General information only
Seam & Scale publishes calculators, guides and references for sewing, quilting and fabric planning. Every project can vary with fabric width, shrinkage, nap, pattern matching, seam allowances, cutting accuracy and construction choices.
Calculator results are estimates
Results depend on the values entered, the formula or dataset used, rounding choices and stated assumptions. A technically correct calculation can still be inappropriate when the inputs or assumptions do not match the real situation.
Professional and official advice
Site results do not replace the instructions supplied with a commercial sewing pattern, fabric manufacturer guidance, equipment safety instructions or project-specific professional advice.
Sources and changing information
We review formulas, references and material changes, but fabric specifications, manufacturer guidance, pattern instructions and third-party information can change after publication.
External links
Links to outside resources are provided for context or convenience. A link does not automatically mean the operator controls, endorses or guarantees the external content.
Use your judgment
Before purchasing or cutting valuable fabric, check the measurements, read the assumptions and limitations, and compare the result with the project pattern or construction plan.