Everything you need

Built for serious makers.
Precise for every craft.

7 craft modules. Deterministic maths. Camera scanning. Photo-to-pattern. PDF and Word export. This is what world-class craft tooling looks like.

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CORE ENGINE -->
The StitchPlus engine

Zero AI guessing
in the maths

Every other yarn substitution tool asks AI to estimate your stitch counts. AI can get this wrong — especially on complex patterns with raglan shaping, waist darts, or intricate sleeve caps.

StitchPlus runs a deterministic JavaScript calculator first. It computes your stitch ratio, row ratio, and tension adjustment to 4 decimal places. The AI receives those precise numbers and uses them to rewrite your pattern instructions. The code does the maths. The AI adds the expertise.

Example calculation (exact)
Orig gauge: 18 sts/10cm
Sub gauge: 22 sts/10cm (tight knitter ×1.04)
Effective sub gauge: 22.88 sts/10cm
Stitch ratio: 18 ÷ 22.88 = 0.7867
Original CO: 84 sts
New CO: 84 × 0.7867 = 66 sts ← exact
4
decimal places of precision
0
AI estimations in the maths
5
tension style multipliers
3
body measurements for sizing
MODULES -->
7 craft modules

Every calculation your craft needs

Each module is built with deep knowledge of that craft's specific maths — different units, different gauging systems, different finishing requirements. Not a generic calculator painted a different colour.

🧶

Knitting

The flagship module. Designed for the full complexity of knitted garments — from simple scarves to shaped raglan sweaters with multi-size grading.

Yarn substitution with deterministic gauge maths
Measurement-first sizing — bust, body length, arm length + ease preference
Tension style slider (Very Loose → Very Tight) adjusts all counts
Pattern scan via camera — AI reads stitch counts, gauge, and size table
Design from Scratch — generate a full pattern from your yarn and measurements
PDF and Word export of recalculated pattern
Yarn substitution result
Malabrigo Rios → Drops Karisma · Size M · 92cm bust · Average tension
Stitch ratio: 0.7867 (exact)
CO 66 sts (was 84)
Work 2×2 rib for 5cm
Continue in stockinette to 40cm
Buy 6 skeins (520m needed)
0.7867
Stitch ratio
6
Skeins
✓
Verified
🪡

Crochet

All the same precision as the knitting module — but calibrated for crochet's specific characteristics, including the 30% extra yarn crochet typically requires vs equivalent knitting.

Hook/gauge conversion (not needle — interface adapts automatically)
Yarn substitution with crochet-specific tension adjustment
30% yarn uplift warning for knit-to-crochet substitutions
Motif sizing — calculate how many motifs for your finished dimensions
Stitch count recalculation across all shaping
Hook size recommendation
Pattern calls for 5.0mm hook · Your yarn: DK weight
Pattern hook
5.0mm
Recommended
4.5mm
Your DK has 20 sts/10cm vs pattern's 18. Try 4.5mm and swatch first.
✂️

Sewing

Fabric substitution is the sewing equivalent of yarn substitution — and it's equally maths-heavy. Bolt widths, stretch percentages, seam allowances, and grain direction all affect how much fabric you need.

Yardage recalculation when bolt width differs (the main substitution challenge)
Stretch type adaptation — woven, 25%, 50%, 75% four-way, bias cut
Seam allowance comparison and adjustment
Cutting layout implications for width changes
Fabric care and preparation advice per fibre type
Fabric yardage adjustment
Pattern: 2.5m of 140cm cotton voile
Your fabric: 115cm linen

Width ratio: 140 ÷ 115 = 1.217
Adjusted yardage: 2.5 × 1.217 = 3.1m

Cut 3 lengthwise strips at 38cm, not 2 at 47cm.
🧩

Quilting

Quilting has its own unique maths — ¼" seam allowances, block-based construction, and fabric requirements that cascade across dozens of cuts. StitchPlus handles all of it.

