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Decision fieldOpen accessFabric Mass Unit ConverterGlobalRemoveOpen accessHook & Needle Diameter ReferenceGlobalRemoveFree accountThreadloop Sewing Pattern DatabaseGlobalRemove
Decision fit
Primary jobChoose materialsLearn techniquesFind patterns & fit
AreaMaterialsYarnPatterns & fit
Best forTranslating the same fabric mass-per-area result between metric and U.S. customary listingsChecking which U.S. alias the current Craft Yarn Council table gives a known metric package size before confirming project gaugeSearching current and out-of-print sewing patterns
Know before usingThe result is a numerical unit conversion, not a new measurement or conformance decision; it does not establish sample or lot representativeness, significant digits, drape, warmth, opacity, thickness, stretch, strength, shrinkage, durability, sewability, end use, target, or tolerance.The reference is not a dimensional measurement, manufacturer inspection, UK or Canadian conversion, steel-hook chart, tool recommendation, yarn assignment, gauge result, or proof that a proposed tool will produce the required fabric.Community members add and quality-control the records, so confirm sizing, measurements, fabric suggestions, format, availability, errata, license, and purchase terms with the designer or publisher. Adding an entry to a stash does not provide the pattern files. Saved searches and private PDF storage are paid Plus features, and a listing or review does not establish pattern accuracy or fit.
Practical access
ForBothMakersMakers
Location or jurisdictionGlobalGlobalGlobal
AccessOpen accessOpen accessFree account
FormatStitch AuthorityStitch AuthorityCommunity
Source typeStitch AuthorityStitch AuthorityCommunity database
Source and review
What the source establishesThe calculator uses the NIST SP 811 Appendix B.8 conversion from avoirdupois ounces per square yard to kilograms per square metre and links to a source-reviewed fabric mass record for method, sampling, conditioning, and product controls.The lookup reproduces the current public Craft Yarn Council metric and U.S. alias rows and follows the Council's warning that company letter and number labels vary; blank aliases remain blank instead of being inferred.Threadloop's official guide describes an independent, fully crowdsourced database covering available and out-of-print sewing patterns. Its search supports pattern type, fabric type, age group, body type, cup size, level, format, file features, language, measurements, availability, and other filters; members can also track a stash, wishlist, projects, reviews, and discussions.
Linked page reviewedJul 16, 2026Jul 16, 2026Jul 21, 2026
Next review dueJul 16, 2027Jul 16, 2027Jan 17, 2027
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