✦ Smart tools for every craft you love

The calculator
every crafter
wished existed.

Scan your pattern, enter your yarn — get exact numbers in 3 minutes. Yarn substitution, gauge conversion, fabric yardage, thread estimation, HST maths, DMC conversion. Zero guessing. Every craft.

Start 7-day free trial See how it works

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Trusted by makers across 6 craft disciplines · No card required

Pattern scan complete

✓ 84 words extracted

Gauge + size table found

✦ Recalculated

🧶 Knitting

Size M · 92cm bust

Average tension

Malabrigo Rios (18 sts)→Drops Karisma (22 sts)

StitchPlus calculation — exact, not estimated

CO 68 sts (was 84) · Work 2×2 rib for 5cm
Continue in stockinette to 40cm
Buy 6 skeins Drops Karisma (520m needed)

81.8%

Stitch ratio

Skeins

Your size

Design from Scratch

Pattern generated ✓

Oversized raglan · all sizes

How it works

From pattern to perfect numbers
in under 3 minutes

No maths knowledge needed. Scan your pattern, enter your yarn's gauge, tell us your measurements — StitchPlus handles everything else with precision.

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Scan or upload your pattern

Point your phone camera at any pattern page — knitting book, printed PDF, or digital file. AI reads the gauge, stitch counts, and size table automatically. Or paste the text directly.

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Enter your yarn and measurements

Tell StitchPlus your substitute yarn's gauge, your bust measurement, preferred ease, and tension style. Save these to your profile and they load instantly next time.

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Get exact recalculated instructions

StitchPlus's deterministic calculator computes exact stitch and row ratios first — then AI rewrites every pattern instruction using those precise numbers. Download as PDF or Word.

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Zero AI guessing in the maths

Unlike tools that ask AI to estimate stitch counts, StitchPlus runs a deterministic JavaScript calculator first. Every ratio is computed to 4 decimal places before Claude touches the pattern. The AI writes the narrative — the code does the numbers.

Craft modules

One smart home for every craft you love

Choose the crafts you use now. Add more anytime. Each module is built with deep knowledge of that craft's specific calculations — gauge systems, material units, and finishing requirements.

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Knitting

Yarn substitution, gauge conversion, stitch recalculation, size from measurements, sleeve shaping

Standard & Unlimited

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Crochet

Hook/gauge conversion, yarn substitution, motif sizing, stitch counts, yardage calculation

Standard & Unlimited

✂️

Sewing

Fabric substitution, bolt width yardage recalculation, seam allowance adjustment, stretch %

Standard & Unlimited

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Quilting

Block sizing, exact fabric yardage per piece, backing calculation, shrinkage allowance

Standard & Unlimited

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Cross Stitch

Fabric count conversion, finished size calculation, thread skein estimator, border allowance

Standard & Unlimited

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Embroidery

Hoop sizing, thread quantity by stitch type, fabric requirements, design scaling

Standard & Unlimited

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Pro Designer

Multi-size pattern generation — full grading across XS–4XL. Generates materials list, gauge, abbreviations, and complete instructions with all stitch counts per size in professional bracket notation XS (S, M, L, XL, 2XL)

Standard & Unlimited

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Photo Pattern

Photograph any garment — AI identifies construction, generates a full pattern to recreate it

Standard & Unlimited

Features

Everything a serious maker needs, built in

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Measurement-first sizing

Enter your bust, body length, and arm length. StitchPlus reads the pattern's size table and tells you exactly which size to make — then calculates every stitch count for it.

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Tension style slider

Set your knitting style from Very Loose to Very Tight. Adjusts all stitch counts beyond the gauge ratio — because even with the same yarn, your tension is yours.

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DMC / Anchor / Madeira converter

Convert between thread colour systems instantly. Search by code or colour name. Discontinued colours flagged with closest current alternatives. Offline, instant, no cap.

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HST, Flying Geese & strip piecing

Quilting's most needed tools. Starting square size, sub-cut counts, yardage per colour — calculated precisely. Plus diagonal / on-point setting with setting triangle maths.

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Sewing: grade, shrink, convert

Multi-size grading (12 bust, 16 hips — no problem), fabric shrinkage by fibre type, seam allowance converter, lining yardage, and zip & notions calculator.

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Cross stitch & embroidery tools

Design resize to fabric count, thread usage by stitch type (satin uses 3× more than backstitch), embroidery coverage calculator by fill density. All offline.

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Design from Scratch

Describe your yarn, style, and measurements — StitchPlus generates a complete, ready-to-use pattern: materials list, gauge, abbreviations, full row-by-row instructions with all stitch counts, shaping, finishing, and blocking. Pro Add-On (+$5/month) · 5 per month.

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PDF & Word export

Every recalculated pattern exports as a branded PDF or Word document — with measurement tables, gauge verification, yarn comparison, and full instructions.

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13 offline tools — always available

Needle chart, gauge scaler, skein calculator, shrinkage, seam allowance, HST, Flying Geese, strip piecing, on-point setting, DMC converter, design resize, thread coverage. Zero AI. Every plan.

Pricing

Start crafting smarter
for less than a coffee

7-day free trial on all plans. No credit card required. Cancel anytime.

Monthly

Annual 2 months free

Free Trial

7 days · no card needed

Experience StitchPlus with 1 module before committing.

1 craft module (your choice)

5 AI calculations

3 pattern scans

All offline tools

Photo Pattern

Design from Scratch

PDF / Word exports

Start free trial →

From frogging disasters
to confident making

★★★★★

"I had 8 skeins of Drops Karisma that didn't match anything on Ravelry. Scanned the pattern, entered my gauge, got the full recalculated instructions in 2 minutes. I would have given up on this project."

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Sarah M.

