Craft math, done for you

Choose your craft

Quilting

Backing, batting, binding and border yardage worked out for you.

7 tools

Crochet

Blanket yarn, granny squares and hat sizing with real numbers.

9 tools

Knitting

Even increases and decreases across a row, plus needle sizes.

6 tools

Needlepoint

Canvas size by mesh count, with margins for finishing.

3 tools

All calculators

• Quilt Fabric Calculator Backing, batting, binding and borders in one go.
• Fabric Yardage Calculator Yards or fat quarters to cut any number of pieces.
• HST & Flying Geese Calculator Cut sizes and yardage for half-square triangles and flying geese.
• Quilt Backing Calculator Panels, seam direction and backing yardage.
• Binding Calculator Binding length, strips to cut and yardage, plus bias.
• Blanket Yarn Calculator Yards and skeins for any blanket, border included.
• Granny Square Calculator Squares needed, finished size and a color layout.
• Temperature Blanket Planner Color ranges, yarn and a free printable year tracker.
• Crochet Hat Size Chart & Calculator Stitch counts and crown rounds for any head size.
• C2C Crochet Calculator Blocks, diagonal rows and yarn for a corner to corner blanket.
• Increase & Decrease Evenly Calculator Spread increases or decreases evenly across a row.
• Knitting Gauge Calculator Convert a pattern's stitch and row counts to your gauge.
• Needlepoint Canvas Size Calculator Finished size and canvas to buy for any mesh.
• Quilt Sashing Calculator Quilt size from blocks, sashing and borders.
• On-Point Setting Calculator Setting and corner triangle sizes for on-point quilts.
• Foundation Chain Calculator How many chains to make for any width and stitch.
• Crochet Ball Pattern Calculator Round-by-round sphere pattern for any size ball.
• Knitting & Crochet Row Counter Tap counter with repeats, targets and saved projects.
• Grams to Yards Yarn Converter Grams, yards and meters from your yarn label.
• Long-Tail Cast-On Calculator Stitches for any width, plus long-tail length.
• Top-Down Raglan Sweater Calculator Neck, raglan, body and sleeve counts from your chest size.
• Sock Calculator Cast-on, heel flap, gusset and toe counts.
• Yarn Substitution Calculator Balls of a new yarn, with a thickness check.
• Cross Stitch Floss Calculator Skeins of floss per color from your stitch counts.
• Cross Stitch Fabric Calculator Design size on Aida, evenweave and linen, any count.

