Calculators for yarn crafts and sewing
These calculators take the guesswork out of knitting, crochet, sewing, and quilting. They work out how much yarn or fabric a project needs, convert needle, hook, and fabric sizes between systems, and turn a gauge swatch into stitch and row counts, so you can start a project with confidence.
For sewing, there are calculators for skirts, sleeves, hems, pleats, ruffles, curtains, and pillows, along with yardage and shrinkage. For quilting, you will find tools for backing, batting, binding, borders, blocks, and the cutting sizes for common units such as half square triangles and flying geese. The knitting and crochet tools cover yardage, gauge, increases, and decreases.
Each calculator includes notes that explain how the result is worked out and what to watch for, so you can check the numbers against your own project. Measure carefully, use the same units throughout, and make a swatch before you commit to expensive yarn or fabric.
The results are estimates. Yarn, fabric, and tension vary, so buy a little extra, keep the labels and dye lot numbers, and wash a test piece before you cut or finish your project.
Not sure where to begin? Start with a yardage calculator for your project type, then use the gauge and size tools to check that the finished piece will fit.
⭐ Popular
Yarn Skein EstimatorTurn the yardage you need into the number of skeins to buy — the way you actually shop.Sock Yarn CalculatorPlan a pair of socks down to the yard. Pick a size and cuff height, choose your sock yarn weight, and get a per-pair yardage and skein estimate — plus a one-skein…Granny Square Yarn CalculatorPlan a granny square project end to end — enter your blanket size and square size to see how many squares you need, how much yarn it takes, and how to split that…Temperature Blanket CalculatorPlan your temperature blanket project — calculate total yarn, per-color skeins, and project timeline based on your local climate and blanket size.Amigurumi Yarn CalculatorPlan a whole amigurumi in one place — yarn, skeins, stuffing, safety-eye size, skill level and time. Worked tight in single crochet, the way plushies are made.Etsy Pricing CalculatorPrice your handmade listings so they actually turn a profit. Add up materials, your time, and overhead, set a profit margin, and this tool grosses the price up to…
🧶 Yarn & Knitting 48
Amigurumi Yarn CalculatorPlan a whole amigurumi in one place — yarn, skeins, stuffing, safety-eye size, skill level and time. Worked tight in single crochet, the way plushies are made.Aran Weight YarnAran is a touch heavier than worsted. It is warm and quick to knit, and its body makes cables and […]Beginner Crochet GuideCrochet uses a single hook and a handful of basic stitches. Master the chain and a couple of stitches and […]Beginner Knitting GuideKnitting comes down to a few core skills. Once you can cast on, knit, purl, and bind off, you can […]Blanket Yarn CalculatorPlan your blanket project with confidence — get your yarn estimate, cost range, and warmth rating in seconds.Bulky Weight YarnBulky yarn knits up fast on large needles, making it perfect for instant-gratification projects like chunky scarves and cozy throws. […]Choosing the Right YarnPicking yarn means matching fiber and weight to the project. The right choice makes a piece behave the way the […]Cotton Yarn GuideCotton yarn is a cool, durable, plant-based fiber. It behaves quite differently from wool, which makes it great for some […]Crochet Gauge CalculatorHome » Yarn & Fabric CalculatorsCALCULATOR Enter your crochet gauge and the finished size you want. The calculator returns the […]Crochet Hook Size ChartCrochet hooks are sized in millimeters, with US letter or number labels. This chart lines them up with the yarn […]Crochet Stitch CalculatorHome » Yarn & Fabric CalculatorsCALCULATOR Work out how many crochet stitches a project needs. Enter your gauge, the width […]Crochet Yarn CalculatorThe crochet planning calculator that goes beyond yardage — get yarn, time, hook size, and a full materials list for any project type.DK Weight YarnDK (double knitting) is a popular mid-weight yarn. It balances speed and detail, making it a go-to for sweaters, hats, […]Fingering Weight YarnFingering (also called sock weight) is a thin, versatile yarn. It is the backbone of hand-knit socks and detailed colorwork. […]Garment Yardage CalculatorPlan your garment project with confidence — get your fabric yardage, cost range, and sewing time estimate for any garment type.Gauge & Swatch CalculatorTurn your swatch into a gauge diagnosis - see whether you run tight or loose, how to fix it, and exactly how your gauge changes the finished size.Gauge FormulaGauge is how many stitches and rows fall in a set measure, usually 4 inches (10 cm). It is the […]Granny Square Yarn CalculatorPlan a granny square project end to end — enter your blanket size and square size to see how many squares you need, how