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HDC throw blanket, a rough yardage guide for worsted weight yarn

Yarn Yardage Guide for HDC Throw Blankets

By Stoutomaster
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Estimate yarn usage for different blanket sizes

Baby (30" x 35") - Approx. Yardage : 900 – 1100 yards
Throw (50" x 60") - Approx. Yardage : 1500 – 2200 yards
Twin (65" x 90") - Approx. Yardage : 2500 – 3200 yards
Full/Queen (90" x 90") - Approx. Yardage : 3500 – 4200 yards
King (108" x 100") - Approx. Yardage : 4500 – 5000+ yards

Determine yarn usage

Determine yarn usage for a half double crochet (HDC) blanket, the most accurate method is to make a swatch and use it to estimate the total yarn needed. Here’s how you can do it step by step.

Step 1: Make a Swatch

  • Use the same yarn and hook size as you plan for your blanket.
  • Make a square swatch — about 4" x 4" or larger.
  • Count how many yards (or meters) of yarn it takes to make that swatch.

Tip: Use a kitchen scale to weigh your swatch. Then calculate yarn usage like this

Step 2: Calculate Yarn Usage per Inch

Example:

  • Your 4" x 4" swatch weighs 10 grams; your yarn label says 1 skein = 100g = 200 yards

So:

  • 10g = (10 / 100) × 200 yards = 20 yards used for 4" x 4"

Now:

  • Area of swatch = 16 square inches / Yarn used per square inch = 20 / 16 = 1.25 yards/in²

Step 3: Calculate Total Yarn for Blanket

  • Say your blanket is 50" x 60" = 3,000 square inches

Then:

  • 3,000 × 1.25 yards = 3,750 yards needed

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