Guides

• How to measure gauge in knitting and crochet Make a swatch, count stitches and rows, and fix a gauge that doesn't match.
• Increasing evenly: the math explained, with examples The arithmetic behind "increase 12 stitches evenly", worked out by hand.
• Yarn weights explained: from lace to jumbo What the numbers 0 to 7 on a yarn label mean and how to substitute yarn.
• How to estimate yarn for a blanket from a swatch Turn a small swatch into yards for any blanket, with borders and bed sizes.
• Crochet hat sizes: how to make a hat that fits Head sizes, negative ease and when to stop increasing the crown.
• How to make a temperature blanket: rows, colors and ranges Choose rows or squares, set color ranges from real weather data and estimate yarn.
• How to piece a quilt back: seams, overage and wide backing Where the seams go, how much extra to leave and when wide backing saves a seam.
• Half-square triangles: which method to use Two, four or eight at a time compared: cut sizes, fabric use and accuracy.
• Knitting ease explained: how much ease for sweaters, hats and socks Positive and negative ease, with the numbers for common garments.
• Elizabeth Zimmermann's percentage system explained How EPS turns one chest measurement into a whole sweater.
• How to measure feet for hand-knit socks Foot circumference, length and the ease that makes socks stay up.
• How to substitute yarn in a knitting or crochet pattern Match weight, gauge and fiber, then work out how much to buy.
• Turning chains explained: when they count as a stitch Turning chain lengths for each stitch and how they change your counts.
• How to crochet in the round: increases that lie flat Magic ring, increase rounds and why 6, 8 and 12 stitch starts differ.
• How to crochet C2C: increase, straight and decrease rows The three phases of corner to corner and how to follow a graph.
• How to count rows in knitting and crochet Reading rows in the fabric and keeping track of repeats.
• How to bind a quilt: strips, joins and mitered corners Cutting, joining and attaching double-fold binding.
• How to add sashing and cornerstones to a quilt Sashing widths, cutting sizes and how they change the quilt size.
• How to set quilt blocks on point Setting and corner triangles, and keeping the edges straight.
• Choosing cross-stitch fabric: Aida, evenweave or linen How each fabric works, stitching over one or two, and picking a count.
• Cross stitch vs needlepoint: what's the difference? Fabric or canvas, floss or wool, and how much of the surface each one covers.
• Needlepoint stitches: tent, continental and basketweave The three ways to work a tent stitch and which one suits each part of a canvas.
• How to cross stitch: a beginner's guide Reading the chart, starting a thread, strands, needle sizes and your first row.
• How to frame cross stitch: washing, pressing and mounting Wash and press the finished piece, mount it on board and keep the glass off the stitches.
• Backstitch in cross stitch: outlines, lettering and French knots Reading backstitch on a chart, working it neatly, and making French knots that stay put.
• Needlepoint canvas types: mono, interlock, Penelope and mesh sizes How each canvas is woven, what mesh means and which canvas suits your project.
• Fat quarter size: dimensions, cuts and how many you need 18 x 22 inches, squares and strips per fat quarter, long quarters, fat eighths and quilt counts.
• How to bind off knitting: basic, stretchy and three-needle The basic bind-off, binding off in rib, stretchy cuffs and socks, and shoulder seams.
• How to cast on knitting: long-tail, knitted, cable and backward loop The main cast-on methods, when to use each, the long-tail step by step and how many stitches.
• How to join granny squares: seams, order and blanket size Slip stitch, whip stitch, mattress stitch and join-as-you-go compared, plus joining order and how seams change the size.
• Kitchener stitch: how to graft a sock toe, step by step Setup, the knit off, purl on rhythm, even tension, fixing mistakes and tail length.
• Crochet abbreviations: US and UK terms with a full list The standard US abbreviations, US and UK stitch names side by side, and pattern symbols.
• Crochet border for blanket: easy styles, corners and stitch counts Easy border styles, 3 stitch corners, stitches per row end, fixing ruffles and how much yarn a border adds.
• How to read a crochet pattern: repeats, brackets and stitch counts The parts of a pattern, what *, [ ] and ( ) mean, charts, and a real hat crown decoded.
• How to wash a quilt: machine, hand, drying and shrinkage Cold water, mild detergent, color catchers, drying, old quilts, storage and how much each quilt size shrinks.
• How to block knitting and crochet: wet, steam and spray methods Wet, spray and steam blocking, which suits wool, cotton and acrylic, plus lace, granny squares and swatches.
• How to change colors in crochet: rows, rounds and ends Row ends, mid-row and round changes, carrying yarn and weaving in ends.
• How to crochet a blanket: a beginner's guide from chain to border Yarn and hook, size, the foundation chain, first row, straight edges, easy stitches, joining yarn and finishing.
• How to hand quilt: needles, the rocking stitch and stitches per inch Betweens needles, thread, thimble and hoop, basting, marking, the rocking stitch, hidden knots and big-stitch quilting.
• How to pick up stitches in knitting: edges, necklines and sock gussets Bound-off and side edges, the 3 for 4 ratio, necklines, even spacing, holes and sock heel gussets.
• How to join yarn: adding a new ball in knitting and crochet Row end or mid-row, the magic knot, Russian join, spit splice and overlap, weaving in ends, and how many joins a blanket needs.
• How to knit a hat: a beginner beanie in the round Yarn and needles, head sizes, cast-on counts for every size, ribbing, crown decreases and finishing.
• How to knit socks: a beginner's cuff-down guide Yarn and needles, cuff, leg, heel flap, heel turn, gusset, foot, toe and graft, with full counts for three foot sizes.
• How to make a quilt: a beginner's guide from cutting to binding Pattern and size, prewashing, cutting, the 1/4 inch seam, pressing, rows, borders, basting, quilting and binding, with fabric for every size.
• Knit vs crochet: the differences and which to learn first Needles or hook, live stitches, fabric, real yarn use numbers, speed, mistakes, cost and where to start.
• Types of yarn: fibers, construction and how to read a label Wool, alpaca, silk, cotton, linen, bamboo and acrylic compared, plus plied, chenille and boucle yarn and yarn labels.

Free printables

• Printable quilt planner Plan size, blocks, fabrics and cutting on one page, with graph paper for sketching.
• Printable yarn shopping list Take yarn names, weights, dye lots and skein counts to the store.
• Printable knitting and crochet project sheet Record the pattern, gauge, needle or hook size, changes and dates for any project.
• Printable row tracker Cross off rows 1 to 200 and track repeats with a pencil.

Reference charts

• Yarn Weight Chart Weights 0 to 7 with gauge, needle and hook sizes.
• Crochet Hook Size Chart Millimeter, US letter and UK sizes side by side.
• Knitting Needle Size Chart Metric, US and old UK needle sizes.
• Blanket Size Chart Common crochet and knit blanket sizes, lovey to king.
• Quilt Size Chart Quilt sizes for every bed, with a mattress size calculator.