Knitter · Melbourne, AU

★★★★★

"As a pattern designer I used to spend hours answering 'can I use X yarn instead?' emails. Now I put the widget in every pattern PDF. My customers self-serve and my inbox is quiet."

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Emma K.

Pattern designer · 2,400 Ravelry sales

★★★★★

"We run it on a tablet at the counter. When a customer asks 'can I use this instead of that?' — we open StitchPlus and have the answer in under a minute. It's become part of how we serve customers."

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Julie R.

Owner · The Wool Room, Brisbane

Affiliate programme

Earn while your
audience crafts smarter

Recommend StitchPlus and earn a recurring commission every month your referrals stay subscribed. No minimums. No complexity.

25%

Bloggers, creators
& podcasters

25%

Yarn shops &
pattern designers

Example monthly earnings

50 referrals × $8.99 × 25%$112/month

100 referrals × $8.99 × 25%$225/month

50 shop referrals × $8.99 × 30%$135/month

Passive incomeEvery month they stay

60-day cookie · Monthly payouts from $25 · PayPal or bank transfer

Join as a partner or affiliate

Tell us a bit about you and we'll be in touch within one business day.

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Email address

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Website / social handle

For yarn shops & brands

Turn substitution
questions into sales

Every time a customer asks "can I use this instead?" is a sale waiting to happen — if you can answer it confidently and fast. StitchPlus gives your team that answer in under a minute.

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Kiosk mode for your counter tablet

Branded interface your staff can use with every customer who walks in asking about substitutions.

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Your stock in the database

Your yarns surface as substitute suggestions — every calculation becomes a stocking recommendation.

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20 Pro vouchers / month

Give your best customers free access. They come back. You build loyalty while StitchPlus does the maths.

Yarn Shop plan

$49/month · cancel anytime

Book a demo →

Revenue model for yarn shops

Customer walks in with a pattern for discontinued yarn

Before StitchPlus: "I'm not sure, let me look it up…" (15 mins, uncertain answer)

After StitchPlus

"Scan the pattern. Your bust? 90cm. Here are 3 yarns from our stock that work — and here's exactly how many skeins you need." (90 seconds, confident sale)

FAQ

Common questions

How is StitchPlus different from just asking AI to recalculate?

Other tools ask AI to estimate stitch counts — and AI can get this wrong, especially in complex shaping. StitchPlus runs a deterministic JavaScript calculator first, computing exact ratios to 4 decimal places. The AI only writes the narrative instructions using those pre-calculated numbers. Zero guessing in the maths.

Can I use StitchPlus for crochet, sewing and quilting too?

Yes — StitchPlus has 7 craft modules: Knitting, Crochet, Sewing, Quilting, Cross Stitch, Embroidery, and Pro Designer Tools (Pro Add-On). Standard gives you any 2 modules, Unlimited gives you all 7.

Do I need to install an app?

No app store needed. StitchPlus is a Progressive Web App — visit stitchplus.au and your browser will offer to install it to your home screen. It then works like a native app: offline calculators, camera access, home screen icon. On iPhone, tap Share → Add to Home Screen.

What does Design from Scratch do?

Design from Scratch is available on the Pro Add-On (+$5/month on any Standard or Unlimited plan) — 5 generations per month. You describe your yarn, style preferences, and enter your measurements — StitchPlus generates a complete, ready-to-use pattern — materials list, gauge swatch instructions, full abbreviations, complete row-by-row written instructions with every stitch count, all shaping (increases, decreases, neckline, sleeves), finishing, and blocking notes. Export as PDF or Word and cast on immediately. Pattern Resize (also 5/month with Pro Add-On) resizes any existing pattern to completely new measurements — for example, a children's pattern to adult size.

How does the pattern scan work?

Tap Scan with Camera or Upload a Photo in the Calculate tab. AI reads the pattern text — gauge, stitch counts, row counts, size table — and populates the pattern text field automatically. You can also type or paste pattern text directly.

Can I save my measurements so I don't re-enter them?

Yes — family dimension profiles are available on Standard and Unlimited plans. Save your bust, body length, arm length, ease preference, and tension style. Add profiles for family members too. Load any profile with one tap and all fields fill instantly.

Is there a limit on how many calculations I can do?

Yes — to keep costs sustainable. Trial: 5 calculations. Standard: 30 calculations, 20 pattern scans, 10 Photo Patterns per month. Unlimited: 100 calculations, 60 scans, 30 photo patterns per month. Pro Add-On: 5 Design from Scratch and 5 Pattern Resize per month. All 13 offline tools (needle chart, gauge scaler, HST calculator, DMC converter, and more) are always unlimited on every plan.

Can I embed StitchPlus in my pattern PDFs?

Yes — the widget generator creates a QR code for your PDF and an embed button for your website. When customers scan the QR, StitchPlus opens with your pattern's gauge pre-loaded. Available on Creator, Unlimited, and Designer plans. Your customers never have to ask "can I use X instead?" again.

The calculatorevery crafter wished existed.

From pattern to perfect numbersin under 3 minutes

One smart home for every craft you love

Knitting

Crochet

Sewing

Quilting

Cross Stitch

Embroidery

Pro Designer

Photo Pattern

Everything a serious maker needs, built in

Start crafting smarterfor less than a coffee

From frogging disastersto confident making

Earn while youraudience crafts smarter

Join as a partner or affiliate

Turn substitutionquestions into sales

Common questions

Calculate first.Never frog again.

The calculator
every crafter
wished existed.

From pattern to perfect numbers
in under 3 minutes

Start crafting smarter
for less than a coffee

From frogging disasters
to confident making

Earn while your
audience crafts smarter

Turn substitution
questions into sales

Calculate first.
Never frog again.