Sewing & Textile Math Center
Fabric, quilts, stitches, patterns, seams and project costs. 20 tools with purposes, formulas and worked examples.
Simple mode uses starting defaults for extra scenario controls. Advanced exposes those controls where available. Change an entry, then press Calculate.
Complete truth table
Formula, calculation steps & example
All 20 tools: purposes and formulas
- Rectangular fabric area — Use the labeled measurements to calculate rectangular fabric area.
A × B (A, B, C refer to the labeled entries)
- Yards to meters — Use the labeled measurements to calculate yards to meters.
A × B (A, B, C refer to the labeled entries)
- Meters to yards — Use the labeled measurements to calculate meters to yards.
A ÷ B (A, B, C refer to the labeled entries)
- Pattern resize factor — Use the labeled measurements to calculate pattern resize factor.
A ÷ B (A, B, C refer to the labeled entries)
- Scaled pattern length — Use the labeled measurements to calculate scaled pattern length.
A × B (A, B, C refer to the labeled entries)
- Quilt block count — Use the labeled measurements to calculate quilt block count.
A × B (A, B, C refer to the labeled entries)
- Quilt width before extra borders — Use the labeled measurements to calculate quilt width before extra borders.
A × B (A, B, C refer to the labeled entries)
- Quilt height before extra borders — Use the labeled measurements to calculate quilt height before extra borders.
A × B (A, B, C refer to the labeled entries)
- Two-sided seam allowance total — Use the labeled measurements to calculate two-sided seam allowance total.
A × B (A, B, C refer to the labeled entries)
- Cut width including seams — Use the labeled measurements to calculate cut width including seams.
A + B + … (A, B, C refer to the labeled entries)
- Stitches along a seam — Use the labeled measurements to calculate stitches along a seam.
A × B (A, B, C refer to the labeled entries)
- Stitch length — Use the labeled measurements to calculate stitch length.
A ÷ B (A, B, C refer to the labeled entries)
- Entered thread-use budget — Use the labeled measurements to calculate entered thread-use budget.
A × B (A, B, C refer to the labeled entries)
- Whole strips across fabric — Use the labeled measurements to calculate whole strips across fabric.
floor(A ÷ B) (A, B, C refer to the labeled entries)
- Total strip length — Use the labeled measurements to calculate total strip length.
A × B (A, B, C refer to the labeled entries)
- Rectangular quilt perimeter — Use the labeled measurements to calculate rectangular quilt perimeter.
A + B + … (A, B, C refer to the labeled entries)
- Quilt batting area — Use the labeled measurements to calculate quilt batting area.
A × B (A, B, C refer to the labeled entries)
- Fabric purchase cost — Use the labeled measurements to calculate fabric purchase cost.
A × B (A, B, C refer to the labeled entries)
- Sewing project materials — Use the labeled measurements to calculate sewing project materials.
A + B + … (A, B, C refer to the labeled entries)
- Fabric waste share — Use the labeled measurements to calculate fabric waste share.
A ÷ B × 100 (A, B, C refer to the labeled entries)
Definitions and source references
Unit definitions and selected model references:
- Virginia Tech: wing geometry and mean aerodynamic chord
- Aircraft Design course: tail volume definitions
- Prusa: filament and printer calculation references
- NIST: SI defining constants
- NASA: aerodynamic lift models
- Horizon Hobby: product and battery documentation
- Smithsonian: Maya calendar units
- NIST: frequency intervals and cents
- NIST: binary prefixes
- NOAA: nautical miles and knots
- RFC 3021: IPv4 /31 point-to-point links
- MDN: exact integer arithmetic
- NIST: international-foot unit conversions
- NASA/JPL: astronomical unit definitions
- NASA: ideal rocket equation
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