Learning how to increase and decrease in crochet is essential for creating shaped pieces beyond basic rectangles and squares. Increasing means placing two or more stitches into a single stitch from the previous row, while decreasing involves working two or more stitches together to reduce your stitch count. These fundamental techniques allow you to shape garments, create fitted amigurumi, and add dimension to your projects.
If you've been sticking to straight scarves and simple blankets, mastering increases and decreases will expand your crochet possibilities significantly. You'll be able to tackle patterns that require shaping for armholes, necklines, curves, and tapered edges. The techniques work across all basic stitches, from single crochet to double crochet and beyond.
This guide will walk you through the specific methods for increasing and decreasing with different stitch types, show you where to place these shaping techniques in your rows, and provide practical examples you can use in real projects. You'll also learn how to read pattern abbreviations and achieve even, professional-looking results in your finished work.
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Understanding Increases and Decreases in Crochet
Increasing and decreasing in crochet controls stitch count to shape your fabric, transforming flat pieces into fitted garments, rounded amigurumi, or tapered hats. These techniques add stitches to expand your work or combine stitches to contract it.
What Are Crochet Increases?
A crochet increase adds extra stitches to your row or round by working multiple stitches into a single stitch from the previous row. The most common method is working two stitches into one stitch, though you can work three or more for sharper expansion.
When you create an increase in crochet, you're telling your fabric to spread outward at that point. This happens because you're creating more loops in the same space, forcing the fabric to flare or curve. You'll use increases to widen scarves, create circular bases for hats, expand sleeves, or form rounded shapes in amigurumi.
The notation varies by pattern. You might see "inc," "2 sc in next st," or simply instructions to work multiple stitches in one location. Each stitch type has its own increase method, but the principle remains identical across single crochet, half double crochet, and double crochet.
What Are Crochet Decreases?
A decrease in crochet combines two or more stitches into one, reducing your total stitch count. You work partway through multiple stitches, leaving loops on your hook, then complete them together as a single stitch.
The standard method for decreasing in crochet involves pulling up loops through consecutive stitches, then joining them with a final yarn over. For single crochet, you insert your hook into the first stitch and pull up a loop, insert into the next stitch and pull up another loop, then yarn over and pull through all three loops on your hook.
Different stitch heights require modified decrease techniques. Taller stitches like double crochet need you to work further into each stitch before combining them. The invisible decrease method, which works through front loops only, creates a neater finish for single crochet projects.
The Role of Shaping in Crochet
Shaping in crochet transforms two-dimensional fabric into three-dimensional objects through strategic placement of increases and decreases. Without shaping, you can only create flat rectangles or basic tubes.
The placement and frequency of your shaping determines the final form. Evenly spaced increases around a circular base create flat circles for coasters or hat crowns. Decreases clustered at specific points create curves for necklines or the tops of beanies. Paired increases and decreases along garment sides create waist shaping or sleeve tapers.
Your stitch count changes with every increase and decrease in crochet. A pattern might start with 60 stitches, increase to 72 for width, then decrease back to 60 for a fitted waist. Tracking these changes prevents distortion and maintains the intended shape throughout your project.
Techniques for Crochet Increases
Crochet increases add stitches to your work by placing multiple stitches into a single stitch from the previous row or round. The technique varies slightly depending on the stitch height you're using, but the core principle remains the same across all stitch types.
Single Crochet Increase
A single crochet increase is the most basic way to add stitches to your work. You create it by working two complete single crochet stitches into the same stitch from the previous row or round.
Insert your hook into the designated stitch, yarn over, and pull up a loop. Yarn over again and pull through both loops on your hook to complete the first single crochet. Without moving to the next stitch, insert your hook into that same stitch again and work another complete single crochet.
This technique works well when you're starting projects in a magic ring or shaping flat circles. For a basic flat circle, you'll typically start with 6 single crochets in your magic ring, then increase by 6 stitches each round to maintain flatness.
Place your increases strategically to avoid creating visible corners in your work. Stagger them from round to round rather than stacking increases directly on top of each other.
Double Crochet Increase
Double crochet increases follow the same logic as single crochet but accommodate the taller stitch height. You work two complete double crochet stitches into one stitch from the previous row or round.