much yarn it takes, and how to split that…Hat Yarn CalculatorFind out how much yarn you need for a knit or crochet hat – by style, size, and yarn weight – plus how many skeins to buy.How Much Yarn Do I NeedThe yarn a project needs depends on its size, the yarn weight, and the stitch pattern. These typical yardages get […]Knitting Decrease CalculatorHome » Yarn & Fabric CalculatorsCALCULATOR Shaping a sleeve or waist? Enter your current and target stitch counts to find […]Knitting Gauge CalculatorHome » Yarn & Fabric CalculatorsCALCULATOR Enter your knitting gauge and the size you want to make. The calculator gives […]Knitting Increase CalculatorHome » Yarn & Fabric CalculatorsCALCULATOR Need to add stitches evenly across a row? Enter your current and target stitch […]Knitting Yarn CalculatorEstimate how much yarn your next project needs — pick a project, choose your yarn weight and size, and get a yardage and skein estimate you can trust.Lace Weight YarnLace weight is the finest yarn, spun thin for delicate, airy fabric. It is the choice for heirloom shawls and […]Reading a PatternKnitting and crochet patterns use a compact shorthand. Once you know the conventions, the abbreviations and brackets become easy to […]Scarf Yarn CalculatorPlan your scarf from yarn to finished length. Pick a style to load typical dimensions and a suggested yarn weight, or set your own — then see yardage, skeins, and…Sewing and Fiber Arts GlossaryA quick reference to common terms across sewing, quilting, knitting, and crochet. Term Meaning Selvedge The finished, non-fraying lengthwise edge […]Sock Yarn CalculatorPlan a pair of socks down to the yard. Pick a size and cuff height, choose your sock yarn weight, and get a per-pair yardage and skein estimate — plus a one-skein…Sport Weight YarnSport weight sits between fingering and DK. It works up faster than fingering while keeping a light, refined fabric, ideal […]Super Bulky Weight YarnSuper bulky is thick and dramatic, working up incredibly fast on jumbo needles or even your arms. It is the […]Sweater Yarn CalculatorEstimate how much yarn your sweater needs — choose a garment type and size, pick your yarn weight, and get a yardage and skein estimate.Temperature Blanket CalculatorPlan your temperature blanket project — calculate total yarn, per-color skeins, and project timeline based on your local climate and blanket size.Understanding GaugeGauge is the number of stitches and rows in a set measure, usually 4 inches. It is the single most […]Wool Yarn GuideWool is the classic knitting fiber: warm, elastic, and forgiving. Its natural springiness makes it a joy to work with […]Worsted Weight YarnWorsted is the most popular and widely available yarn weight. It works up quickly, shows stitches clearly, and suits nearly […]Yarn Cost CalculatorWork out what a project really costs before you buy. Pick a project for typical yardage, enter your yarn price, and see the skeins, total spend, and cost per yard…Yarn Dye Lot EstimatorBuy the right amount of yarn from a single dye lot — the first time. Tell us your project and yardage, and get the number of skeins to buy from one lot, including a…Yarn Overbuy / Underbuy CalculatorBuy enough yarn to finish — without drowning in leftovers. Pick your project for a recommended safety buffer, then compare the safe buy against the bare minimum…Yarn Skein EstimatorTurn the yardage you need into the number of skeins to buy — the way you actually shop.Yarn Stash Planner & InventoryYour yarn stash, finally organized. Add each yarn by weight, amount, and cost to build a living inventory — then see its total value, a breakdown by weight, and a…Yarn Substitution Calculator & Comparison GuideSwapping the yarn a pattern calls for? Compare your substitute side by side — gauge, fibre, and yardage — and get a clear compatibility verdict plus a plain-English…Yarn Usage by Stitch CalculatorThe same project in a dense waffle stitch can eat far more yarn than in plain stockinette.Yarn Weight ChartYarn is graded by weight on a standard scale from 0 (lace) to 7 (jumbo). This chart maps each weight […]Yarn Weight Comparison ChartThis chart compares yarn weights side by side using wraps per inch (WPI) and typical yardage per 100 g, so […]Yarn WPI CalculatorFound a mystery skein with no label? Wraps per inch (WPI) tells you its weight.Yarn Yardage CalculatorConvert between grams of yarn and yards using the ball band.Yarn Yardage FormulaBall bands list a yarn yardage for a given weight. Use that ratio to convert grams of yarn into yards, […]
🧵 Fabric 35
