Sewing tools for every body

Dozens of free tools for fitting, construction, fabric planning, and pattern printing. The math your sewing pattern doesn't include — done in seconds, entirely in your browser.

Full Bust Adjustment

Pattern pulls across the bust? Calculate the exact slash-and-spread for darted or princess-seam bodices.

Try FBA Calculator

Size & Fit

Pattern Size Finder

Enter bust, waist, and hip — find your size across 11 brands with size charts. Sewing sizes ≠ store sizes.

Size Chart Comparison

Compare sizes across 11 brands side by side. A size 12 at one brand is not the same at another.

Pattern Grading Calculator

Bust fits one size, hip fits another? Calculate the grading path to blend sizes at the side seam.

Ease Calculator

Is your pattern too tight or too loose? Compare your body to the pattern to check ease by fit style.

Bust Adjustments

Full Bust Adjustment (FBA) — Darted

Pattern pulls across the bust? Calculate the exact slash-and-spread amount for darted bodices.

Full Bust Adjustment (FBA) — Princess

Same FBA calculation for princess-seam patterns — spread the side front without darts.

Small Bust Adjustment (SBA) — Darted

Excess fabric at the bust? Calculate the overlap amount for A cup and smaller.

Small Bust Adjustment (SBA) — Princess

Overlap the side front and flatten the CF curve for smaller busts on princess-seam patterns.

Bodice & Shoulders

Shoulder Width Adjuster

Broad or narrow shoulders? Calculate how much to add or remove at the shoulder point.

Swayback Adjuster

Eliminate the horizontal fold at center back waist.

Bodice Length Adjuster

Calculate front and back length adjustments independently.

Sleeve Fitting

Check bicep ease and calculate sleeve width and length adjustments.

Neckline Adjuster

Raise, lower, widen, or narrow a neckline. Get CF/CB length changes.

High Round Back

Fix the horizontal fold across the upper back.

Forward Shoulder

Shoulder seam rolling to the front? Trim front, add to back.

Full Upper Back

Pulling across the upper back between the shoulder blades.

Sleeve Cap Ease Checker

Check if sleeve cap ease is right for your sleeve type.

Pants & Skirts

Pants Size Finder

Find your pants size across Big 4, Burda, Cashmerette, and more. Sized by hip.

Pants Waist-to-Hip Adjuster

After sizing by hip, calculate how much to take in or let out at the waist.

Crotch Depth / Rise Calculator

Calculate front and back rise adjustments from a sitting measurement.

Pants Fit Diagnosis

Select drag lines and fit issues on your toile — get prioritized causes and fixes.

Crotch Curve Estimator

Get a starting-point crotch curve profile based on your body shape.

Circle Skirt Calculator

Full, 3/4, half, or quarter circle — inner/outer radius, fabric yardage, and cutting instructions.

Skirt Fitting

Hip-primary size finder and waist adjuster — for skirts, your hip measurement comes first.

Skirt Size Finder

Find your skirt size across Big 4, Burda, Cashmerette, and more. Sized by hip.

Skirt Waist-to-Hip Adjuster

After sizing by hip, calculate how much to take in at the waist.

Pleat Calculator

Knife, box, or inverted pleats — total fabric width, per-pleat breakdown, folding steps.

Specialty Garments

Bra Sewing Calculator

Cup size, band size, underwire dimensions, sister sizing, and band cut length for sewing bras.

Corset Calculator

Waist reduction, rib/hip spring, panel widths, boning count, and eyelet spacing.

Swimwear Calculator

Negative ease by zone, swim elastic cut lengths, lining, and fabric estimates by style.

Construction

Seam Allowance Calculator

Convert between Burda (none), US 5/8", French 1/2", and more — with step-by-step instructions.

Hem Allowance Calculator

Narrow, double-fold, blind, faced, rolled, or topstitched — the exact allowance and pressing steps.

Dart Manipulation

Move a dart from side seam to shoulder, waist to armhole — the angle stays, the width changes.

Gathering Calculator

How much fabric for gathered skirts, ruffles, and sleeves? Choose a ratio, get the cut length.

Elastic Calculator

Cut length by elastic type (woven, knit, clear, swim) and tension — not just 80%.

Button Spacing Calculator

Evenly space buttons with one always at bust level to prevent gapping.

Bias Binding Calculator

Cut strip width, total length, continuous bias method, and how many packages to buy.

T-Shirts & Knits

T-Shirt Neckband Calculator

Calculate the exact cut length for your neckband from neckline measurement, stretch %, and band type.

T-Shirt Fit Diagnosis

Select what you see on your knit top — get the cause and fix for twisted seams, gaping neckband, and more.

