Yarn From Swatch Weight Calculator
Weigh your swatch and scale to the project — the most accurate yarn estimate.
Result
About 825 g of yarn
Weighing your swatch is the most accurate estimate. For a shaped garment, add up the area of all pieces (front, back, sleeves) and enter that total as the project width, with the project height set to 1.
Calculated at fibercalc.site/yarn-from-swatch — free knitting & crochet calculators.
How to use
- Weigh your blocked gauge swatch on a kitchen scale and enter the weight in grams.
- Enter the swatch width and height, and your project’s width and height, all in the same unit.
- Add a safety margin — 10% is a sensible default so you do not run short.
- Read the grams of yarn to buy. Divide by the grams per ball to get the number of balls.
Good to know
- Weighing a swatch is far more accurate than a generic yardage table because it measures your actual yarn, needles and tension.
- For a shaped garment, add up the area of all the pieces (front, back, both sleeves) and use that as the project size — a rough rectangle for each piece is close enough.
- Weigh the swatch after blocking, since blocking changes the area and therefore the grams per unit.
FAQ
- Why weigh the swatch instead of using a yardage chart?
- A chart is a rough average. Your swatch is the real thing — same yarn, needles and tension — so scaling its weight to the project area gives a much more reliable figure.
- How do I turn grams into balls or yards?
- Divide the grams needed by the grams per ball from the ball band, and round up. To get yards, multiply the balls by the yards per ball, or use the Yarn Cost calculator.
- What project size do I use for a sweater?
- Add up the area of every piece — front, back and both sleeves — as rough rectangles, then use that total as the project width × height (or enter the total area as one dimension × 1).