Crochet Calculators
Baby Blanket Crochet Calculator
Use this baby blanket crochet calculator to turn a finished size and your gauge into an exact starting chain, total stitch and row counts, and an estimate of how much yarn you need. Pick a standard baby blanket size or enter your own, and the calculator does the math so you can start your project with confidence.
Last reviewed: June 2026
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Your result will appear here after you press Calculate.
Yarn estimates assume single crochet (sc) and include a 10% buffer. Textured stitches, color changes, and borders use more yarn.
Formula used
The calculator converts your gauge to stitches and rows per inch, then multiplies by the finished size:
- Stitches per inch = gauge stitches ÷ 4
- Starting chain = round(width × stitches per inch) + 1 turning chain
- Total rows = round(length × rows per inch)
- Blanket area = width × length (in square inches)
- Estimated yarn = area × yards-per-square-inch (by yarn weight) × 1.10 buffer
Worked examples
Standard 30 × 40 in baby blanket, worsted weight
With a gauge of 14 sc and 14 rows per 4 inches (3.5 per inch), a 30 × 40 inch blanket needs a starting chain of about 106 stitches and 140 rows. The estimated yarn is roughly 960 yards, or about 3 skeins of 364-yard worsted yarn.
Small 30 × 30 in receiving blanket, DK weight
At 18 sc and 20 rows per 4 inches, a 30 × 30 inch DK blanket starts with about 136 stitches, works up over 150 rows, and uses roughly 855 yards of yarn.
How to use this calculator
- Pick a baby blanket size preset, or choose Custom and enter your finished width and length.
- Crochet a gauge swatch and count how many stitches and rows fit in 4 inches (10 cm); enter both.
- Select your yarn weight and the yards per skein from the ball band.
- Press Calculate to see your starting chain, total rows, and yarn estimate.
- Buy one extra skein to be safe — dye lots can be hard to match later.
Reference chart
| Blanket type | Typical size (in) | Typical size (cm) |
|---|---|---|
| Lovey / security | 14 × 17 | 36 × 43 |
| Preemie | 18 × 24 | 46 × 61 |
| Receiving | 30 × 30 | 76 × 76 |
| Stroller / car seat | 30 × 35 | 76 × 89 |
| Standard baby | 30 × 40 | 76 × 102 |
| Crib | 40 × 60 | 102 × 152 |
Frequently asked questions
How many stitches do I chain for a baby blanket?
Multiply your finished width by your stitches-per-inch gauge, then add one chain for the turning chain. For example, a 30-inch blanket at 3.5 stitches per inch needs about 106 chains. Always chain based on your own swatch, because hook size and tension change the count.
How much yarn do I need for a baby blanket?
A standard 30 × 40 inch single-crochet baby blanket in worsted-weight yarn uses roughly 900–1,100 yards, or about 3 average skeins. Bulky yarn uses less length; lace and fingering use more. This calculator estimates yardage from your blanket area and yarn weight.
What is the most popular baby blanket size?
The most common crochet baby blanket is about 30 × 40 inches (76 × 102 cm). Receiving blankets are often 30 × 30 inches, while crib blankets run around 40 × 60 inches. Choose a size based on whether the blanket is for tummy time, the stroller, or the crib.
Why is my stitch count different from the pattern?
Stitch counts depend on gauge, which depends on your yarn, hook, and tension. If your swatch has more stitches per inch than the pattern, you will need more stitches to reach the same width. Always swatch and recalculate rather than copying a count blindly.
Does this work for any stitch pattern?
The stitch and row counts assume a simple single-crochet fabric. Granny squares, shells, and textured stitches change how many stitches fit per inch and how much yarn they use, so treat the yarn figure as an estimate and add a buffer.
Should I round my starting chain to a stitch repeat?
Yes. If your stitch pattern repeats over a set number of stitches (for example, a multiple of 3 plus 1), round the calculated chain up or down to the nearest valid repeat so the pattern lines up across the row.