Crochet Blanket Lab

Multiply your stitch gauge (stitches per inch, from a blocked swatch) by the blanket width you want, then add the turning chain for your stitch: chain 1 for single crochet, 2 for half double, 3 for double crochet, 4 for treble. Example: a 50-inch throw at 1.75 stitches per inch in double crochet needs 88 stitches, so chain 91. The foundation-chain calculator above does this and also rounds to your stitch pattern's multiple.

A standard 36-by-36-inch baby blanket in worsted-weight yarn at a typical gauge of 4.5 stitches per inch needs 162 stitches. In double crochet (turning chain 3), chain 165; in single crochet (turning chain 1), chain 181. Enter your own gauge and stitch in the calculator above for an exact number — gauge is the only thing that makes the count right.

A 52-by-60-inch throw at 4.5 stitches per inch needs 234 stitches — chain 237 in double crochet (turning chain 3). With chunky yarn at about 1.75 stitches per inch, the same throw needs only 88 stitches, so chain 91 in double crochet. Because gauge decides everything, measure a swatch first and use the calculator above instead of copying a fixed number.

At a worsted-weight gauge of 4.5 stitches per inch, a 90-inch-wide queen needs 405 stitches (chain 408 in double crochet) and a 90-by-108-inch king needs the same width but 378 rows at 3.5 rows per inch. With chunky yarn at 1.75 stitches per inch, a 108-inch king needs just 189 stitches — chain 192 in double crochet. The full size chart above lists chain and row counts for all 17 blanket sizes at your gauge.

It depends on the stitch. In double crochet and taller stitches, the turning chain (ch-3 for dc, ch-4 for treble) usually counts as the first stitch of the row. In single crochet, the turning ch-1 does not count. Half double crochet varies by pattern — most count the ch-2. Always follow your pattern's note; the calculator above shows both the chain total and the row-1 stitch count so you can check either way.

First compute raw stitches: width times stitches per inch. Then round that number to the nearest multiple of your pattern repeat, and add the extra chains. Example: a 50-inch blanket at 1.75 stitches per inch in granny stripe (multiple of 3 + 2) — 87.5 rounds to 29 repeats = 87 stitches, plus 2 = chain 89. Chevron is multiple of 16 + 3, V-stitch is 3 + 3, closed shell is 6 + 1. The calculator above has these multiples built in as presets.

Divide the blanket width by your square size and round up for columns; do the same for the length for rows; multiply. Example: a 52-by-60-inch throw made of 6-inch squares needs 9 columns by 10 rows = 90 squares, finishing at 54 by 60 inches. A 36-inch baby blanket of 4-inch squares needs 81. The granny-square planner above computes the grid, the finished size, the number of joining seams, and a rounds-per-square estimate.

The most common crochet baby blanket size is 36 by 36 inches (90 by 90 cm), from the widely used blanket size chart. Related baby sizes: lovey 12 by 12, security 16 by 16, stroller 30 by 36, receiving 40 by 40, toddler 36 by 48, crib 40 by 60. The size chart on this page lists all 17 standard sizes in inches and centimeters with a one-click preset for every calculator.

It depends on blanket size, stitch, and yarn thickness — not just size. A 52-by-60-inch throw in double crochet with worsted yarn takes about 1,700 yards; the same throw in single crochet takes about 2,650; in waffle stitch about 2,150, because dense stitches eat more yarn. A 90-by-108-inch king in double crochet takes about 5,350 yards of worsted. The yarn estimator above computes yardage from your blanket's area, stitch type, and gauge, with a 10% contingency option and a skein count.

Dense, textured stitches are the yarn-eaters: bobble/popcorn uses the most, followed by single crochet and waffle stitch (about 35% more than double crochet for the same area). The most economical blanket stitches are open ones like granny stripe and V-stitch. The yarn estimator above ranks stitches by yardage per square inch so you can compare before you commit to a stitch.

Each border round adds stitches around the whole perimeter: round 1 has 2 times (width + length) times your stitches per inch; every later round grows the perimeter by 8 times the row height. Example: a 52-by-60-inch blanket with 3 rounds of single crochet at 5 stitches per inch needs about 1,120 + 1,127 + 1,133 = 3,380 border stitches and roughly 107 yards. The border calculator above gives per-round stitch counts, total stitches, border width, and yardage.

The usual cause is a tight foundation chain — most crocheters chain tighter than they stitch. Fix it by chaining with a hook one size larger, working into the back bump of the chain, or using a foundation single/double crochet row instead of a chain. Gauge drift is the second cause: if your stitching tightens as you go, the blanket narrows. The calculator's finished-width readout tells you what width your chain count actually produces at your measured gauge.

For the same finished size, C2C and row-by-row blankets use similar amounts of yarn per square inch at the same gauge — the difference comes from the stitch, not the construction direction. C2C's advantage is that you stop exactly when the blanket is big enough, so there is no leftover-row waste. The yarn estimator above includes a C2C rate; the foundation-chain math does not apply to C2C since it starts from a corner.

Only the blanket size chart applies to knitting — foundation chains, turning chains, stitch multiples, and granny-square math are crochet-specific. For knitting gauge math, cast-on calculations, and needle-size conversion, use our knit-crochet-lab tool, which covers those. Blanket yarn yardage there is garment-style; this page's estimator is built for crochet stitch density.

Never copy the pattern's chain count if your gauge differs. Measure your own stitches per inch from a blocked swatch, then recompute: chains = width times your stitches per inch, rounded to the pattern's multiple, plus the turning chain. Rows = length times your rows per inch. That is exactly what the foundation-chain calculator does — enter your numbers and it gives the corrected chain and row counts.

No. This page is 100% client-side: every calculation runs in your browser with plain JavaScript, there are no accounts, no analytics beacons in the tool itself, and no network requests to any server. Your gauge numbers and blanket dimensions never leave your device. You can even save the page and use it offline.