Estimate yarn needed for scarves, blankets, and sweaters based on project dimensions.
Every skein label states its yardage, but what a project demands is set by its dimensions and your tension, and estimating by feel is how scarves end up two skeins short. This calculator turns project size into a yarn budget: it multiplies width by length to get fabric area, converts that area to a stitch count using the gauge for the yarn weight, then converts yarn consumed to yards and to skeins at the skein's labeled yardage. The surprise is how much the gauge dominates: a dense tension can raise a blanket's yarn need by a third, and the result is only as good as the gauge you enter.
A concrete input and expected output from the current implementation.
Input
Scarf, stockinette stitch, 8 in wide x 60 in long, worsted weight, gauge 5 st/in and 7 rows/in, 200 yd per skein
Expected output
About 467 yd of yarn. With the 10 percent margin for swatching and tension, 513 yd, which means buying 3 skeins (600 yd).
The scarf is 8 x 60 in, or 480 sq in. At 5 stitches and 7 rows per inch the fabric holds 35 stitches per square inch, so 480 x 35 = 16,800 stitches total. Each stockinette stitch draws about 1 in of yarn, giving 16,800 in, which is 467 yd; the 10 percent margin raises it to 513 yd, and 513 yd requires 3 of the 200 yd skeins.
The estimate rests on stitch count. Width times length gives fabric area; the gauge, stitches per inch times rows per inch, gives stitches per square inch; multiplying the two gives the total stitch count. Each stitch draws roughly its own length of yarn, so the stitch count in inches converts to yards by dividing by 36. Change the gauge and the answer moves almost in proportion.
The yardage divides by the skein's labeled yardage and rounds up, so the answer never shows partial skeins. Tools like this add a margin of 5-15 percent for the swatch, tension drift, and joins, and some scale the result by stitch pattern: garter, ribbing, and cables pull more yarn than stockinette, while crochet generally consumes more than knitting at the same gauge.
At a typical worsted gauge of 4.5 stitches and 6 rows per inch, a 30 x 36 in blanket holds about 29,000 stitches, roughly 810 yd, so plan on 4-5 skeins of a 200 yd worsted once a margin is added. Tension shifts everything: a tighter gauge easily pushes past 5 skeins. Enter your swatch gauge into the calculator for the precise figure.
Yes, usually. Dense crochet stitches such as single crochet consume more yarn than stockinette knitting of the same dimensions, commonly 25-40 percent more, and loopy stitches like popcorn or bobbles add more still. If the calculator has no craft setting, treat its result as the knitting figure and add a quarter to a third. If it does have one, use it.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
Create customizable checklists with groups, due dates, and priorities for any project.
Design a printable daily planner with time blocks, goals, and priority sections.
Measure your typing speed in WPM and accuracy with real-time feedback and stats.
Pomodoro timer with built-in ambient noise (rain, cafe, forest) generated via Web Audio API oscillators.
Stay focused with a customizable Pomodoro timer featuring work and break intervals.
A precise stopwatch with lap tracking, split times, and exportable results.