Open the Blanket Size Calculator in the Briana K App!
Every crochet blanket pattern eventually hits you with some version of the same line: work even until you reach your desired size. Simple enough, except stitch patterns come in repeats, not inches, so “desired size” and “the number of rows where your pattern actually looks finished” aren’t automatically the same thing. Chain the wrong number and you either run out of stitch pattern a few inches short of your target, or you’re stuck fudging a half repeat into the edge and hoping nobody looks too closely.
Disclosure: This post contains affiliate links. Please read my disclosure for more info.
The Blanket Size Calculator does that math for you. Enter your gauge and one repeat from your pattern, and it returns the exact starting chain and row count for whatever size you’re making, drawn to scale so you can see it before you commit a single stitch. It also comes preloaded with 44 standard blanket sizes, so if you’ve ever wondered how many stitches a queen-size blanket actually takes, or what counts as a “standard” throw versus a lapghan, that chart is built right in.
Save for Later • Get a Summary • Pick Up Where You Left Off
What the Blanket Size Calculator Actually Does
The tool walks you through five short steps: your gauge, your stitch repeat, how you want leftover stitches handled, which measurement unit you want to see, and finally the size itself. Change any of the first four and every size in the chart recalculates instantly, so you’re never doing this math more than once per pattern.
Step One: Your Gauge
You can enter your gauge three ways, whichever matches how you actually measured your swatch: per 4-inch swatch (the standard way most patterns list gauge), per 1 inch, or as one full pattern repeat. Enter your stitch and row counts, and the calculator immediately shows you how big a single repeat of your pattern measures in real inches, so you can eyeball whether that matches what your pattern expects before you go any further.
Step Two: Your Repeat
This is where you tell the calculator what “one repeat” of your stitch pattern actually looks like. If your pattern says something like “multiple of 6 sts + 3,” that’s 6 stitches per repeat and 3 edge stitches, and that’s exactly what goes in the first two fields. There’s also a spot for your row repeat (how many rows before the pattern starts over) and a field for any turning chain or foundation-row extra that you add only once, at the very start.
Step Three: How to Fit the Size
Sizes almost never land on a perfect whole number of repeats, so you get to choose how to handle the leftover. There are four strategies to pick from:
- Nearest whole repeat (recommended): lands on complete repeats every time, sometimes a little under your target size, sometimes a little over. Best for patterns where a half repeat would look wrong.
- Always round down: keeps the blanket smaller than your target rather than larger.
- Always round up: keeps it larger than your target rather than smaller.
- Whole repeats plus a partial repeat in the edge stitches: hits your target size closer, at the cost of one partial, less-symmetrical repeat tucked into the edge.
Whichever you pick, the calculator explains what that choice means for your specific numbers right there on the screen, so you’re not guessing.
Step Four and Five: Pick Your Units, Pick Your Size
Toggle between inches and centimeters, then either scroll through the built-in size list or type in a custom target. The result is a to-scale grid of your blanket, plus the number that actually matters: your starting chain, your total row count, how many full repeats that comes out to, and your true finished dimensions (which will usually be a fraction of an inch off your target size, since you’re working in whole repeats, not arbitrary inches). For a teen throw at a standard gauge, for example, that might look like: chain 171, work 136 rows, which comes out to 34 full repeats of a 4-row pattern, finishing at roughly 48¾ by 60½ inches.
One thing to keep in mind before you scroll the chart below: every chain and row number on this page is calculated for one specific gauge and repeat. Change your gauge by even a stitch, and the same size needs a different starting chain. If you ever see a screenshot of the size chart, including the ones in this post, treat those numbers as an example, not a universal answer, and always check your own gauge in the app before you start chaining.
Every Standard Crochet Blanket Size, Built Right In
If you only need one number, the calculator gets you there in five steps. But it’s also a genuinely complete crochet blanket size chart, with 44 preset sizes across six categories, so if you’re not sure what size you’re even aiming for yet, you can just scroll the list:
Baby & Preemie (nursery and hospital sizes, 13 sizes): everything from a 12-by-12-inch micro preemie blanket for a NICU isolette, up through an 18-by-24-inch preemie size, a 24-by-24-inch standard isolette blanket, a 14-by-14-inch security lovey and a roomier 17-by-17-inch version, a 16-by-30-inch bassinet size, an 18-by-36-inch cradle size, a 26-by-30-inch car seat and stroller size, a 30-by-30-inch swaddle-friendly receiving blanket, the classic 30-by-35-inch gift-size baby blanket, a roomier 36-by-42-inch version that grows with a baby, a 36-by-52-inch crib size, and a 40-by-60-inch toddler nap mat size for preschool.
Throws & Lap (the everyday sizes, 7 sizes): a 42-by-52-inch child’s throw for ages 4 to 10, a 36-by-48-inch lapghan sized for seated use from knees to ankles, a 48-by-60-inch teen throw, the 50-by-60-inch standard couch throw, a more generous 52-by-72-inch tall-person throw, a traditional 50-by-65-inch afghan, and a 60-by-80-inch oversized throw built for two people on a couch.
