Every stitch planned.
Every project predictable.
14 free crochet calculators and 33 in-depth reference articles, built on Craft Yarn Council standards. Yarn yardage, gauge, hat size, blanket size, stripe generator — all in your browser, with zero tracking.
14 calculators
Pick the right tool for the project.
Every calculator runs entirely on your device. Enter your gauge swatch, your project dimensions, and your yarn — get exact stitch counts, yardage, and skein totals in milliseconds.
Yarn Yardage
Exact yards, meters, and skeins for any project — with 10% buffer for tension and dye-lot insurance.
Gauge Swatch
Compare your gauge to a pattern's stated gauge. Adjust hook size or stitch count for a perfect fit.
Hat Size
Crown diameter, exact stitches per round, hat height, yardage — preemie to adult XL with four fits.
Hook Size Converter
Convert between mm, US letter, UK, and vintage hook size systems. Auto-detect from input.
Stitch Count Calculator
Calculate stitches needed for any width and height based on your gauge.
Blanket Size
Standard blanket dimensions from lovey to king. Yardage for every weight.
Pricing Calculator
Cost + labour + overhead = sustainable retail and wholesale prices for handmade items.
Granny Square
Square count for any blanket size. Yardage per square. Layout planning.
Project Time
How long will this project take? Based on your stitches-per-minute and total stitches.
Yarn Weight Converter
CYC 0-7 to international names. WPI, gauge ranges, hook sizes.
Flat Circle
Increase pattern for any flat circle in sc, hdc, dc. Doily, mandala, hat crown.
Increase & Decrease
Distribute increases or decreases evenly across any row with one click.
C2C Blanket
Tile count, finished size, yardage for corner-to-corner blankets and graphghans.
Stripe Generator
Visual stripe planner with palette presets, randomize, and Pinterest-ready downloads.
Live tools
Solving the problems calculators alone can't.
Persistent in-browser tools that save your work locally. No account required.
How it works
Three steps. Every project.
Make a 4×4 gauge swatch
In your chosen yarn and hook. Count stitches and rows. This is the single most reliable input you can give.
Pick a calculator
Yarn yardage for total yards. Blanket size for dimensions. Hat size for fit. Pricing for selling. 14 to choose from.
Plan with confidence
Get exact numbers and a ready-to-follow pattern. Save the print view or copy into your notes app.
33 articles
Reference, written from experience.
In-depth guides on every aspect of crochet — yarn fibres, hooks, gauge, stitches, joining, blocking, business. Each article pairs with a relevant calculator.
FAQ
Direct answers.
Are these crochet calculators really free?
Yes — every calculator and article is 100% free. No signup, no ads, no paywall, no upselling. The site runs entirely on your device; nothing is sent to any server.
Do I need to create an account?
No. All calculators run as plain JavaScript in your browser. No account, no login, no tracking. The Stitch Counter tool uses your browser's local storage to remember your projects, but that data never leaves your device.
Will these calculators work on my phone?
Yes — every calculator is mobile-friendly and responsive. The site loads fast even on slower connections because there are no heavy frameworks, no images larger than necessary, and no third-party trackers. Add the homepage to your phone's home screen for one-tap access.
What's the difference between this and other crochet calculator sites?
Three things: (1) precision math built on Craft Yarn Council standards rather than rules of thumb, (2) every calculator paired with an in-depth reference article that explains the formula, (3) absolute privacy — your gauge swatch numbers and project plans never leave your browser.
Who built this site?
Crochet Calc is built and maintained by crocheters who got tired of running the same math in spreadsheets for every project. The reference articles are reviewed by CYC-certified instructors. See the About page for full editorial standards and bylines.
A craft tool with a paper trail.
Made by crocheters, audited by CYC instructors, free forever. No data leaves your browser.