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Crochet Blanket Size Calculator

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Created by: Natalie Reed

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Calculate the exact number of stitches, rows, and foundation chain length for any crochet blanket. Choose a standard mattress size or enter custom dimensions, set your gauge, and get precise numbers — including overhang adjustments for bed blankets.

Crochet Blanket Size Calculator

Crochet

Calculate stitches, rows, and dimensions for any blanket size

Blanket Size

Your Gauge (from swatch)

Stitch Type

Note: These results are for guidance only and shouldn't be taken as professional advice. Always double-check with a qualified expert before making decisions.

What is a Crochet Blanket Size Calculator?

A Crochet Blanket Size Calculator helps you determine the exact number of stitches and rows needed for a blanket of any size. Whether you are making a small baby blanket or a king-size bedspread, entering your gauge and target dimensions gives you a precise roadmap before you cast on.

Getting blanket dimensions right is critical. Too narrow and the blanket won't cover the bed; too long and it pools on the floor. This calculator includes standard mattress sizes, adjustable overhang, and stitch-type awareness so your finished blanket fits perfectly every time.

Blanket Size Formulas

Target Width: Mattress Width + (Overhang × 2)

Target Length: Mattress Length + Overhang (foot only) + Pillow Tuck (optional)

Stitches Per Row: (Gauge Stitches ÷ Gauge Width) × Target Width

Total Rows: (Gauge Rows ÷ Gauge Height) × Target Length

Foundation Chain: Stitches Per Row + Turning Chains

When your gauge is measured per 4 inches (10 cm), divide by 4 to get the per-inch rate before multiplying by the target dimension. Always round to the nearest whole stitch.

How to Calculate Blanket Size: Example

Suppose you want a queen-size blanket (60 × 80 in mattress) with 12 inches of overhang on each side. Your gauge is 16 stitches and 12 rows per 4 inches in double crochet.

  1. Target width = 60 + (12 × 2) = 84 inches
  2. Target length = 80 + 12 = 92 inches
  3. Stitches per inch = 16 ÷ 4 = 4 st/in
  4. Stitches per row = 4 × 84 = 336 stitches
  5. Rows per inch = 12 ÷ 4 = 3 rows/in
  6. Total rows = 3 × 92 = 276 rows
  7. Total stitches = 336 × 276 = 92,736 stitches
  8. Foundation chain = 336 + 3 (DC turning chain) = 339 chains

Common Applications

  • Baby Blankets — standard 30 × 36 or 34 × 42 inch sizes for cribs and strollers
  • Throw Blankets — couch-sized 50 × 60 or 50 × 65 inches for everyday use
  • Bed Blankets — twin through king sizes with proper overhang for a polished look
  • Gifts — calculate exact dimensions for personalised blankets with confidence
  • Pattern Resizing — scale any blanket pattern up or down to a different standard size

Tips for Accurate Results

  • Always swatch and block before measuring gauge — many yarns grow after washing.
  • Measure the centre 4 inches of a 6-inch swatch to avoid edge distortion.
  • Add overhang on all three exposed sides of a bed; the headboard side usually needs no extra.
  • If using a border, subtract the border width from the main body dimensions.

Frequently Asked Questions

What size crochet blanket do I need for a queen bed?

A queen-size crochet blanket typically measures 90 × 100 inches (229 × 254 cm) with a generous overhang. Without overhang you can use 60 × 80 inches to match the mattress top. Enter your preferred dimensions and gauge into the calculator to get exact stitch and row counts.

How much yarn do I need for a crochet blanket?

Yarn requirements depend on blanket size, stitch type, and yarn weight. A throw blanket (50 × 60 inches) in worsted-weight double crochet typically needs 1,500–2,500 yards. Use this calculator alongside our Yarn Yardage Calculator for a precise estimate based on your gauge.

What is the best stitch for a crochet blanket?

Double crochet and half double crochet are the most popular blanket stitches because they work up quickly while creating a dense, warm fabric. Single crochet produces a tighter, heavier blanket. Granny squares and shell stitches add visual texture but use more yarn.

How do I add an overhang to my crochet blanket?

Add 10–15 inches to both the width and length of the mattress dimensions. For example, a queen mattress is 60 × 80 inches; with 15-inch overhang on each side, your blanket should be 90 × 110 inches. This calculator includes an overhang option to do the maths for you.

How long does it take to crochet a blanket?

A throw blanket takes roughly 30–50 hours depending on stitch type and your speed. A full/queen blanket can take 60–100+ hours. This calculator estimates total stitches, which you can divide by your stitches-per-minute to approximate project time.

Sources and References

  1. Craft Yarn Council, "Standard Yarn Weight System & Gauge Ranges", 2024
  2. The Crochet Guild of America, "Blanket Sizing Guidelines"
  3. Sleep Foundation, "Mattress Size Chart & Bed Dimensions Guide", 2024