Provenance
Sources and derivations
Every citation ID resolves to a record with title, publisher, URL, access date, support scope, and review notes.
SI Units — Length
- Source ID
core-unit-factors- Publisher
- National Institute of Standards and Technology
- Accessed
- 2026-07-13
- Supports
- The exact inch-to-millimeter definition and consistent SI length conversion policy.
- Notes
- Core factors are encoded once in the sewing-core package and reference values are generated from those functions.
Deterministic rectangular shelf-layout derivation
- Source ID
derived-layout-method- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Row placement, rotation gating, layout length, utilization, and non-optimality disclosure.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Fabric purchase adjustment derivation
- Source ID
derived-purchase-policy- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Shrinkage reversal, explicit waste, and upward shop-increment rounding order.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Pattern repeat allowance derivation
- Source ID
derived-repeat-formula- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Vertical repeat ceiling and separate horizontal alignment offset.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Cut dimension allowance derivation
- Source ID
derived-cut-dimensions- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Finished width and height plus independent opposing edge allowances.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Uniform print scale correction derivation
- Source ID
derived-print-scale-formula- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Intended calibration divided by measured calibration with a separate desired scale.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Binding strip and area derivation
- Source ID
derived-binding-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Fold multipliers, strip joins, continuous-bias area, and square-side estimate.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Circle sector radius and footprint derivation
- Source ID
derived-circle-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Arc-angle radii and conservative sector bounds.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Pleat and gather fullness derivation
- Source ID
derived-fullness-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Source width, take-up, whole repeat count, and remainder.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Curtain panel and cut-drop derivation
- Source ID
derived-curtain-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Fullness width, usable panel width, panel count, cut drop, and repeat rounding.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Cushion cover cut-piece derivation
- Source ID
derived-cushion-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Zippered and envelope pieces, overlap, piping perimeter, and rectangular layout.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Before-cutting calculation review method
- Source ID
calculation-review-method- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Input traceability, hand reconciliation, warning review, and physical template verification.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Commercial pattern precedence policy
- Source ID
pattern-instruction-precedence- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- The rule that specific tested commercial pattern dimensions and instructions override general site calculations.
- Notes
- This is a scope and editorial policy, not a reproduction of any commercial pattern content.
Qualified retail fabric-width observation record
- Source ID
retail-width-observation- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- 44, 45, 54, and 60 inches as common retail examples rather than universal categories.
- Notes
- Every public mention includes a qualification to verify the selected bolt and usable width.