The Ultimate Crochet Calculator Hub for Every Project

Why Thousands of Crocheters Trust Our Free Calculators

Running out of yarn mid-project is one of the most frustrating experiences any crocheter can face. You've spent hours — sometimes weeks — building row after row of beautiful stitches, only to realize you don't have enough yarn to finish. Worse yet, your original dye lot may no longer be available, leaving you with a visible color mismatch in your finished piece. Our yarn yardage calculator eliminates this risk by giving you a precise estimate based on your personal gauge swatch, project dimensions, and yarn weight.

Gauge is the single most important variable in crochet, yet it's the one most often overlooked. Two crocheters using the same yarn and the same hook can produce wildly different stitch sizes based on their individual tension. Our gauge swatch calculator helps you compare your personal gauge against any pattern's requirements and tells you exactly how your finished dimensions will differ — plus whether you should go up or down a hook size.

The three different hook sizing systems — metric millimeters, US letter/number designations, and UK/Canadian numbering — create confusion for crocheters worldwide, especially when following international patterns. Our hook size converter instantly translates between all three systems, so you always pick up the right hook for your pattern.

Accurate stitch counting is the foundation of every successful crochet project. Whether you're working a foundation chain for a baby blanket or calculating repeats for a complex lace pattern, knowing the exact number of stitches and rows you need prevents costly mistakes. Our stitch counter and row calculator takes your gauge measurements and desired dimensions and outputs everything you need: total stitches, total rows, foundation chain count, and stitches per inch.

Blankets are among the most popular crochet projects, but they're also the most yarn-intensive. A queen-size blanket in worsted weight yarn can require over 3,000 yards — that's roughly 15 skeins, which represents a significant investment of both money and time. Our blanket size calculator provides preset dimensions for nine standard blanket sizes (lovey through king) and calculates yarn requirements based on your chosen yarn weight, including a 15% buffer for peace of mind.

Every calculator on Crochet Calc runs entirely in your browser using vanilla JavaScript — no data is collected, no account is required, and no ads interrupt your workflow. We built these tools because we believe every crocheter deserves access to professional-grade planning resources, whether you're working on your first dishcloth or your hundredth sweater.

Built for Every Crocheter: Beginners to Advanced Designers

Our tools are designed with simplicity at the surface and depth underneath. Beginners will appreciate the clear labels, helpful defaults, and educational content that surrounds each calculator. Advanced crocheters and independent pattern designers will value the precision formulas, the ability to input custom swatch sizes, and the detailed breakdowns that include stitches per inch, foundation chain counts, and buffer calculations. Every tool includes pro tips based on guidance from the Craft Yarn Council and experienced fiber artists.

Industry-Standard Formulas from the Craft Yarn Council

All of our calculators use formulas consistent with the Craft Yarn Council's (CYC) published standards for yarn weights, gauge ranges, and hook size pairings. The CYC's standardized yarn weight system (categories 0 through 7, from lace to jumbo) forms the basis of our blanket size and yarn estimation calculations. When you use our tools, you're getting results grounded in the same framework that yarn manufacturers, pattern publishers, and crochet instructors rely on worldwide.