Madder
Fiber and maker craft calculators
Counted thread, quilt layout, yarn, knitting gauge, epoxy, and candle wax. Each tool shows the cut or the pour before you buy the materials.
Cross Stitch Calculator
Cross stitch fabric calculator. Enter the stitch count, fabric count, and margin to get the cloth size in inches or centimeters, with a cutting diagram.
Quilt Backing Calculator
Quilt backing calculator for yardage. Add overhang, piece 42 inch or 108 inch fabric the cheaper way, and round up to the next eighth of a yard.
Quilt Binding Calculator
Quilt binding calculator for straight-grain strips. Perimeter, join allowance, strip count, and yardage from the width of fabric.
Resin Calculator
Epoxy resin calculator for rectangular pours, cylinders, and river channels. Volume in fluid ounces and millilitres, split by mix ratio.
Candle Wax Calculator
Candle wax and fragrance calculator. Turn a water weight into wax and fragrance oil for soy, paraffin, coconut-soy, or beeswax.
Quilt Size Calculator
Quilt size calculator from a mattress preset, drop, and pillow tuck. Block layout and a suggested border, with links into the backing and binding tools.
Quilt Border Calculator
Quilt border calculator for butted or mitered corners. Strip length, strip count, and yardage from a 1/4 inch seam.
Half Square Triangle Calculator
Half-square triangle and flying geese calculator. Two-, four-, and eight-at-a-time squares, plus the no-waste geese sizes.
Fabric Yardage Calculator
Fabric yardage calculator. Piece size, quantity, and fabric width, with a cutting layout. Directional fabric stays in one orientation.
Blanket Yarn Calculator
Yarn calculator for a blanket. Craft Yarn Council weight, knit or crochet, and yards per skein. The yardage is an estimate.
Knitting Gauge Calculator
Knitting gauge calculator. Compare your stitches and rows per 4 inches with the pattern, then cast on for a target width.
Knitting Increase and Decrease Calculator
Evenly spaced knitting and crochet increases and decreases. Flat or in the round, with the remainder written out.
How these calculators work
These are shop tools, not craft trivia. A cross stitch calculator turns a stitch count and fabric count into the cloth you actually cut, including the margin. Quilt tools turn a finished top into backing yardage and binding strips. Resin and candle tools turn a mold or a jar into a batch you can weigh.
Yardage is rounded up to the next eighth of a yard, the way a quilt shop cuts. Resin is converted with the exact US gallon identity, 128 fluid ounces per 231 cubic inches. Candle batches use a specific-gravity factor you can override when your wax supplier prints a better one.