Accessibility & Comfort (purpose-built sizes, 6 sizes): a 36-by-30-inch wheelchair lap blanket sized to clear the wheels without dragging, a 36-by-42-inch full wheelchair blanket that reaches from lap to footrest, a 40-by-60-inch recliner throw made to tuck around a recliner, a 40-by-50-inch chemo or infusion blanket sized to pack small and travel easily, a 48-by-54-inch bed-bound comfort blanket sized as a top-of-bed layer, and a 24-by-70-inch memory or prayer shawl sized for the shoulders and back.
Pet Blankets (sized to common crates and beds, 6 sizes): an 18-by-24-inch size that fits both a small pet or a 24-inch dog crate, a 20-by-28-inch blanket for a 30-inch crate, a 23-by-34-inch blanket for a 36-inch crate, a 28-by-40-inch blanket for a 42-inch crate, and a 40-by-50-inch throw sized to protect a couch cushion from a dog.
Bed Blankets, Top of Bed (covers just the mattress top, standard sizes, 6 sizes): Twin at 38 by 75 inches, Twin XL at 38 by 80 inches, Full or Double at 54 by 75 inches, Queen at 60 by 80 inches, King at 76 by 80 inches, and California King at 72 by 84 inches. If you’ve ever needed to know how many stitches a queen-size blanket takes, at an average gauge, that’s a starting chain in the low 200s, and the calculator gives you the exact number for your own gauge.
Bed Blankets, With Drop (standard coverlet sizing, with about a 12-inch drop over the sides, 6 sizes): Twin coverlet at 65 by 90 inches, Twin XL coverlet at 65 by 95 inches, Full coverlet at 80 by 90 inches, Queen coverlet at 88 by 96 inches, King coverlet at 104 by 96 inches, and California King coverlet at 100 by 100 inches.
Compare All Sizes at Once
Every result screen has a “Compare all sizes at this gauge” section that expands into the full chart above, already calculated for your exact gauge and repeat. That means you can scroll from a preemie blanket to a California King coverlet and see the real chain and row count for every single one, without re-entering your numbers 44 times. It’s the fastest way to decide between, say, a generous throw and an oversized one once you know what your stitch pattern actually costs you per inch.
Three Things to Double-Check Before You Commit
The calculator is doing real math, but it can’t see your actual yarn, your actual tension, or your actual couch. A few things to check before you buy yarn for a blanket’s worth of stitches:
Swatch and block first. The tool says this right at the top for a reason: your gauge can shift once a piece is blocked, sometimes by quite a bit in open or lacy stitch patterns. Measure your swatch the same way you plan to block the finished blanket, not straight off the hook.
Yarn amount is a separate question. Knowing your stitch and row count doesn’t tell you how many skeins to buy. That’s exactly what the Yarn Amount Calculator is for, and the two tools use the same gauge and repeat information.
Whole repeats aren’t always symmetrical repeats. If your fit strategy leaves you with a partial repeat at the edge, check where that lands before you commit. In some stitch patterns it disappears into a border; in others it’s worth planning your border specifically to hide it.
Join The Kindest Community
Join our vibrant community of crafters on Facebook today. Whether you enjoy crafting with others or simply have burning questions, we’ve got you covered – join us now!
Blanket Size Calculator FAQs
Is it free?
Yes. The tool is free, and so is the account you need to get into the app. You can find the app (also free!) here: http://stitch.brianakdesigns.com/
Do I need an account?
Yes, and it is free to set up, and only takes a moment!
Does it work for any stitch pattern, or just simple ones?
Any repeating stitch pattern works, as long as you know the repeat from your pattern instructions (the “multiple of X plus Y” line most patterns include). Solid single crochet doesn’t really have a repeat in the same sense, so for that you’d size by total stitch count directly.
Can I use it for a custom size that’s not on the list?
Yes, you’re not limited to the built-in sizes. Enter your own target dimensions, and the calculator does the same repeat math for whatever size you actually need.
Does it work for knitting?
The math itself works the same way for a knit gauge and repeat, though the tool is built and tested around crochet terminology.
Why does my finished size come out slightly different from the size I picked?
Because the calculator works in whole stitch repeats, not arbitrary inches. Depending on which fit strategy you choose, your finished blanket will land at or near your target, not necessarily on the exact inch.
The Rest of the Free Tools
The Yarn Stash Inventory is one of four free tools in the app, and they work well together.
- Yarn Amount Calculator: four different ways to figure out how much yarn a project actually needs.
- Crochet Time Estimator: turns your stitch count and your real pace into an honest time estimate and a finish-by date.
- Yarn Stash Inventory: track what’s already in your stash so you shop your shelves first.
All four are free right in the app.
More Crochet Patterns You’ll Love
Now that you have a Blanket Size Calculator, here are some of our favorite blanket patterns.
🥂 Cheers, and happy crocheting!
Well, That Was Fun! What’s Next?