Backing Fabric CalculatorBacking yardage for a project, piecing widths as needed.Binding Fabric CalculatorStraight-grain binding length and fabric for any edge.Canvas Fabric PropertiesCanvas is a heavy, tightly woven plain-weave fabric, usually cotton or a cotton blend, made for strength and structure. Property […]Cotton Fabric PropertiesCotton is a natural plant fiber and the workhorse of sewing and quilting, prized for being soft, breathable, and easy […]Curtain Fabric CalculatorFabric for gathered curtain panels at your chosen fullness.Denim Fabric PropertiesDenim is a sturdy cotton twill, traditionally dyed with indigo. It is tough, ages with character, and is a staple […]Fabric Bias Tape CalculatorHow much continuous bias tape a fabric square yields.Fabric Bolt Yield CalculatorCounts whole items only; allow extra for cutting layout.Fabric Care Symbols ChartThe little symbols on a fabric or garment label tell you how to wash, dry, and press it. This chart […]Fabric Cost CalculatorMultiply yardage by price; add tax and shipping separately.Fabric GSM ConverterConvert fabric weight between gsm and oz/yd\u00b2 in either direction.Fabric Panel Layout CalculatorSimple grid layout with no rotation; nesting odd shapes may fit more.Fabric Prewashing GuidePrewashing fabric before cutting prevents shrinkage and bleeding from ruining a finished project. It is a small step that saves […]Fabric Repeat CalculatorAdjust a cut length so a patterned fabric repeats line up.Fabric Shrinkage CalculatorHow much to buy so it still fits after pre-washing.Fabric Types ExplainedFabrics fall into a few big families. Knowing whether a cloth is woven or knit, and natural or synthetic, tells […]Fabric Weight CalculatorHome » Yarn & Fabric CalculatorsCALCULATOR Weigh a swatch of fabric and enter its size to find the fabric weight […]Fabric Weight ChartFabric weight, in GSM (grams per square meter), tells you how light or heavy a cloth is. This chart gives […]Fabric Weight FormulaFabric weight is given as GSM (grams per square meter) or ounces per square yard. It tells you how heavy […]Fabric Width ChartFabric comes in standard bolt widths that affect how much yardage a project needs. This chart lists the common ones. […]Fabric Yardage CalculatorFind how many yards of fabric you need to cut a set of same-size pieces, accounting for bolt width and waste.Fabric Yardage FormulaTo find how much fabric a set of pattern pieces needs, work out how many pieces fit across the fabric […]Fleece Fabric PropertiesFleece is a soft, napped polyester knit that is warm, lightweight, and beginner-friendly because it does not fray. Property Detail […]Gather Ratio CalculatorFind the gather ratio between flat and finished lengths.How Much Fabric Do I NeedFabric yardage depends on the pattern pieces, the fabric width, and your size. These rough amounts help you shop before […]Linen Fabric PropertiesLinen is made from the flax plant. It is strong, cool to wear, and develops a relaxed, lived-in look as […]Pillow Fabric CalculatorCovers front and back with seam and overlap. For very large pillows check against your fabric width.Pleat CalculatorKnife and box pleats typically need about 3\u00d7 the finished width in fabric.Polyester Fabric PropertiesPolyester is a synthetic fiber valued for durability, wrinkle resistance, and holding color and shape, though it breathes less than […]Rayon Fabric PropertiesRayon (viscose) is a semi-synthetic fiber made from processed cellulose. It drapes beautifully and feels soft, but needs gentle care. […]Ruffle CalculatorFuller ruffles use 2.5\u20133\u00d7; soft gathers around 1.5\u20132\u00d7.Silk Fabric PropertiesSilk is a natural protein fiber spun by silkworms. It is lustrous, surprisingly strong, and luxurious, but demands careful handling. […]Tablecloth Fabric CalculatorFabric for a tablecloth with drop on every side.Upholstery Fabric CalculatorRough yardage to reupholster, by surface area.Wool Fabric PropertiesWool is a natural protein fiber from sheep. It is warm, resilient, and naturally insulating even when damp, but it […]
🧩 Quilting 18
Backing FormulaQuilt backing must be larger than the top, with a few inches of overhang on every side for longarm quilting. […]Batting Thickness ChartBatting is the filling between a quilt top and backing. Its loft (thickness) and fiber affect warmth, drape, and how […]Blanket Size ChartWhether you are knitting, crocheting, or quilting a blanket, these standard finished sizes are a useful starting point. Blanket type […]Charm Pack CalculatorHow many 5\u2033 charm squares and packs to cover a quilt top.Flying Geese CalculatorNo-waste cutting sizes for flying geese units.Half-Square Triangle CalculatorCutting sizes to make half-square triangles (HST) at a finished size.Jelly Roll Strip CalculatorEstimate how many 2.5\u2033 strips (and jelly rolls) a quilt top needs.Quilt Backing CalculatorWork out how much backing fabric a quilt needs — including overhang for quilting — and the most economical seam direction.Quilt Batting CalculatorBatting size and area for your quilt top, with overhang.Quilt Binding CalculatorBinding length and fabric for the edge of your quilt.Quilt Binding FormulaBinding wraps the raw edges of a quilt. To size it, find the perimeter, add overlap for joining and corners, […]Quilt Block CalculatorAssumes no sashing between blocks. Add sashing width to the block size to plan for it.Quilt Border CalculatorFabric needed for a border around your quilt top.Quilt Fabric CalculatorYardage to make a whole-cloth quilt top of a given size.Quilt Fabric Waste CalculatorAdd a waste allowance to the yardage a pattern calls for.Quilt Piece Count CalculatorTotal patches needed to fill a quilt top. Quilt width (in) Quilt height (in) Finished piece size (in) Calculate RoundsQuilt Size CalculatorFind finished quilt dimensions from your mattress size, drop and pillow tuck.Quilting Basics GuideA quilt is three layers stitched together: a decorative top, a layer of batting, and a backing. Understanding that structure […]
