Free Sewing Calculators & Pattern Drafting Tools
Master Pattern Drafting Studio
Synchronize upper and lower body proportions to generate custom balanced slopers for fitted dresses and outerwear.
Launch Studio →Custom Bodice Sloper & Top Pattern Generator
Draft tailored front and back basic bodice blocks based on bust apex, nape-to-waist, and shoulder slopes.
Open Generator →Custom Skirt Sloper Pattern Generator
Create tailored straight, pencil, and A-line blocks with automatic waist-to-hip dart distribution.
Open Generator →Circle Skirt Pattern & Yardage Calculator
Calculate exact inner waist radius and cutting yardage across full, 3/4, half, and quarter circle styles.
Calculate Skirt →Tiered & Ruffle Skirt Calculator
Compute tier cutting lengths, gathering multipliers (1.5x to 2.5x), and balanced hem heights.
Calculate Tiers →Box & Knife Pleat Calculator
Calculate total fabric strip lengths, underlay depths, and spacing markers for crisp pleated waistbands.
Calculate Pleats →Fabric Shrinkage & Pre-Wash Estimator
Calculate pre-wash length and width shrinkage for raw linen, denim, and cotton to ensure adequate yardage.
Estimate Shrinkage →Continuous Bias Tape Calculator
Find the exact fabric square dimensions to yield yards of seamless single-fold or double-fold bias tape.
Calculate Yardage →Thread Spool & Usage Estimator
Project thread meterage needed for lockstitch seams, 3-thread serging, and 4-thread overlocking.
Estimate Thread →Curtain & Drape Yardage Calculator
Calculate bolt requirements, fullness multipliers (1.5x–3x), and bottom hem puddle allowances.
Calculate Yardage →Quilt Backing & Batting Calculator
Compute backing yardage, piecing orientations, and 4-inch overage borders for standard mattress sizes.
Calculate Backing →Tote Bag Boxed Corner Calculator
Solve corner cutout heights to determine base depth, standing width, and interior volume for tote bags.
Calculate Corners →Pillow & Cushion Cover Calculator
Formulate front and envelope-back cut dimensions and piping cord allowances for snug, plump inserts.
Calculate Covers →