.00
- 45° → 1.414
- 60° → 1.155
Shrink per inch of rise
- 10° → 1/16" (0.0625)
- 22.5° → 3/16" (0.1875)
- 30° → 1/4" (0.25)
- 45° → 3/8" (0.375)
- 60° → 1/2" (0.5)
Formulas Used
- 90° Stub‑Up: Cut mark from end = stub height + take‑up.
- Offset spacing: Distance between bends = multiplier × rise.
- Offset shrink: Subtract from original straight = shrink constant × rise.
- Back‑to‑Back 90°: Second mark spacing ≈ distance between faces − gain.
- Arc estimate (optional): Bend arc length ≈ (π × CLR × angle) / 180.
Notes: Values are typical for hand benders. Actual take‑up, gain, and centerline radius vary by manufacturer and shoe. Always validate against your tool.
How to Use
- Select EMT size and desired units.
- Add operations: Straight runs, 90° stub‑ups, Offsets, or Back‑to‑Back 90°.
- Enter rise, distance, and angles as requested per row.
- Click Calculate to update marks, spacing, shrink, and totals.
- Use Download CSV or Download PDF for sharing or records.
FAQs
They are typical hand‑bender charts for EMT, widely used as field references. Your bender shoe may differ; check the printed chart on your tool.
Totals add straight runs, stub‑ups, and offset spans between marks. Back‑to‑back rows provide spacing guidance; include straight distance separately for totals.
Yes. Choose your preferred unit and the calculator converts inputs and displays accordingly. Internally the math uses inches for standard electrical tables.
They’re practical trade constants for quick layouts. For critical runs, mock‑up with scrap to confirm before bending finished pieces.
This tool targets EMT hand‑bender conventions. Rigid/IMC have different radii and take‑ups; consult manufacturer charts or use a tool tailored for those systems.
Disclaimer: Field conditions vary. Always follow applicable codes, inspection requirements, and manufacturer recommendations.