sewing Calculators
Last updated: May 2026
Fabric Yardage Calculator
Calculate the total yardage of fabric to buy for a sewing project based on project dimensions and fabric bolt width.
Seam Allowance Calculator
Calculate the total cut fabric area needed when adding seam allowances to a target finished size.
Bias Tape Length Calculator
Calculate how much bias tape or binding you need to finish the edges of a fabric project, including extra for mitering corners and a working buffer.
Quilt Backing Calculator
Calculate yardage of quilt backing fabric required including the overhang needed for longarm quilting or stretching on a frame.
Buttonhole Spacing Calculator
Calculate the center-to-center distance between buttonholes on a placket for evenly spaced results.
Fabric Gathering Calculator
Compute the flat cut length of fabric needed to gather down to a target finished length, using a chosen gather ratio.
Hem Allowance Calculator
Compute the total fabric cut length needed for a garment with a chosen hem depth and a top seam allowance, so the finished length matches the design.
Zipper Length Calculator
Compute the minimum zipper length to buy for a given opening length and zipper type, accounting for slider parking and stop placement.
Elastic Length Calculator
Compute the cut length of elastic for a waistband, cuff, or casing so it grips comfortably without cutting in or sliding.
Pattern Scaling Calculator
Compute scaled pattern dimensions when you need to enlarge or reduce a sewing pattern by a percentage.
Fabric Yardage Calculator
Estimates the total yards of fabric needed for a sewing project based on garment type, size, and fabric width.
Quilt Fabric Calculator
Calculates the yards of fabric needed for a quilt's backing and binding based on finished dimensions, batting overhang, and binding strip width.
Seam Allowance & Cutting Calculator
Computes the cutting dimensions of a fabric piece by adding seam and hem allowances to your desired finished size.
Sewing Time Estimator
Estimates the total hours needed to complete a sewing project based on project type, skill level, pattern complexity, and preparation time.
Buttonhole Spacing Calculator
Calculates the even spacing between buttonholes along a garment placket given the placket length, number of buttons, and top and bottom margins.
Bias Tape Calculator
Find exactly how much fabric you need to cut continuous bias tape or binding for quilts, garments, and crafts.
Elastic Length Calculator
Calculate the exact elastic length for waistbands, sleeve cuffs, and casings so garments fit snugly without distortion.
Thread Consumption Calculator
Estimate how many yards of thread a sewing project will consume based on seam length, stitch length, and waste allowance.
Pattern Grading Calculator
Determine how much to shift each grading point on a sewing pattern when adjusting from one size to another.
Interfacing Yardage Calculator
Calculate the yardage of interfacing needed to stabilize garment pieces like collars, cuffs, and facings.
Fabric Yardage Calculator
Determine exactly how many yards of fabric to buy for any sewing project.
Quilt Batting Size Calculator
Find the exact batting dimensions needed for your quilt, accounting for quilting overhang and binding width.
Seam Allowance Fabric Calculator
Calculate how much extra fabric you need when changing the seam allowance from what a pattern specifies.
Fabric Gathering Ratio Calculator
Calculate the pre-gathered fabric length needed to achieve the right fullness for ruffles, skirt hems, and sleeves.
Interfacing Yardage Calculator
Estimate how many yards of interfacing to buy for a garment's collars, cuffs, facings, and button bands.
Quilt Backing Calculator
Determines how many yards of backing fabric to buy for any quilt, accounting for overhang, piecing seams, and pre-wash shrinkage.
Zipper Length Calculator
Finds the correct zipper length to order for any garment opening, factoring in stop allowances and seam allowances.
Pattern Ease Calculator
Calculates the total pattern measurement — body measurement plus wearing ease and design ease — so your sewn garment fits correctly.
Quilt Backing Calculator
Calculates the number of fabric panels needed to back a quilt of any size, including overhang and a 1-inch seam buffer per panel.
Thread Consumption Calculator
Estimates the total thread needed in feet for any seam by combining seam length, stitch density, and a waste allowance.
Pattern Grading Calculator
Calculates new pattern measurements when grading a sewing pattern up or down between sizes.
Fabric Shrinkage Calculator
Calculates how many extra yards of fabric to purchase to account for shrinkage when pre-washing before sewing.