DIY Granny Square Crocheted Blanket | Free Crochet Pattern

There is something deeply satisfying about making a granny square blanket. Maybe it is the rhythmic motion of the hook pulling yarn through loops, or maybe it is watching a small, colorful square grow in your hands and knowing that dozens more just like it will one day come together into something warm, useful, and genuinely beautiful. Whatever the reason, granny square blankets have remained one of the most popular crochet projects in the world for generations, and once you make your first one, it is easy to understand why.

This free pattern will walk you through every step of the process, from choosing your yarn and hook to joining your squares and finishing your edges. Whether you are picking up a crochet hook for the first time or you have been crocheting for years and just want a reliable go-to pattern, this guide has everything you need.

What Is a Granny Square?

A granny square is a small crocheted motif that is worked in the round, typically starting from a central ring and building outward in clusters of double crochet stitches separated by chain spaces. The result is a geometric, lacy-looking square that can be made in a single color or in many colors at once.

The classic granny square design dates back well over a century. It became especially popular in the 1960s and 1970s as part of a broader revival of handcrafts, and it has never really gone away. Today, granny squares appear in everything from blankets and bags to cardigans, pillows, and wall hangings. The design is endlessly versatile, and once you learn the basic construction, you can modify it in dozens of ways to create your own unique fabric.

For a blanket, granny squares are particularly ideal because they are portable, manageable, and perfect for using up leftover yarn. You can work on individual squares while traveling, watching television, or sitting outside, and then assemble them at home into a finished piece.

Materials You Will Need

Before you begin, gather everything on this list. Having your supplies ready before you start will make the whole process feel much smoother.

Yarn: Worsted weight yarn (size 4) is the most forgiving and beginner-friendly option for this project. You can use a single color for a monochromatic look, two or three colors for a more traditional aesthetic, or a whole rainbow of colors for a maximalist, scrappy style. A finished blanket approximately 48 x 60 inches will require around 1,500 to 2,000 yards of yarn total, depending on your square size and joining method.

Hook: A 5.0mm (US size H/8) or 5.5mm (US size I/9) crochet hook works well with worsted weight yarn. Choose whichever size gives you a fabric you like. If your stitches feel tight and the fabric is stiff, go up a hook size. If everything feels loose and floppy, go down.

Scissors: A sharp pair for cutting yarn ends cleanly.

Yarn needle: Also called a tapestry needle or darning needle. You will use this to weave in your ends and, if you choose, to join your squares.

Stitch markers: Optional but helpful, especially for beginners who want to mark the beginning of a round.

Tape measure or ruler: For checking that your squares are the right size.

Understanding the Basic Stitches

If you are new to crochet, here is a quick rundown of the stitches you will use in this pattern.

Chain (ch): The most foundational stitch in crochet. You make a slip knot, then pull loops through each other to create a chain of connected loops.

Slip stitch (sl st): A very short stitch used mainly to join rounds or move the working yarn to a new position without adding height.

Double crochet (dc): The workhorse stitch for granny squares. Yarn over, insert hook into the stitch or space, yarn over and pull through, yarn over and pull through two loops, yarn over and pull through the remaining two loops.

Chain space (ch-sp): The open space created by a chain of one or more stitches between clusters of double crochets. These spaces give the granny square its characteristic open, lacy look.

If these terms are unfamiliar to you, take a few minutes to practice them before diving into the pattern. Even 15 or 20 minutes of practice swatching will make the actual squares feel much easier.

The Classic Granny Square Pattern

This is the traditional four-round granny square. Each finished square measures approximately 4 to 5 inches depending on your tension and hook size. You will need 80 to 120 squares for a standard throw blanket, so settle in and enjoy the process.

