Free Online Calculators
Calculate fabric needed for pattern pieces incl. seam allowance
The fabric calculator works out how much fabric you need for identical pattern pieces, including seam allowance. It checks how many pieces fit side by side across the fabric width and multiplies the rows needed by the piece length. For pieces of different sizes, run it once per size and add the results.
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Work out the finished dimensions of each pattern piece, add seam allowances and hem allowances, then see how many pieces fit side by side across the usable fabric width. Multiply the number of rows by the length of one piece to get the total yardage, and add extra for pattern matching, nap direction and shrinkage.
Free fabric calculators are available on sewing and quilting sites, fabric shop websites and pattern blogs, usually split by project type such as quilts, curtains, upholstery or garments. Look for one that lets you enter your own fabric width, since bolt widths vary.
Fabric width is measured selvage to selvage, across the roll, not along it. For cutting plans use the usable width: measure the full width and subtract the selvages and any damaged or unprintable edge you cannot cut into.
Buying two yards does not change the width โ yardage only describes the length cut from the bolt. The width is whatever the bolt is, so check the fabric's stated selvage-to-selvage measurement before planning your cuts.
It depends on the project and the fabric width: two yards is generous for a simple top, cushion covers or a child's garment, but often tight for a full-length dress, coat or curtains. Wider bolts stretch the same yardage much further than narrow ones.
No โ they cover about the same area but have different shapes. A regular quarter yard is a long narrow strip cut across the full fabric width, while a fat quarter is a half-yard cut in half along the width, giving a squarer piece that suits quilt blocks better.
One of the most frustrating moments in any sewing project is running out of fabric halfway through โ or buying far too much and wasting money. The free Fabric Calculator at simple-calculator.online solves this problem once and for all. By entering your pattern piece dimensions, seam allowance, and fabric width, you get a precise fabric requirement in meters โ ready for your next shopping trip.
The Fabric Calculator is designed to calculate the total amount of fabric needed for a sewing project. It takes into account the size of each pattern piece, how many of each piece you need, the seam allowance on all sides, and the width of the fabric you plan to use. The result is a clear, accurate measurement you can bring to any fabric store or use when ordering online.
Using the calculator is straightforward. Follow these steps to get your fabric estimate:
Suppose you're making a simple summer dress with a front bodice (60ร40 cm), back bodice (60ร40 cm), and two sleeves (35ร25 cm). With a 1.5 cm seam allowance and a 140 cm wide fabric, the Fabric Calculator (one run per piece size) shows 0.63 m for the front and back (2 ร 63ร43 cm incl. seam allowance) and 0.38 m for the sleeves (2 ร 38ร28 cm) โ about 1.01 meters in total, no guesswork required.
Quilting often involves dozens of small pieces. If you need 48 squares of 15ร15 cm each with 1 cm seam allowance, the calculator lays them out across the fabric width (8 per row, 6 rows) and shows 1.02 meters โ add a little extra for cutting waste.
Making four cushion covers (50ร50 cm each) for your sofa? The Fabric Calculator shows instantly whether one meter of fabric is enough or whether you need to buy 1.5 meters โ saving you a second trip to the store.
The seam allowance is the extra fabric between the cut edge and the stitch line. Without it, the finished item would be too small. Standard seam allowances range from 1 cm for delicate seams to 2 cm for outer seams or when working with beginners. Forgetting to include it is one of the most common mistakes in sewing โ the Fabric Calculator ensures it's always accounted for.
This tool is ideal for hobby sewists, fashion design students, and professional tailors alike. Beginners avoid costly mistakes, while experienced sewers can plan complex multi-piece garments efficiently. Sewing teachers can also use it as a classroom resource to demonstrate material planning to students.
The calculator takes one pattern piece size per calculation (length, width and number of identical pieces). For a garment with differently sized pieces, run it once per size and add the results.
The calculator has no pattern repeat field. Add at least one full repeat per major piece to the piece length yourself, or add roughly 15โ20% to the result, so the pattern can be matched at the seams.
The calculation only uses the piece dimensions and is material-independent. Keep in mind that leather cannot be mirrored (folded), so each piece must be cut individually, which increases fabric consumption.
The calculator produces mathematically precise results. However, since real-world cutting always involves some waste, we recommend adding a 10โ15% buffer to the calculated amount.
Absolutely. The Fabric Calculator on simple-calculator.online is 100% free, requires no registration, and works on any device including smartphones and tablets.