How Much Fabric Do I Need? A Practical Yardage Guide

The pattern envelope already tells you the yardage. The problem is that the envelope assumes a fabric with no nap, no one way print, no plaid to match, a size in the middle of the range, and a body that matches the pattern block. Change any one of those and the number moves.

This guide gives you a working number when you do not have a pattern in front of you, and tells you what to add when you do.

Starting numbers by project

These assume a woven fabric with no directional print and an average adult size. Two columns, because fabric width changes everything: quilting cottons and many apparel cottons come 42 to 45 inches wide, while most suitings, knits and home decor fabrics come 54 to 60 inches wide.

Run your own numbers with the fabric yardage calculator, which handles width, nap and a shrinkage allowance in one pass. For quilt backs specifically, the quilt backing calculator works out how many widths of fabric you need and where the seams land.

The four things that add yardage

1. Nap and one way prints

Velvet, corduroy, suede cloth, fleece and satin all reflect light differently depending on which way the pile or the weave runs. Cut two pieces facing opposite directions and they will read as two different colours in daylight. The same is true of any print that only looks right one way up, from a border print to a row of teapots.

All the pieces must therefore be laid out pointing the same way, which stops you from nesting them head to toe. Add roughly 15 to 25 percent, or use the "with nap" line on the pattern envelope if there is one.

2. Plaids, stripes and large repeats

Matching a plaid across a side seam means shifting pieces along the fabric until the lines line up, and the fabric you skip past is fabric you paid for. The rule of thumb is to add one full pattern repeat for every major pattern piece. A 2 inch check adds very little. An 8 inch tartan on a jacket can add most of a yard.

3. Shrinkage

Natural fibres shrink in the first wash: cotton typically 2 to 5 percent, linen 3 to 8 percent, wool more than that if it sees heat and agitation. Buy the fabric, wash and dry it exactly the way you plan to launder the finished garment, then cut. Adding 5 to 10 percent at purchase covers this, and it is far cheaper than discovering the shortfall after preshrinking.

4. Your own size and alterations

Pattern yardage is quoted per size, and the largest sizes on the envelope often need a different layout entirely. Full bust adjustments, added length, wider hems and a swayback adjustment all consume fabric. If you routinely lengthen a bodice or add to the hip, add a quarter yard and stop thinking about it.

Reading the bolt end

The cardboard end of the bolt carries the width, the fibre content, the care instructions and the price per yard. Photograph it before you take the bolt to the cutting table. Once the fabric is off the bolt and in your bag, that information is gone, and fibre content is the single thing you will most want three months later when you are choosing a pressing temperature or a needle and thread.

Buying online without regret

• Order a swatch first for anything expensive or colour critical. Screens lie about colour, and no photograph tells you about hand or drape.
• Check whether the listed width includes the selvedge. Some shops quote usable width, some quote total width, and the difference is an inch or two that can matter on a tight layout.
• Read the cut policy. Most fabric is cut to order and therefore not returnable. That is normal, not a red flag, but it means the swatch is your only protection.
• Watch the repeat on prints. Large repeats need more yardage and are worth confirming before you buy.

For anything you want to see and feel first, our shop directory lists fabric stores, quilt shops and yarn shops across the United States by state and city.

What to do with the leftovers

Keep scraps sorted by fibre, not by colour. A labelled bag of cotton scraps becomes bias binding, pocket bags, test seams for tension checks and quilt piecing. A bag of unlabelled mystery blends becomes a bag you never open. Cut a one inch square of every fabric you buy and staple it to an index card with the fibre content and the wash instructions, and you will have built a genuinely useful reference within a year.