Round 1:

Make a slip knot and chain 4. Join with a slip stitch to the first chain to form a ring. Chain 3 (this counts as your first double crochet throughout the pattern). Work 2 more double crochets into the center of the ring. Chain 2. Work 3 double crochets into the ring, chain 2. Repeat this two more times so that you have four groups of 3 double crochets separated by four chain-2 spaces. Join with a slip stitch to the top of the beginning chain-3. If you are changing colors, fasten off here. If you are working in a single color, continue directly to round 2.

Round 2:

Join your yarn (or continue if using one color) in any chain-2 corner space. Chain 3, work 2 double crochets, chain 2, then work 3 more double crochets into the same corner space. This creates your first corner cluster. Chain 1. Move to the next chain-2 corner space and repeat: work 3 double crochets, chain 2, 3 double crochets, chain 1. Continue around all four corners in the same way. Join with a slip stitch to the top of the beginning chain-3. Fasten off if changing colors.

Round 3:

Join yarn in any corner chain-2 space. Chain 3, work 2 double crochets, chain 2, and 3 more double crochets in the same corner space. Chain 1. Work a cluster of 3 double crochets in the chain-1 space on the side. Chain 1. Work the full corner cluster (3 dc, ch 2, 3 dc) in the next corner space. Chain 1. Continue in this pattern around all four sides and all four corners, placing side clusters in the chain-1 spaces and full corner clusters in the chain-2 spaces. Join with a slip stitch to the top of the beginning chain-3. Fasten off if changing colors.

Round 4:

This round adds one more ring of clusters around the outside to give you a slightly larger square and a more polished look. Join yarn in any corner space. Work the full corner cluster (3 dc, ch 2, 3 dc). Chain 1. Work 3 double crochets in the first side chain-1 space. Chain 1. Work 3 double crochets in the second side chain-1 space. Chain 1. Work the full corner cluster in the next corner. Repeat around all four sides. Join and fasten off.

Your finished square should be flat, even, and roughly square in shape. If it curls up at the edges, try going up a hook size. If it ruffles at the edges, try going down a hook size.

Weaving In Ends

If you changed colors at every round, you now have eight ends per square to weave in. This is arguably the least glamorous part of making a granny square blanket, but it is important. Ends that are not properly secured will work their way loose over time and unravel your stitches.

Thread your yarn needle with one tail at a time and weave it through the backs of several stitches, changing direction at least once to anchor it. Trim the remaining tail close to the fabric. Some crocheters like to weave in ends as they go, after each square is finished. Others prefer to save all the weaving for one big session at the end. Do whatever works best for your personality and workflow.

Choosing Your Color Scheme

One of the most enjoyable parts of planning a granny square blanket is deciding on your colors. Here are a few approaches that work especially well.

A scrappy rainbow blanket uses every color you have on hand, made completely randomly. These blankets have an exuberant, carefree energy and are a wonderful way to use up partial skeins from other projects.

A two-color blanket uses one color for the center rounds and another for the outer round, creating a clean, graphic look. Navy and cream, rust and tan, forest green and cream — these classic two-color combinations always look elegant and timeless.

A gradient blanket arranges squares in a spectrum from one color to another — from pale yellow through orange to deep red, for example — creating a subtle, painterly effect across the finished blanket.

A tonal blanket uses many different shades of one color family, creating a sophisticated, cohesive look that is easy to live with in almost any home decor context.

Whatever palette you choose, lay out your yarn skeins together before you start and make sure you are happy with how the colors interact. Natural daylight is the best light for this kind of color evaluation.

Making All Your Squares

Before you join anything, make all the squares you need for your blanket. For a lap blanket, aim for a 9×12 arrangement (108 squares). For a full throw, a 10×14 arrangement (140 squares) works beautifully. For a large bed blanket, you might want a 12×16 arrangement or larger.

Making all your squares before assembling gives you the freedom to audition different arrangements on the floor or a flat surface. You might discover that you want to alternate light and dark squares in a checkerboard pattern, or cluster similar colors in a gradient, or mix everything up completely for a maximally scrappy effect. Seeing all your squares at once gives you options that you would not have if you joined as you went.

