What Changes When You Convert Between Crafts?
Knitting and crochet create structurally different fabrics. Knit stockinette is thin, smooth, and drapey. Crochet single crochet is thicker, stiffer, and about 30% heavier per square inch. That means you can't just replace "knit" with "single crochet" and expect the same garment.
Fabric thickness. A crochet fabric is roughly 1.5 to 2 times as thick as a knit fabric in the same yarn. Crochet garments have more structure. Knit garments have more drape.
Stitch height. Knit rows are short, about 0.15 inches per row in worsted stockinette. Crochet rows are taller, single crochet runs about 0.3 inches, half double crochet about 0.5 inches, and double crochet about 0.75 inches per row.
Yarn consumption. Crochet uses approximately 25-35% more yarn than knitting for the same finished dimensions. A knit sweater needing 1,200 yards will need 1,500-1,600 yards in crochet. Budget accordingly.
Stitch count. Knitting typically produces more stitches per inch than crochet in the same yarn weight. Worsted stockinette runs about 18 stitches per 4 inches. Worsted single crochet runs about 14-16 stitches per 4 inches.
How Do You Convert a Pattern Step by Step?
Step 1: Swatch in Both Crafts
Make a 6-inch gauge swatch in the original craft's stitch pattern, and another 6-inch swatch in the crochet (or knit) stitch you plan to substitute. Block both. Measure stitches per inch and rows per inch for each.
Example: Your knitting swatch measures 4.5 stitches per inch in stockinette. Your crochet swatch measures 3.5 stitches per inch in single crochet. That gives you a conversion ratio of 3.5 / 4.5 = 0.78.
Step 2: Calculate the Stitch Conversion Ratio
Divide your new craft's gauge by the original pattern's gauge.
If the pattern says "cast on 80 stitches" for a 20-inch-wide front panel at 4 stitches per inch, and your crochet gauge is 3.5 stitches per inch, your new chain is: 20 inches x 3.5 stitches = 70 stitches.
Step 3: Calculate the Row Conversion Ratio
Do the same with row gauge. If the pattern says "work 120 rows for 18 inches" at 6.7 rows per inch, and your crochet produces 4 rows per inch, your new row count is: 18 inches x 4 rows = 72 rows.
Step 4: Adjust Shaping
Recalculate any increases, decreases, or armhole shaping based on your new stitch and row counts. This is where the Gauge Calculator becomes essential, enter both gauges and the tool shows you how stitch counts translate.
Step 5: Recalculate Yarn
Multiply the original yarn estimate by 1.25-1.35 if converting from knit to crochet. Divide by 1.25-1.35 if going the other direction.
How Does the FiberTools Gauge Calculator Help?
The Gauge Calculator handles the math of conversion. Enter your original pattern gauge and your actual swatch gauge in the new craft, and the tool shows you:
- How many stitches to cast on or chain for any given width - How many rows to work for any given length - How far off your dimensions will be if you don't adjust
You can also use the Stitch Counter to track your progress as you work the converted pattern, especially useful when row counts change and you need to hit shaping milestones at different row numbers than the original pattern.
What Are the Stitch Equivalencies?
Not all stitch substitutions work equally well. Here's a guide for matching knit stitch patterns to crochet equivalents:
Stockinette: Best crochet substitute is half double crochet (hdc). Closest in drape and thickness. Garter stitch: Best substitute is single crochet (sc). Both produce a dense, textured fabric. Ribbing (k1p1): Front post / back post dc. Creates elastic, ribbed texture. Seed stitch: Linen stitch or moss stitch. Textured, reversible. Cables: Crochet cables (FP stitches). Possible but uses much more yarn. Lace: Crochet mesh or filet. Different aesthetic but similar openness.
Half double crochet is the best general-purpose substitute for stockinette. It produces a fabric with similar weight and drape, and its gauge is closer to knit stockinette than single crochet (which is denser) or double crochet (which is more open).
Worsted weight stockinette at 18 stitches/4 inches converts roughly to hdc at 14-15 stitches/4 inches. Always swatch to confirm your specific numbers.
What Are the Common Mistakes and Limitations?
Not all patterns convert well. Complex colorwork like Fair Isle uses stranded yarn behind the fabric, a technique that doesn't translate to crochet. Crochet colorwork (tapestry crochet) exists but creates a much thicker, stiffer fabric.
Cables convert but get bulky. Crochet cables using front post stitches are thicker than knit cables and use roughly 40% more yarn. They're beautiful but heavy. Consider using DK weight yarn for a crochet cable project when the knit pattern calls for worsted.
Don't forget about edge differences. Crochet edges are naturally cleaner than knit edges. If the knit pattern includes picked-up stitches for a collar or border, you may be able to skip that step in crochet and simply work directly along the edge.
Yarn weight matters more than you think. Going down one yarn weight in crochet (using DK instead of worsted) can produce a fabric closer to the original knit's drape and weight. Swatch both and compare hand-feel before committing to a full project.
Row gauge is harder to match than stitch gauge. Most conversion issues show up in the length, not the width. If your row gauge doesn't match, adjust by working to measurements rather than row counts, "work until piece measures 14 inches" instead of "work 96 rows."
What Do Real Conversions Look Like?
Knit scarf to crochet. A knitter's garter stitch scarf pattern called for 40 stitches on US 8 needles in worsted weight, worked for 60 inches. The crocheter substituted single crochet on an I/9 hook, chained 32 stitches (matching the 8-inch width at her gauge), and worked to 60 inches. She used 380 yards, about 30% more than the knit version's 290 yards.
Crochet blanket to knit. A crochet granny square blanket used 2,400 yards of worsted. The knitter converted to a mitered square blanket in stockinette, maintaining the same finished dimensions. Her version used 1,800 yards, 25% less yarn. The knit version draped more softly but needed blocking to lie flat.
Knit baby cardigan to crochet. A crocheter adapted a top-down raglan knit cardigan. She substituted hdc for stockinette, recalculated stitch counts using the Gauge Calculator, and adjusted increases to occur every other row instead of every row (because crochet rows are taller). The finished cardigan matched the original's dimensions within half an inch.
Frequently Asked Questions
Does crochet really use 30% more yarn than knitting?
Yes, roughly 25-35% more depending on the stitch. Crochet stitches wrap the yarn more times around the hook than knitting wraps around the needle. Single crochet uses about 25% more than stockinette. Double crochet uses about 35% more. Half double crochet falls in between at about 30%.
Can I convert any knitting pattern to crochet?
Simple patterns, scarves, blankets, basic sweater shapes, convert well. Patterns with complex techniques like short rows, stranded colorwork, or intricate lace are much harder. The basic shape and proportions convert. The specific construction techniques don't always have crochet equivalents.
Should I use the same yarn weight when converting?
Not always. Crochet fabric is thicker than knit fabric in the same yarn, so going down one weight (DK instead of worsted) can produce a more similar fabric feel. Swatch in both the original and one-step-lighter weight, then pick the fabric that matches the drape you want.
How do I convert shaping instructions?
Recalculate all increases and decreases based on your new gauge. If the pattern says "decrease 1 stitch every 6 rows," figure out how many inches that covers in the original gauge, then calculate how many rows that equals in your new gauge. The Gauge Calculator handles this conversion math for you.
Start Converting with Confidence
You don't have to limit yourself to patterns in your craft. With a gauge swatch, a conversion ratio, and a little patience, that gorgeous knitting pattern can become your next crochet project, or the other way around.
Start by swatching and plugging your numbers into the Gauge Calculator. It'll show you exactly how your stitches and rows translate, so you can plan your conversion before you commit a single yard of yarn.