Crafts & Sewing
Project calculators for makers: fabric yardage, knitting and crochet gauge, yarn substitution, seam allowance, cross stitch fabric and quilt backing, so you buy the right amount.
Bias Tape Calculator
Find how much continuous bias tape a fabric square makes. Enter the square size and strip width to get total tape length in inches and yards.
Blanket Yarn Calculator
Plan a blanket cast-on, rows and yarn. Enter the width, length and gauge to estimate stitches, total rows, yards and the skeins you need to buy.
Candle Cost Calculator
Work out the cost to make a candle. Add wax, fragrance, wick, container and other costs to get a per-candle total for pricing your candles.
Candle Fragrance Calculator
Calculate fragrance oil for a candle batch by wax weight. Enter wax in ounces or grams and a load percent to get fragrance in grams and ounces.
Candle Wax Calculator
Work out how much wax to buy for your candles. Enter container size, count, wax type and fill level to get ounces, pounds and grams of wax.
Clay Shrinkage Calculator
Calculate pottery clay shrinkage from wet to fired. Enter your shrinkage rate and a wet or fired size to find the other and the shrinkage factor.
Crochet Gauge Calculator
Turn a crochet gauge swatch into starting stitches and total rows. Enter the stitches and rows per swatch plus your target size to get whole counts.
Cross Stitch Fabric Calculator
Find the fabric size for a cross-stitch design. Enter stitch count, fabric count and margin to get the stitched area and fabric to cut in inches.
Elastic Length Calculator
Find the elastic length to cut for a waistband or cuff. Enter the body measurement, snug reduction and overlap to get the stretched and cut lengths.
Fabric Yardage Calculator
Find how many yards of fabric you need to cut a set of rectangular pieces. Enter piece size, quantity and bolt width to get rows and total yardage.
Gathering Ratio Calculator
Find the flat fabric length to cut for a gathered or ruffled edge. Enter the finished length and fullness ratio to get the flat length and extra fabric.
Hem Allowance Calculator
Find the cut length to include hem and seam allowances. Enter the finished length, hem and seam allowance, and double fold option to get the length to cut.
Increase Decrease Calculator
Space increases or decreases evenly across a knitting or crochet row. Enter your current and target stitch count to get the interval and instructions.
Knitting Gauge Calculator
Turn a knitting gauge swatch into cast-on stitches and total rows. Enter stitches and rows per swatch plus your target size to get exact counts.
Lye Calculator
Calculate sodium hydroxide (NaOH) and water for cold-process soap. Enter your oils, superfat percent and water ratio to size a safe lye batch.
Quilt Backing Calculator
Find how much backing fabric a quilt needs. Enter the quilt size, overhang and fabric width to get the backing size, widths to seam and total yards.
Seam Allowance Calculator
Find the cut size of a sewing piece from its finished size plus seam allowance. Enter finished width, height and allowance to get the dimensions to cut.
Sweater Yarn Yardage Calculator
Estimate yarn yardage for a plain pullover by size and yarn weight. Pick a size band and a yarn weight to get rough yards and meters to buy.
Yarn Substitution Calculator
Swap the yarn in a pattern and find how many skeins to buy. Enter the skeins called for, original yardage and substitute yardage to get the count.