Craft Sums: Arithmetic for the Craft Room

Field notes

Craft Sums organizes material arithmetic into separate calculators for quilting, sewing, yarn, stitching, resin, and candles. Its stated method is deliberately inspectable: resin uses area times depth, gauge uses a ratio, and other tools expose assumptions such as fabric width, framing margin, waste, or fragrance load. The homepage lists support for multiple resin mix ratios and cross-stitch counts from 11 through 22, and says calculations run locally in the browser without saving inputs.