Free Knitting Calculators & Tools

Last updated: March 16, 2026

Knitting is precision craft — every stitch count, needle size, and yardage estimate matters. These free calculators take the guesswork out of your projects, from cast-on to bind-off. Plan sweaters, socks, hats, and blankets with accurate math and no signup required.

Knitting Garment and Construction Calculators

Cast-on counts, hat crowns, sock construction, sleeve shaping, and raglan yoke math — everything you need for fitted knitting.

🧷Knitting

Cast On Calc

Calculate exactly how many stitches to cast on for any width, with optional stitch pattern multiple rounding and edge stitch notes.

🧢Knitting & Crochet

Hat Calculator

Get cast-on count, crown decrease schedule, and yardage for any head size from preemie to large adult with ease adjustments.

🧦Knitting

Sock Calculator

Calculate sock stitch counts for top-down or toe-up construction with heel flap, gusset, and short-row heel instructions.

💪Knitting & Crochet

Sleeve Calculator

Get row-by-row decrease instructions for tapered sleeves in knit or crochet, with evenly distributed shaping.

👕Knitting & Crochet

Raglan Calculator

Calculate neck cast-on, stitch distribution, and increase rounds for a standard top-down raglan sweater.

Project Planning and Finishing Tools

Blanket sizing, stripe patterns, blocking methods, stash yardage estimation, and project costing.

↕️Knitting & Crochet

Inc/Dec Calculator

Get stitch-by-stitch instructions for distributing increases or decreases evenly across a row or round.

🛏️Knitting & Crochet

Blanket Calculator

Find the right stitch count, row count, and yarn yardage for any blanket size from baby to king.

📌Knitting & Crochet

Blocking Calc

Get the right blocking method for your fiber type, with stretch feasibility ratings and step-by-step instructions.

🗄️Knitting & Crochet

Stash Estimator

Estimate remaining yardage in partial skeins by weight, plus a yardage reference table for unlabeled yarn by weight category.

💰Knitting & Crochet

Cost Calculator

Calculate the total cost of your project, including yarn, notions, and an estimate of your time.

🌈Knitting & Crochet

Stripe Generator

Generate random or structured stripe patterns with per-color yardage estimates for stash-busting projects.

Reference and Essential Knitting Tools

Yarn estimation, gauge calculation, needle conversion, WPI identification, and stitch abbreviations — the tools you need on every project.

🧶Knitting & Crochet

Yarn Calculator

Calculate exactly how much yarn you need for any project — blankets, sweaters, scarves, and more.

📐Knitting & Crochet

Gauge Calculator

Calculate your gauge from a swatch, resize patterns to a new gauge, and get exact stitch counts.

🪡Knitting & Crochet

Needle Converter

Instantly convert knitting needle and crochet hook sizes between US, UK, metric, and Japanese systems.

⚖️Knitting & Crochet

Yarn Weights

Interactive yarn weight chart with US, UK, and Australian names — plus a substitution compatibility checker.

🔢Knitting & Crochet

Stitch Counter

Free online stitch counter with multiple counters, row reminders, and offline support. No login needed.

📏Knitting & Crochet

WPI Calculator

Enter your wraps per inch and instantly identify yarn weight, recommended needles and hooks, gauge range, and suggested projects.

📖Knitting & Crochet

Abbreviations

Searchable glossary of knitting and crochet abbreviations with US/UK toggle, stitch descriptions, and step-by-step diagrams.

Also a crocheter? See our Crochet Calculators →