Accurate, deterministic craft math designed to answer real questions before you chain. Each tool operates entirely on your device with offline capability and full export support.
Solves: Fixes sizing surprises when your stitch tension differs from a pattern’s swatch—showing how many stitches and rows you need at your own tension.
Convert swatch stitch and row counts into standard 10 cm and 4-inch gauge, and estimate stitch and row counts for your target project width and height.
Solves: Prevents leftover foundation chains at the end of Row 1 and stops side borders from making your finished blanket wider than planned.
Subtract side border widths first, match your stitch pattern’s repeat multiple and extra edge stitches, and add your pattern’s turning-chain offset.
Solves: Helps you substitute a new stitch motif (like shells, ripples, or V-stitches) onto an existing stitch count without ending the row on an incomplete repeat.
Check whether your stitch count fits a pattern’s “Multiple of m + e” rule and compare the nearest lower and higher compatible counts.
Solves: Eliminates lopsided bunching when adding or removing stitches between a ribbed cuff and a sweater sleeve, yoke, or hat crown.
Space single-pass increases or decreases evenly across a flat row with step-by-step instructions where consumed and produced stitches balance.
Solves: Reduces the risk of running out of a dye lot when working with a different hook size, yarn weight, or stitch density than generic yardage charts assume.
Scale the measured area and gram weight of your own gauge swatch to your project dimensions, add a safety buffer, and round up to whole skeins.
Solves: Translates measurements between US, UK, and European patterns and yarn ball bands without rounding errors.
Convert centimeters and inches, meters and yards, and grams and ounces using standard international conversion factors.
Solves: Keeps your place in multi-row lace or stripe repeats between crochet sessions without needing an account.
Track completed rows, target counts, and current row inside repeating stitch cycles with undo support and local browser saving.