Try to keep your tension consistent across all your squares. If you notice that some of your earlier squares came out smaller or tighter than your later ones as your tension relaxed, set those aside for the edges or try blocking them (dampening and pinning them to shape) to even things out.

Blocking Your Squares

Blocking is the process of wetting, pinning, and drying your crocheted pieces so that they dry in exactly the shape you want them. It is not strictly necessary for every project, but for a granny square blanket, even a light blocking can make a noticeable difference. Squares that have been blocked lie flat, have more defined stitch definition, and join together much more easily because their dimensions are more uniform.

To wet block your squares, simply submerge them in cool water, gently squeeze out the excess (do not wring or twist), and then lay each square flat on a blocking mat or a clean towel. Use rust-proof pins to pin each corner at an exact right angle and each edge into a straight line. Let them dry completely before unpinning. Depending on your yarn fiber and your climate, this may take anywhere from a few hours to overnight.

Joining Your Squares

There are several ways to join granny squares, and the method you choose will affect both the look and the drape of your finished blanket.

The slip stitch join creates a flat seam on the wrong side of the work. Place two squares with right sides facing each other, and slip stitch through both sets of corresponding edge stitches along one side. This join is quick and nearly invisible on the right side, and it creates a very flat, flexible blanket.

The single crochet join creates a raised ridge on the right side. Place two squares with wrong sides facing each other and single crochet through both sets of corresponding edge stitches. The resulting ridge becomes a visible design element, and when done in a contrasting color, it can look intentional and beautiful.

The flat slip stitch join worked flat is done with both squares right-side up, inserting the hook through the back loops only of the corresponding edge stitches. This creates a very flat seam with minimal bulk.

The whipstitch join uses a yarn needle rather than a crochet hook and creates a neat, flat seam on the wrong side. Thread your yarn needle and whipstitch through the back loops of corresponding edge stitches. This method is slower but gives an extremely tidy finish.

For a beginner, the single crochet join on the wrong side is generally the easiest to execute consistently, and it creates a sturdy, even seam. Join your squares into rows first, then join the rows together into the full blanket panel.

Adding a Border

A border pulls everything together and gives your blanket a finished, professional look. Even a single round of single crochet around the entire outer edge makes a big difference.

For a simple border, join your yarn at any corner, work 3 single crochets in the corner stitch to turn the angle, then work evenly along each side, placing a single crochet in each stitch and working 2 or 3 single crochets in the spaces to keep things lying flat. When you reach each corner, again work 3 single crochets to maintain a sharp right angle. Join and fasten off, or continue with additional rounds.

For a more decorative border, consider a shell stitch border, a picot border, or a simple reverse single crochet (also called crab stitch) border. All of these are worked in the same fundamental way, just with slightly different stitch patterns along the edge.

Caring for Your Finished Blanket

Once your blanket is complete, check the care instructions on your yarn label for the best guidance. Most acrylic yarns are machine washable and dryer safe, which makes them very practical for blankets that will see a lot of use. Cotton and cotton blend yarns are also generally machine washable but may benefit from air drying to prevent shrinkage. Wool and other animal fibers usually require hand washing in cool water and flat drying.

If your blanket was a gift or will live somewhere it could get heavy use, choosing a machine-washable fiber from the start is a very practical decision.

Final Thoughts

A granny square blanket is one of those projects that rewards both patience and creativity. The individual squares come together almost magically into something that is greater than the sum of its parts — warm, colorful, textured, and full of the hours you spent making it. Whether you make this blanket for your own home, as a gift for someone you love, or simply as a way to enjoy the meditative rhythm of crochet, the result will be something you can be genuinely proud of.

Take your time, enjoy the process, and do not worry about perfection. A little variation in tension and a few imperfect squares are what give a handmade blanket its character and charm. Now pick up your hook, choose your colors, and make your first square. There is no better moment to start than right now.