Start by yarning over before inserting your hook into the designated stitch. Pull up a loop, then yarn over and pull through two loops twice to complete the first double crochet. Yarn over again and insert your hook into that same stitch to work a second complete double crochet.
The increased height of double crochet means these increases are more visible than single crochet increases. Use them when working in double crochet fabric where a single crochet increase would create an unwanted dip in your stitch height.
Patterns often specify "2 dc in next st" or "dc inc" to indicate this technique. The extra fabric created by double crochet increases makes them ideal for creating flare in garments or expanding the diameter of worked-in-the-round projects.
Half Double Crochet Increase
Half double crochet increases bridge the gap between single and double crochet techniques. You create them by working two complete half double crochet stitches into the same stitch.
Yarn over before inserting your hook into the stitch, pull up a loop to get three loops on your hook, then yarn over and pull through all three loops. Repeat this process in the same stitch to create your second half double crochet.
This increase maintains the medium height characteristic of half double crochet while adding width to your project. It's particularly useful when you need moderate expansion without the bulk of double crochet or the density of single crochet.
Invisible and Extended Increases
Invisible increases create smoother shaping by working only through specific loops rather than the entire stitch. For single crochet, insert your hook under the front loop of one stitch and the back loop of the next stitch, then complete as a single increase.
This technique minimizes the visible "V" that standard increases create, making it essential for amigurumi and other projects where seamless shaping matters. The decrease equivalent uses only front loops to maintain stitch appearance.
Extended increases add even more stitches to a single location when patterns require rapid expansion. You might work three, four, or even more stitches into one stitch, typically in corners or when creating ruffles. A pattern might specify "3 sc in next st" for corners or "5 dc in next st" for shell patterns.
Methods for Crochet Decreases
Decreasing involves working multiple crochet stitches together to turn two or more stitches into one stitch. Each basic stitch requires a slightly different technique, though all accomplish the same goal of reducing your stitch count to shape your work.
Single Crochet Decrease (sc2tog)
The single crochet decrease, abbreviated as sc2tog, combines two single crochet stitches into one. You start by identifying the two stitches you want to decrease over. Insert your hook into the first stitch and pull up a loop, leaving you with two loops on your hook.
Next, insert your hook into the second stitch and pull up another loop. You now have three loops on your hook. Yarn over and pull through all three loops at once to complete the decrease. This creates one stitch where there were previously two.
The sc2tog technique is frequently used in amigurumi projects and when shaping garment edges. It creates a clean, tight decrease that maintains the fabric's structure without leaving visible gaps.
Double Crochet Decrease (dc2tog)
The double crochet decrease, or dc2tog, is more involved than the single crochet version. Begin by identifying your two target stitches. Yarn over, insert your hook into the first stitch, and pull up a loop to get three loops on your hook.
Yarn over again and pull through two loops, leaving two loops remaining on your hook. Now yarn over, insert your hook into the second stitch, and pull up a loop, giving you four loops total. Yarn over and pull through two loops, reducing to three loops on your hook.
Finally, yarn over one more time and pull through all three remaining loops. This completes the decrease, joining two double crochet stitches into a single stitch. The dc2tog works well for projects requiring taller stitches and creates a gradual shaping effect.
Half Double Crochet Decrease (hdc2tog)
The half double crochet decrease sits between single and double crochet in complexity. Start by yarning over and inserting your hook into the first of your two target stitches. Pull up a loop to create three loops on your hook.
Yarn over again, insert your hook into the second stitch, and pull up another loop. You now have five loops on your hook. Yarn over one final time and pull through all five loops at once to complete the hdc2tog.
This technique provides a medium-height decrease that's useful for projects where single crochet would be too short and double crochet too tall. The hdc2tog maintains consistent tension and creates smooth transitions in shaped pieces.
Invisible Decrease Techniques
The invisible decrease minimizes the appearance of decreases in your work, particularly useful for amigurumi where visible decreases can create unsightly gaps. Instead of inserting your hook under both loops of each stitch, you insert through the front loop only of each of the two stitches you're decreasing.
Pull up a loop through the front loop of the first stitch, then through the front loop of the second stitch. You'll have three loops on your hook. Yarn over and pull through all three loops to complete the invisible decrease.
This method works best with single crochet stitches and is primarily used when working in the round. The technique can be applied to turned rows, though the textured nature of row work often makes standard decreases less noticeable. The invisible decrease creates a tighter, neater finish that blends seamlessly into your fabric.
