Yarn Plan Lab is an independent collection of free crochet planning tools. We help translate measured swatches, yarn labels and pattern rules into numbers you can use.
How these tools are made
The site and its guides are developed with AI assistance. We explain formulas, check calculations against worked examples, and link to relevant craft references. We do not claim professional crochet credentials or that we have crocheted the example blankets. Physical project validation has not yet been completed.
Yarn estimates depend on the measurements you supply. They are planning aids, not patterns or guarantees. Each tool explains its assumptions and limits.
Questions, corrections and feedback
Contact the site operator at expertoiosbv@gmail.com. For a calculation issue, include the tool name, input numbers and what you expected. If you use a tool for a finished project, feedback comparing the estimate with actual use is welcome. Do not send sensitive personal information.
Free to use
No account or payment is required. There are currently no ads or affiliate links. Calculator inputs are processed in your browser. Read the privacy information.