🧢 Hat & Hood Size Grader

Step 1 · Add your pattern

Text-based PDFs work best; for scanned PDFs paste the text instead. Everything runs in your browser.

Tips: start each part with a heading line (e.g. BRIM, BODY, CROWN, EAR FLAPS, HOOD, NECKLINE, FACE EDGE). Tag a stitch multiple on its own line like [multiple of 8]; it applies until [multiple off] or the next tag. For crowns, tag the multiple that matches the number of increases or decreases per round (often 6, 8 or 12) so the totals always divide evenly. Crowns grade best when written by sections ("divide into 8 equal sections… repeat until 1 st remains in each section") rather than with a stitch total after every round; use the top-down crown table in the results for the exact counts.

Step 2 · Choose the size you made and the sizes you want

Select your base size (the size you crocheted) and tick every size you want written out. These are typical body measurements and are fully editable. Head is measured around the forehead just above the ears. Hat height is from the crown to the bottom of the brim (just covering the ears). Hood height is from the base of the neck at the shoulder, straight up over the ear, to the top of the head. Hood depth is from the forehead to the back of the head. Neck is around the base of the neck.

The scaling comes from the size chart (same yarn, same gauge). Gauge, ease and increases per round are only used for the cross-check and top-down crown table in the results. Fitted hats usually use about −10% ease (smaller than the head; stretchy ribbing up to −15%, slouchy hats 0% or more). Top-down crowns usually add 6 stitches per round in sc, 8 in hdc and 12 in dc, but use whatever your pattern does.

Step 3 · Options & section adjustments

Each section chooses which measurement drives its stitches and rows. By default BRIM, BAND and BODY use head around and hat height; CROWN and EAR FLAPS use head for both (crown rounds grow with the head); HOOD uses hood height for stitches and hood depth for rows; NECKLINE, COWL and YOKE use neck; FACE EDGE and TRIM follow hood height and aren't lengthened; POMPOM isn't scaled. Change any of them below. Click a highlighted number in the results to lock or unlock it.