Applying Increases and Decreases: Practical Examples
The placement and frequency of increases and decreases determine whether you create flat fabric, curved edges, or three-dimensional forms. How you apply these techniques differs significantly between working in rows versus rounds, and the specific approach changes based on whether you're shaping a sweater, making a hat, or crafting a stuffed animal.
Working in Rows vs. Rounds
When working in rows, increases and decreases typically occur at the edges or within the fabric to create sloped edges or shaped panels. For edge shaping, you can work two stitches into the first or last stitch of a row to increase. To decrease at row edges, skip the first stitch or work the last two stitches together.
Internal shaping requires more planning. You place increases or decreases several stitches from the edge to create smooth curves rather than stepped edges. For example, to shape a cardigan front, you might work 3 single crochet stitches, decrease, continue across, then decrease again 3 stitches before the end.
Working in rounds follows different rules. You typically start with a magic ring and work increases evenly around to maintain flat fabric. A basic circle in single crochet starts with 6 stitches in the magic ring, then increases by 6 stitches each round (12, 18, 24, 30). Stagger the placement of increases across rounds to prevent obvious corners from forming.
Shaping Garments and Accessories
Fitted garments require strategic placement of increases and decreases along specific points. Waist shaping uses paired decreases at side "seams" to create an inward taper, followed by paired increases to flare at the bust or hips. You work these changes 2-3 stitches from the edge marker to create smooth lines.
Necklines demand gradual shaping rather than abrupt changes. Decrease every other row initially, then every row as you approach the shoulder to create a curved edge. For V-necks, place a single decrease at the center front on alternating rows.
Sleeve caps use a combination of techniques. Work decreases at both edges every row for the initial slope, then every other row for the curve, and finally bind off several stitches at once for the top. Hat brims often use double crochet for height with evenly spaced increases, then switch to single crochet stitch worked even for the sides.
Amigurumi and 3D Forms
Amigurumi relies on precise increase and decrease placement to create spheres, ovals, and complex shapes. A basic sphere starts with 6 single crochet in a magic ring, increases by 6 each round until reaching the desired diameter, works several rounds even, then mirrors the increases with decreases. The formula might look like this: 6, 12, 18, 24, 30, 36, work even 4 rounds, then 30, 24, 18, 12, 6.
Stuff the form firmly before the opening becomes too small. Continue decreasing until only 6-8 stitches remain, then cut your yarn and thread it through the remaining stitches to close.
Egg shapes use the same principle but with fewer even rounds between increases and decreases. Tube shapes for arms or legs require increases at one end, even rounds for length, then decreases at the other end. Your crochet hook size affects the tightness of the fabric—use a smaller hook than the yarn weight suggests to prevent stuffing from showing through gaps.
Tips for Even and Invisible Shaping
Achieving professional-looking shaping requires strategic stitch placement and consistent execution. The difference between amateur and polished work often comes down to how you space your changes, track your progress, and maintain tension throughout.
Evenly Spacing Increases and Decreases
The placement of your increases and decreases determines whether your fabric curves smoothly or develops visible corners. When working increases in the round, distribute them evenly by dividing your total stitch count by the number of increases needed. For example, if you have 24 stitches and need to add 6 increases, place one increase every 4 stitches.
Staggering your increases across rounds prevents vertical lines from forming. If Round 1 has increases at stitches 4, 8, 12, and 16, shift Round 2's increases to stitches 6, 10, 14, and 18. This offset creates a spiral effect rather than wedge-shaped sections.
For decreases, the same principle applies. Space them evenly around your work and avoid stacking them directly above previous decreases unless creating intentional angles. When shaping garment edges, place paired decreases several stitches in from the edge rather than at the very beginning or end of rows to create gradual slopes.
Using Stitch Markers Effectively
Stitch markers function as visual guides that eliminate counting errors and maintain symmetry. Place a marker at the beginning of each round to track your progress and prevent drifting when working in continuous spirals. This single marker shows exactly where each round starts and ends.
Mark the stitches where increases or decreases should occur before working them. Insert a marker directly into the stitch (not between stitches) where you'll make your change. For complex patterns with multiple shaping points, use different colored markers to distinguish between increase positions, decrease positions, and round beginnings.
