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Blanket yarn calculator

Estimate blanket yarn in grams, meters, yards and whole skeins from a measured swatch.

01 / START WITH YOUR SWATCH

How much yarn will I need?

A blanket estimate grounded in
your yarn, your stitch, your tension.

Your project details

1 Your blanket

Measure the body only. Plan a separately worked border on its own.

2 Your measured swatch

Use the same yarn, hook and stitch as your blanket.

3 From your yarn label

An adjustable planning cushion, separate from the base estimate.

NO MYSTERY NUMBERS

A small sample.
A clearer picture.

A swatch is a small sample made using the yarn, hook and stitch you’ll use for the blanket. Measure and weigh it after preparing it the same way you intend to prepare your finished project.

Read the Craft Yarn Council’s gauge guidance ↗

  1. Scale the area

    Divide blanket area by swatch area. A 100 × 120 cm blanket is 120 times the area of a 10 × 10 cm swatch.

  2. Estimate the yarn

    Multiply that ratio by swatch weight. A 5 g swatch gives a 600 g base estimate. Your yarn label converts this to meters.

  3. Give yourself room

    Add your chosen allowance and round up to whole skeins. With 10% extra and 100 g skeins, that example needs 7 skeins.

Read the method

01 / READ THE GUIDE

Measure a crochet blanket swatch before and after washing

Record width, length, gauge and appearance before and after permitted washing so your blanket plan reflects the fabric you will actually use.

02 / READ THE GUIDE

Why your crochet blanket border waves or pulls inward

Locate a border problem, check stitch distribution and corners, and try a small correction before adding more rounds.

03 / READ THE GUIDE

How to substitute yarn for a crochet blanket

Compare replacement yarn by length, sample gauge and fabric, then revise your blanket quantity before buying whole skeins.

04 / READ THE GUIDE

A crochet blanket project sheet: keep your ideas together

Create a useful blanket planning sheet for colors, pattern details, dimensions, yarn reserves and finishing, with a reusable visual template.

05 / READ THE GUIDE

Plan crochet blanket stripes and yarn for each color

Try a cream, moss and clay stripe layout, then turn your row sequence into a separate yarn budget for each color.

06 / READ THE GUIDE

Estimate blanket yarn from a weighed swatch

Use swatch area and weight to estimate blanket yarn, add an explicit allowance, and round to whole skeins.

07 / READ THE GUIDE

Why a different swatch changes your yarn estimate

See how measured fabric area and swatch weight affect blanket yarn estimates, with a comparison and practical checks.

Explore all four calculators ↗