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Shops & Outbuildings Free

Square or Rectangle to Round Transition Template

Four panels to print, measure and assemble.

Field guide: Print and check a square-to-round paper pattern
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Enter base width and depth, nominal round diameter and perpendicular height. Develop a centered 48-division faceted model into four labeled paper panels with explicit right-edge lap strips. The free PDF is tiled for Letter or A4 with registration marks and two-axis scale checks.

Pro Tip: Measure both printed rulers, align the tile crosses and assemble paper before transferring a pattern. Keep the bare design edges when trimming projecting tab ends.

How It Works

  1. Measure one datum

    Enter width, depth, diameter and height in decimal millimeters or decimal/fractional inches. Height is perpendicular between the planes, not a slant length. The round diameter must fit within both base edges.

  2. Choose the paper lap

    Enter an explicit width, including zero. Each panel receives one right-edge paper strip. Review the nominal circle, chord inset, actual panel bounds and untrimmed paper area. No locked seam or hem allowance is inferred.

  3. Print all four pieces

    Export the free branded PDF. It includes Letter or A4 pattern tiles with the same input record ID, 10 mm overlap and both-axis 50 mm rulers. Use Actual Size/100%; do not Fit/Shrink or Poster-tile again.

  4. Check and assemble paper

    Measure the rulers in both directions. Align three crosses across each joined tile boundary, cut solid lines and fold dashed lines. Join F to R to B to L to F. Trim tab portions projecting beyond the next panel while keeping the bare geometry.

Built For

  • Review a centered paper mock-up: make the proposed width, depth, diameter and perpendicular height explicit before a fabrication review.
  • Compare panel shapes: rectangle width and depth panels differ; opposite panels match for the centered model.
  • Retain a geometry record: share the canonical state or save a CSV with vertices, true lengths, triangle edges and folds.
  • Compare lap choices: review an entered untrimmed strip against a zero-lap paper pattern, without converting it into a metal seam recipe.
  • Choose paper format: compare the Letter and A4 tile count for the same geometry. Over 100 pattern tiles retains preview and CSV but refuses the PDF.

Features & Capabilities

Declared geometry

Centered four-panel development, 13 triangles per panel, true-length checks and a reported 48-chord approximation.

Explicit paper allowances

One right tab per panel, zero option, bounds and untrimmed area; documented manual end trimming.

Identified printing

Letter/A4 1:1 vector tiles, overlap crosses, record ID and two-axis rulers; summaries remain labeled not to scale.

Disclaimer: This is a triangulated paper layout. Confirm both print axes, assemble the paper panels and review material, joint and end details before cutting metal. No physical print, assembled fit or operator acceptance has been demonstrated.

Guides for this job

Shops & Outbuildings

Print and check a square-to-round paper pattern

Read true lengths, panel labels, paper lap trimming, faceting, two-axis scale checks and the physical print-and-assemble acceptance procedure.

Read Guide →

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