When working flat pieces with paired shaping at both edges, place markers 3-5 stitches in from each side to mark your shaping zones. Work your decreases or increases consistently within these marked sections to create matching edges.
Maintaining Consistent Stitch Tension
Uneven tension makes increases bulge and decreases create gaps. Your working yarn should move smoothly through each stitch with the same resistance throughout your project. Increases naturally create slightly looser areas, so consciously tighten your grip on the working yarn when completing the second stitch in the same space.
For invisible decrease in single crochet, maintain firm tension when pulling through the front loops only. Insert your hook under the front loop of the first stitch, then the second, yarn over and pull through both front loops with controlled pressure. Loose tension at this step creates visible holes.
Check your gauge periodically when working long shaping sequences. If your stitches start looking larger or smaller than earlier rounds, your tension has shifted. Take a short break to reset your hand position and grip.
Common Crochet Abbreviations and Pattern Reading
Crochet patterns use standardized abbreviations to communicate increases and decreases efficiently. Recognizing these shorthand terms and understanding how they appear in written instructions helps you execute shaping techniques accurately.
Understanding Crochet Abbreviations
Basic stitch abbreviations form the foundation of pattern reading. You'll see ch for chain, sc for single crochet, hdc for half double crochet, and dc for double crochet in most patterns.
Decrease abbreviations combine the stitch type with a number. The most common ones include:
- sc2tog – single crochet two stitches together
- hdc2tog – half double crochet two stitches together
- dc2tog – double crochet two stitches together
The "tog" stands for "together" and indicates you're merging multiple stitches into one. The number tells you how many stitches to combine.
Increase abbreviations are simpler. Patterns typically write "2 sc in next st" or "inc" to show where you place multiple stitches in one space. Some designers use brackets like (2 sc) to clarify the instruction.
Reading Increase and Decrease Instructions
Pattern instructions place increases and decreases at specific points to create shaping. A line like "sc2tog, sc in next 4 sts, 2 sc in next st" tells you exactly where to decrease at the start and increase at the end.
Stitch counts appear in parentheses at row ends, like (24 sc). These numbers confirm you've executed increases and decreases correctly. If your count doesn't match, check where you placed your shaping stitches.
Asterisks and brackets indicate repeats. The instruction "*sc2tog, sc in next 3 sts; repeat from * around" means you repeat that decrease-and-stitch sequence continuously. This creates even shaping around circular projects like hats or amigurumi.
Many crochet tutorials demonstrate these abbreviations visually, which helps reinforce what the written shorthand means in practice.
Frequently Asked Questions
Understanding the mechanics of increasing and decreasing stitches helps you shape your crochet projects with precision and avoid common mistakes that can affect the appearance of your work.
A crochet increase adds stitches to your work by placing two or more stitches into a single stitch from the previous row or round, causing your fabric to expand. A decrease removes stitches by working two or more stitches together to form a single stitch, reducing the total stitch count and making your fabric contract.
You create a clean increase by working two complete stitches into the same stitch from the previous row. For single crochet, insert your hook into the designated stitch, yarn over and pull through, then yarn over and pull through both loops to complete the first stitch. Without moving to a new stitch, repeat this process in the same spot to create your second stitch.
The invisible decrease method creates the cleanest results by working through the front loops only of two stitches. Insert your hook under the front loop of the first stitch, then under the front loop of the second stitch so you have three loops on your hook. Yarn over and pull through the first two loops, then yarn over again and pull through the remaining two loops to complete the decrease.
To decrease double crochet stitches, yarn over and insert your hook into the first stitch, then yarn over and pull through. Yarn over again and pull through two loops, leaving two loops on your hook. Repeat this process in the next stitch until you have three loops remaining on your hook, then yarn over and pull through all three loops at once to join them into a single stitch.
You increase evenly by distributing your increases at regular intervals around your round rather than clustering them together. Calculate the spacing by dividing the total number of stitches by the number of increases needed, then work that many stitches between each increase. Staggering the placement of increases in subsequent rounds prevents visible lines from forming in your fabric.
You decrease evenly by spacing your decreases at consistent intervals throughout the round to maintain a balanced shape. Divide your total stitch count by the number of decreases required to determine how many stitches to work between each decrease. Offsetting the position of decreases in each round helps prevent ridges or distortions from appearing in your finished piece.
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