Free Sewing Calculators & Tools
Quick, accurate math for everyday sewing decisions — no signup, no ads. Built by the team behind Sewist Studio, the digital sewing room organizer.
Circle Skirt Yardage Calculator
Calculate yardage, inner radius, and outer radius for full, 3/4, or half circle skirts.
Open calculatorKnit Stretch Percentage Calculator
Measure a knit's stretch percentage and check it against your pattern's requirement.
Open calculatorFabric Yardage & Length Converter
Convert between centimeters, inches, meters, yards, and feet — instantly.
Open calculatorFabric Yardage Calculator
Estimate how much fabric any project needs by garment, size, and fabric width.
Open calculatorSmocking Pleater Calculator
Calculate the flat fabric size to cut before pleating for any smocking plate.
Open calculatorWant to save your results?
A free Sewist Studio account lets you store calculations against real projects, auto-pull yardage from your fabric stash, and get AI-powered pattern suggestions.
Create a free account