Knit Hem Calculator

Twin needle, coverstitch, band hem, lettuce edge — allowance, settings, and step-by-step for each method.

Knit Stretch Calculator

Measure your fabric's stretch percentage and compare to pattern requirements.

Stretch Adjustment Calculator

Fabric has less stretch than the pattern needs? Per-zone width adjustments.

Fabric & Layout

Fabric Yardage Calculator

Enter your pattern pieces — see how much fabric for 44", 54", and 60" widths with a layout diagram.

Will This Fabric Work?

Enter your fabric's weight, drape, and stretch to check compatibility with your pattern.

Fabric Layout Optimizer

Premium

Arrange pattern pieces on fabric to minimize waste — saves 15-30% vs manual layout.

Fabric Shrinkage Calculator

Cotton shrinks 3-5%, linen 5-10%. Find out how much extra to buy, or measure a swatch.

Pattern Matching Calculator

Stripes, plaids, or large prints — how much extra fabric you need for matching at seams.

Lining Calculator

Which pieces to line, how much lining fabric, ease adjustments, and hem treatment.

Unit Converter

Inches ↔ cm ↔ mm ↔ yards ↔ meters, plus fabric width and seam allowance reference charts.

What Fabric Should I Use?

Recommended fabrics by garment type — weight, drape, stretch, and real examples for every project.

Fitting & Evaluation

Muslin / Toile Evaluation

Select what you see on your test garment — get the cause and the fix for each issue.

Muslin Fitting Session

Premium

Step-by-step fitting checklist, measurement translator, and change log with PDF export.

Fitting Profile

Save your measurements and fitting preferences for quick access across all tools.

Adjustment Plan

Premium

See all recommended adjustments based on your fitting profile, in order.

Guided Apply

Premium

Step-by-step guided walkthrough to apply adjustments to your pattern.

Adaptive Fitting

Seated-body adjustments for wheelchair users, sensory-friendly construction, one-arm dressing, and more.

My Workshop

Fabric Stash

Track your fabric collection: type, colour, yardage, fibre content. Know what you have before buying more.

Project Planner

Track sewing projects from planning to finish. Record pattern, fabric, adjustments, and what worked.

Pattern Drafting

Basic Block / Sloper

Draft a bodice or skirt block from your body measurements — the foundation of all pattern making.

Print & PDF

Scale Checker

Measure the test square on your printed pattern and get the correct reprint percentage.

PDF Scale Verifier

Upload a pattern PDF to check page dimensions, detect test squares, and flag scale issues.

Home Printer Tiling

Enter pattern dimensions and get page count, assembly grid, and taping instructions.

Plotter Calculator

For 24", 36", 44", and 60" roll plotters. Get roll length needed and a layout diagram.

Tiled to Plotter Converter

Premium

Combine a multi-page tiled PDF into a single large page for your plotter.

Plotter to Tiled Converter

Premium

Split an A0 or plotter PDF into Letter or A4 pages for home printing.

PDF Layer Toggle

Premium

Select which size layers to keep visible in a multi-layer pattern PDF.

Pattern Modifier

Premium

Detect pattern pieces in a PDF and apply seam allowance, lengthen/shorten, or grading.

PDF Pattern Nesting

Premium

Upload a pattern PDF, detect pieces automatically, and get an optimized fabric layout.

Print Shop Guide

Find the right large-format size — A0, A1, Arch D, and more.

Fitting Summary

Fill in all your adjustments and download a PDF fitting card for the cutting table.

Home Dec & Quilting

Curtain Calculator

Fabric yardage for curtains — by window size, header style, fullness ratio, and panel count.

Quilting Calculators

Backing yardage, binding strips, border fabric, and strip piecing — four tools in one.

Gear & Supplies

Curated sewing machines, sergers, coverstitch machines, and supplies from respected independent retailers worldwide.

Fabrics & Materials

The best independent fabric shops worldwide — fashion fabric, knits, linen, deadstock, Japanese textiles, and sewing pattern magazines.

Recommended Tools & Notions

Cutting tools, measuring supplies, pressing equipment, and sewing notions (haberdashery) we actually use.

Not sure where to start?

Making a top or dress?

Find your pattern size, check for a bust adjustment, then use the bodice fitting tools.

Making pants or a skirt?

Start with the pants size finder or circle skirt calculator.

Need to know how much fabric?

Use the yardage calculator or fabric layout optimizer.

Have a PDF pattern?

Scale checker, tiling, retiling, layer toggle, and plotter tools.

Dozens of free tools. No account required. No ads. Your data never leaves your browser. Works offline on your phone at the cutting table.