🪡 Sewing 15
Beginner Sewing GuideSewing looks intimidating, but a handful of basics will get you making real projects fast. Here is what you need […]Bias Binding CalculatorSize of fabric square to cut for continuous bias binding.Bias Tape FormulaBias tape is cut diagonally so it stretches around curves. A square of fabric yields a surprising length of continuous […]Button Spacing CalculatorPlaces the first and last buttons at the ends with equal gaps between.Circle Skirt CalculatorWaist cut-out radius and fabric for a circle skirt.Elastic Length CalculatorLower % = tighter. Waistbands are often 90\u201395% of the body measurement.Gathered Skirt CalculatorFuller skirts use 2\u20133\u00d7 the waist. Add length + waistband + hem separately.Hem Allowance CalculatorDouble-fold hems turn under twice, adding twice the hem depth to the cut.Pattern Scaling CalculatorScale every measurement by the same percentage to keep proportions.Seam Allowance CalculatorFind the cut size needed for a finished measurement plus seams.Sleeve Ease CalculatorSleeve width from your bicep plus wearing ease.Thread Usage CalculatorA lockstitch uses roughly 3\u00d7 the seam length in thread (needle + bobbin combined).Thread Weight ChartThread weight (wt) describes how fine or heavy a thread is. Confusingly, a higher number means a finer thread. This […]Thread Weight Comparison ChartThread is measured in several systems. This chart compares the common weight (wt) numbers with the Tex system and typical […]Zipper Length CalculatorStandard zippers come in set lengths; the next size up can be shortened.
📏 Conversions 12
CM to Inches CalculatorConvert centimeters to inches. Centimeters Convert in 1 cm = 0.3937 inches.Crochet Hook Comparison ChartCrochet hooks carry US letter and number labels alongside metric sizes, plus an older UK system. This chart compares all […]Fabric Width Conversion CalculatorA pattern calls for yardage at one fabric width \u2014 find how much you need at a different width.GSM to oz/yd\u00b2 CalculatorConvert fabric weight from grams per square metre to ounces per square yard.Hook Size Conversion CalculatorConvert US crochet hook letter sizes to millimetres.Inches to CM CalculatorConvert inches to centimeters. Inches Convert cm 1 inch = 2.54 cm exactly.Meters to Yards CalculatorConvert meters to yards. Meters Convert yd 1 m = 1.0936 yards.Needle Size Comparison ChartKnitting needles are labeled differently in the US, metric, and old UK systems. This chart lines the three up so […]Needle Size Conversion CalculatorConvert US knitting needle sizes to millimetres.Ounces to Grams CalculatorConvert ounces (yarn/fiber weight) to grams. Ounces Convert g 1 oz = 28.35 g.Yards to Meters CalculatorConvert yards of fabric or yarn to meters. Yards Convert m 1 yard = 0.9144 m exactly.Yarn Weight Conversion CalculatorLook up the standard yarn-weight category, ply and typical gauge.
💰 Project Planning & Pricing 9
Cost Per Yard FormulaCost per yard turns a bulk price into a per-unit figure so you can compare fabrics or price a project […]Craft Fair Pricing CalculatorPrice for a craft fair without eating your booth fee. Enter your per-item costs, the table fee, and how many pieces you expect to sell — you will get a suggested…Etsy Pricing CalculatorPrice your handmade listings so they actually turn a profit. Add up materials, your time, and overhead, set a profit margin, and this tool grosses the price up to…Inventory CalculatorKnow what your stock is worth and when to restock. Enter how many units you hold, what they cost and sell for, and how fast they move — you will see your inventory…Material Waste CalculatorWaste amount and percentage from what you bought versus used.Pattern Difficulty EstimatorGauge a pattern\u2019s difficulty from a few factors.Profit Margin CalculatorSee exactly what you earn on each sale. Enter your price and your true cost to get profit, margin, and markup at a glance — then use a target margin to find the…Shipping Cost EstimatorA rough estimate \u2014 carriers also price by box size and distance.Time to Finish EstimatorFind out when your project will actually be done. Pick a project for a typical time estimate, set how many hours a week you really craft, and see the weeks to…