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Convert yardage between fabric widths — vintage 36″, standard 44″, decor 54″ and 60″, and 108″ wideback.
| 44/45″ wide (pattern) | 36″ wide | 54″ wide | 60″ wide | 108″ wideback |
|---|---|---|---|---|
| 1 yd | 1-1/4 yd | 7/8 yd | 3/4 yd | 1/2 yd |
| 1-1/2 yd | 1-7/8 yd | 1-1/4 yd | 1-1/8 yd | 5/8 yd |
| 2 yd | 2-1/2 yd | 1-3/4 yd | 1-1/2 yd | 7/8 yd |
| 2-1/2 yd | 3-1/8 yd | 2-1/8 yd | 1-7/8 yd | 1-1/8 yd |
| 3 yd | 3-3/4 yd | 2-1/2 yd | 2-1/4 yd | 1-1/4 yd |
| 4 yd | 5 yd | 3-3/8 yd | 3 yd | 1-3/4 yd |
| 5 yd | 6-1/8 yd | 4-1/8 yd | 3-3/4 yd | 2-1/8 yd |
| 6 yd | 7-3/8 yd | 5 yd | 4-1/2 yd | 2-1/2 yd |
Equivalents are by fabric area, rounded up to the nearest 1/8 yard. They assume the cuts can be rearranged across the new width — see the caveats below for when they can't.
Width conversion is an area calculation, and some cuts don't care about area — they care about length or count. A 90″ lengthwise border strip needs 2-1/2 yards of continuous fabric no matter how wide the bolt is. A pattern written as "cut 14 WOF strips" yields longerstrips from wider fabric, not more of them — recount the strips from the pieces you actually need instead of converting the total. And directional or large-scale prints often can't use the extra width efficiently, because every piece still has to point the same way.
For backings, skip the ratio entirely and work from the quilt's dimensions — the backing calculatorhandles both 44″ and 108″ fabric directly.
Standard quilting cotton, extra-wide backing, and everything between.
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Multiply the pattern's yardage by 44 and divide by 60 (about 0.73), then round up to the next 1/8 yard. If a pattern calls for 3 yards of 44"-wide fabric, you need about 2-1/4 yards of 60"-wide fabric. Check first that the pattern's cuts don't rely on specific strip counts — wider fabric yields longer strips, not more of them.
Multiply the vintage yardage by 36 and divide by 42 (the usable width of modern 44/45" quilting cotton), then round up. A vintage pattern calling for 5 yards of 36"-wide fabric needs about 4-3/8 yards of modern quilting cotton. Fabric made before the mid-1900s was commonly milled 36" wide, which is why old patterns look like they demand so much yardage.
Conversion works for total-area yardage, not for cuts that depend on continuous length or strip counts. Border strips cut lengthwise, backing panels, directional prints, large-scale prints you plan to fussy cut, and patterns specified as 'number of WOF strips' all need to be recalculated from the actual cuts rather than converted by ratio.
Quilting cotton is sold as 44/45" wide, but after removing selvages and allowing for slight variation, plan on 40–42" of usable width. That's why most patterns and calculators assume 40" or 42" — and why converting by the nominal 44" number can leave you slightly short. When in doubt, use 42 in the formula instead of 44.
Multiply the 44"-wide backing yardage by 0.41 (44 ÷ 108) and round up. A queen backing that needs 8-1/4 yards of standard-width fabric comes out around 3-1/2 yards of 108" wideback. That is a rough conversion, though — for backings it is more reliable to work from the quilt dimensions directly, which is what the backing calculator does.