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Craft Tools
Weaving, spinning, and knitting calculators rebuilt as pure, tested functions. Pick a tool to start.
Warp and weft yardage for a weaving project, accounting for fringe, sampling, loom waste, shrinkage, and take-up.
Estimate ideal sett (EPI) from yarn weight (yards per pound) and weave structure.
Find single- and two-reed threading patterns that hit a target sett with the reeds you own.
Preview every warp × weft intersection as a channel-average of the two colors.
Find yards-per-pound from a sample, or total yardage from a weight and a known YPP.
Twist angle from TPI and diameter, plus recommended TPI bands and the twist multiplier.
Identify a yarn's weight category from a measured wraps-per-inch count.
Convert between percentages and weights for a two-fiber blend.
Stitches and rows per inch from a swatch, then cast-on stitches and rows for your project.
Evenly space decreases or increases across a single row, or distribute them over many rows.
How many skeins of a substitute yarn you need, adjusting required yardage by the gauge ratio.
Estimate sweater yarn yardage from size, weight, style, fit, sleeve, and body length.