Block sizing — finished vs unfinished with seam allowance baked in
Exact fabric yardage per fabric, per block, per quilt size
Backing fabric calculation including piecing if needed
Batting/wadding size with shrinkage allowance by fibre type
Binding yardage calculation (standard 2.5" strips)
Standard sizes: baby, throw, twin, queen, king or custom cm × cm
Queen quilt — 9-patch block
Quilt: 200 × 230cm
Block finished: 15cm (unfinished 15.6cm)
Blocks: 13 wide × 15 tall = 195 total
Primary fabric: 4.2m of 115cm
Background: 3.8m of 115cm
Backing: 5.1m wide-back (274cm)
Batting: 210 × 240cm (cotton — pre-wash)
✝️

Cross Stitch & Embroidery

Two dedicated modules for needle arts — with the specific unit systems each discipline uses (fabric count, strand count, stitch types) rather than a generic calculator.

Fabric count conversion — shows finished size on 14ct, 16ct, 18ct, 28ct etc.
Thread estimator by colour based on design dimensions and strand count
Fabric cut size with configurable border allowance for framing
Embroidery: stitch-type aware thread usage (satin uses 3× more than backstitch)
Hoop size recommendation for design dimensions
Transfer method guidance per fabric and thread type
Cross stitch size conversion
Design: 140 × 180 stitches

On 14ct Aida: 25.4 × 32.8cm
On 18ct Aida: 19.7 × 25.4cm
On 28ct evenweave (over 2): 12.7 × 16.3cm

Fabric to cut (14ct, 5cm border): 35 × 43cm
Thread: ~2 skeins per colour at 2 strands
🎨

Pro Designer Tools

For pattern designers who need to produce technically correct multi-size patterns for publication. StitchPlus generates the full graded spec from your gauge and size chart — ready to build instructions around.

Multi-size output: XS through 4XL simultaneously
Exact cast-on counts per size from your finished bust measurements
Body and sleeve row counts at your gauge
Grading between sizes with clear notation (S, M, L shown in brackets)
Yarn quantity per size
Professional graded output — all sizes in bracket notation ready for tech editing
Multi-size cast-on table
XS
S
M
L
XL
2XL
176
194
212
230
246
264
Cast on stitches per size · 22 sts/10cm gauge · standard ease
OTHER FEATURES -->
More features

Everything else that makes it world-class

📷

Photo to Pattern

Photograph any garment — in a store, in a magazine, on a mannequin. AI identifies construction details, you confirm, enter your measurements, and get a complete pattern.

✦

💬 Pattern Explainer

Paste any confusing instruction, abbreviation, or technique — AI explains it in clear plain English with step-by-step guidance. Free and unlimited on Standard and Unlimited.

🧶

Yarn Recommender

Describe your project, budget, and preferences — get 5 specific yarn recommendations with brand names, prices, and reasons why each one works. Free and unlimited.

🏷

Yarn Label Reader

Photograph a yarn label — AI reads care symbols, weight, gauge, and fibre content and explains everything in plain English. Tells you if the yarn suits your project. Free and unlimited.

🌍

Pattern Abbreviation Decoder

Paste any pattern in any language — Japanese, German, Dutch, French, Italian, English. AI identifies every abbreviation and symbol and rewrites the instructions in clear plain English. Unlimited plan.

✦

Design from Scratch

Describe your yarn, style, and measurements — StitchPlus generates a complete, ready-to-use pattern including materials list, gauge, abbreviations, full row-by-row instructions with every stitch count, all shaping, finishing, and blocking notes. Export as PDF or Word. Pro Add-On (+$5/month) — 5 per month.

📐

Pattern Resize

You already have a pattern — resize it to completely different measurements. Children's to adult, S to 3XL, any size to any other size. Handles gauge changes at the same time. Pro Add-On — 5 resizes per month.

📄

PDF & Word export

Every calculation exports as a branded PDF or .docx — with measurement tables, gauge verification, yarn comparison, and full instructions ready to take to your needles.

👨‍👩‍👧

Family profiles

Save measurements for every family member. Load any profile in one tap — bust, body length, arm length, ease, and tension all fill instantly. Available on Standard and Unlimited.

📱

Works offline (PWA)

Install from your browser — no app store. All offline tools (needle chart, gauge scaler, unit converter, row counter) work without internet. On Android it's virtually native.

🔌

Designer widget

Generate a QR code for your PDF patterns and an embed for your website. Customers self-serve every yarn substitution. Your gauge pre-loaded. Your inbox quiet.

Try everything free for 7 days