31 free tools — no login required

Free tools for every fiber crafter

Last updated: March 16, 2026

Yarn calculators, needle converters, gauge tools, and more — for knitting, crochet, weaving, spinning, and embroidery. No login. No ads wall. Works offline.

Browse All Tools 🧶 Yarn Calculator

⚡Instant results📱Mobile-first🔒100% private📴Works offline🆓Always free

Essential Fiber Arts Tools

Yarn Calculator

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

🪡Knitting & Crochet

Needle Converter

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

📐Knitting & Crochet

Gauge Calculator

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

⚖️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.

More Fiber Arts Calculators

🛏️Knitting & Crochet

Blanket Calculator

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

↕️Knitting & Crochet

Inc/Dec Calculator

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

🌈Knitting & Crochet

Stripe Generator

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

📖Knitting & Crochet

Abbreviations

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

🌀Spinning

Spinning Calculator

Calculate drive ratios, twists per inch, and plying ratios for handspinning — the only online tool for spinners.

🧮Knitting & Crochet

Stitch Calculator

Find compatible stitch counts for sampler blankets. Combine multiples, browse 50+ stitches, and plan rows.

🃏Knitting & Crochet

Stitch Reference

Visual step-by-step for every basic stitch. Yarn overs, pull-throughs, loop counts, and turning chains at a glance.

🇬🇧Crochet

UK/US Converter

Instantly convert UK crochet patterns to US terminology and vice versa. Handles abbreviations, vintage terms, and full stitch names.

⭕Crochet

Circle Calculator

Generate a flat circle crochet pattern for any stitch type with staggered increases. Enter your stitch and rounds to get the full pattern.

🪡Knitting & Crochet

Needle Guide

Visual guide to needle types: tapestry, chenille, embroidery, sharps, beading, and more. Know which needle to use for every project.

🧸Crochet

Amigurumi Shapes

Basic crochet shapes for amigurumi: sphere, cone, cylinder, and oval. Get round-by-round instructions for each shape.

📏Knitting & Crochet

WPI Calculator

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

🔷Crochet

C2C Calculator

Plan your corner-to-corner crochet blanket with exact block counts, diagonal rows, and yardage estimates from your gauge swatch.

🧷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.

🟩Crochet

Granny Planner

Plan a granny square blanket with grid layout, total squares, per-color yardage, and joining yarn estimates.

💪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.

📌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.

Specialty Fiber Arts Tools

✂️Cross Stitch

Cross Stitch Calc

Calculate finished dimensions for any fabric count and estimate thread amounts per color.

🏗️Weaving

Sett Calculator

Find the right sett (EPI) for your yarn and weave structure, plus warp length and reed substitution.

💰Knitting & Crochet

Cost Calculator

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

🎨Knitting & Crochet

Color Pooling

Calculate the exact stitch count to make variegated yarn pool into argyle and plaid patterns.

🧵Embroidery

Thread Converter

Instantly convert between DMC, Anchor, Cosmo, and Sulky embroidery thread numbers.

Buying Guides

🪝

Best Crochet Hooks

Top-rated hooks for every skill level and budget.

🥢

Best Knitting Needles

Find the perfect needles for your next project.

🧸

Best Yarn for Amigurumi

Yarns that hold shape and show stitch definition.

🌱

Best Yarn for Beginners

Forgiving, easy-to-work yarns for new crafters.

🛏️

Best Yarn for Blankets

Soft, durable yarns perfect for cozy blankets.

Fiber Arts Guides & Tutorials

View all →

🧶

How Much Yarn Do I Need? The Complete Guide to Calculating Yarn for Any Project

Learn how to calculate exactly how much yarn you need for blankets, sweaters, scarves, and more. Includes yardage charts by project type and yarn weight.

🪡

Knitting Needle & Crochet Hook Size Chart — US, Metric, UK & Japanese Sizes

The complete knitting needle and crochet hook size conversion chart. Convert between US, metric (mm), UK, and Japanese sizing systems instantly.

📐

How to Calculate and Adjust Gauge in Knitting and Crochet

Learn why gauge matters, how to measure it accurately, and how to resize patterns when your gauge doesn't match. Step-by-step guide with examples.

🧶

The Complete Guide to Reading Yarn Labels (What Every Number Means)

Learn how to read yarn labels like a pro! This comprehensive guide explains yarn weight symbols, washing care instructions, gauge information, and what every number on your yarn label actually means.

📐

Knitting Gauge: Why It Matters and How to Get It Right

Learn what knitting gauge is, how to make and block a proper gauge swatch, and what to do when your tension doesn't match the pattern. Covers stitch gauge, row gauge, and resizing.

🛏️

How Much Yarn Do You Need for a Blanket?

Figure out exactly how much yarn to buy for any blanket size. Covers yardage by blanket type, how yarn weight and stitch pattern affect totals, and when to use a calculator.

Why crafters love FiberTools

🚀

Lightning fast

Every calculation happens instantly in your browser. No waiting for servers.

📴

Works offline

Use it at the yarn shop, on the couch, or at a craft fair — no signal needed.

📱

Built for your phone

Big buttons, one-thumb operation. Designed for crafters with yarn in hand.

🔓

No login, ever

Just use the tools. No accounts, no subscriptions, no email required.