Yarn Yardage Calculator

Yarn needs depend on project area, stitch density, and yarn weight. Heavier yarns (worsted, bulky) cover more square inches per yard than lace or fingering — but stitch pattern matters too. This calculator uses approximate coverage factors by standard CYC yarn weight categories to estimate yardage from width and height in inches.

Project area is width × height in square inches. Each yarn weight has a coverage factor — yards consumed per square inch of fabric at a typical gauge. Lace and fingering use more yardage per inch because stitches are finer; bulky yarns stretch farther per yard. Select the weight that matches your pattern or ball band, not the needle size alone.

Always add a buffer for gauge swatches, joining new skeins, and mistakes — 10% is a common starting point; complex colorwork or lace may need 15–20%. The buffer multiplies your base estimate so you are not short one skein on the last row. Divide total yards by yards per skein (check your label; 220 yards is typical for a 100 g worsted skein) and round up to whole skeins.

Worked example with defaults: a 40 × 50 inch worsted-weight blanket is 2,000 sq in. At the worsted coverage factor of about 1.3 yards per square inch, base yardage is 2,600 yards. A 10% buffer brings the total to roughly 2,860 yards — about 13 skeins at 220 yards each. Buy one extra skein from the same dye lot if the project uses a solid color throughout.

Swatching is the most reliable way to refine this estimate. Knit or crochet a 4-inch square in your pattern stitch, rip it out, and measure the yarn used. Scale that sample to your full dimensions for a number tailored to your tension. Cable, bobble, and colorwork patterns often exceed plain stockinette or single crochet by 10–25%.

When shopping, compare skein yardage across brands — two worsted labels may differ by 30–50 yards per ball. If your label shows meters, convert to yards (meters × 1.094) before entering yards per skein. Store leftover yarn with the band so you know what to reorder for repairs or borders.

Limits: this tool estimates flat rectangular areas. Garments with shaping, sleeves, and ribbing need pattern-specific yardage. Amigurumi and three-dimensional pieces use less area math and more stitch-count guides. Treat the result as a planning number, not a guarantee — especially for hand-dyed yarn where dye lots sell out quickly.