Free Tools — No Signup — No Data Collected
Free Garment Manufacturing Tools for Clothing Brands & Apparel Buyers
14 free calculators and tools covering every stage of apparel sourcing — from AQL quality inspection and GSM fabric weight conversion to EU compliance checking, production timeline planning, wash care label generation, and HS code classification. Built and maintained by SDF Clothing, a Bangladesh garment manufacturer since 1998. These tools are used before every order we produce — which is why they are accurate.
Why tools from a factory are different
Most garment manufacturing calculators are built by content websites that have never produced a garment. SDF Clothing has been running production since 1998. Our AQL calculator reflects how we actually inspect orders. Our GSM reference values are taken from the fabrics we source and cut. Our EU compliance checker covers the regulations our EU clients ask about every week. These tools are accurate because we use them ourselves.
Why These Tools Exist — and Why a Factory Builds Them Better
Most free garment manufacturing calculators are built by content websites and SEO agencies. They are accurate enough for general reference but lack the specificity that comes from actually running a production floor. SDF Clothing has been producing garments since 1998. Every tool on this page reflects how we operate: our AQL calculator matches our in-house inspection process; our GSM reference values are pulled from actual fabric specifications; our EU compliance checker covers the exact regulations our EU clients ask about in every onboarding call.
These tools are not lead generation gimmicks. They are free because better-prepared buyers lead to better production outcomes. A brand that understands AQL before they first contact us produces better garments than one that doesn't — and that is good for everyone.
How SDF's Tools Compare to Other Garment Calculators
Several garment tool sites exist. Here is an honest comparison of what is available and where the gaps are:
| Tool / Feature | SDF Clothing | GarmentCalc | Apparel.wiki | Ninghow |
|---|---|---|---|---|
| AQL Calculator (ISO 2859-1) | ✓ Full | ✓ Full | ✓ Partial | ✗ |
| GSM to OZ Converter | ✓ + reference chart | ✓ | ✓ | ✓ |
| Wash Care Label Generator | ✓ ISO 3758 compliant | ✗ | ✗ | ✗ |
| EU Readiness Checker (GPSR, ESPR, DPP) | ✓ 18-question tool | ✗ | ✗ | ✗ |
| Manufacturer Email Generator | ✓ | ✗ | ✗ | ✗ |
| Production Timeline Calculator | ✓ Reverse-engineered | ✗ | ✗ | ✗ |
| Landed Cost Calculator | ✓ Inc. duty rates | ✓ Partial | ✗ | ✗ |
| Fabric Shrinkage Calculator | ✓ Warp + weft | ✓ | ✗ | ✗ |
| HS Code Finder (Ch. 61+62) | ✓ | ✗ | ✗ | ✗ |
| Factory behind the tools | ✓ 27 years, 13 certs | ✗ Content site | ✗ Content site | ✓ Factory |
| No signup required | ✓ | ✓ | ✓ | ✓ |
AQL Inspection — What the Standard Actually Means in Production
AQL (Acceptable Quality Level) is the maximum percentage of defective units that can be accepted in a production lot under statistical sampling inspection. It does not mean every unit is inspected — it means a statistically representative sample is checked, and a decision about the entire batch is made based on the defects found in that sample.
The garment industry standard is AQL 2.5 for major defects. This means: if more than 2.5% of your inspected sample has major defects, the entire shipment is rejected and must be reworked before re-inspection. In practice, AQL 2.5 means fewer than 1 in 40 garments shipped will have a defect a customer would notice.
- Critical defects (safety risk) — AQL 0 or 0.065. Zero tolerance. A needle left in a garment is a critical defect
- Major defects (affect function or appearance) — AQL 2.5. Standard garment industry. Broken zip, wrong measurement, seam failure
- Minor defects (cosmetic only) — AQL 4.0. Loose thread, very slight shade variation that does not affect appearance in use
How to use the AQL calculator: enter your lot size (total pieces in the shipment), select General Inspection Level II (the default for most garment orders), and select AQL 2.5 for major defects. The calculator returns a code letter, a sample size, and an accept/reject number. If the number of major defects found in the sample meets or exceeds the reject number, the entire batch fails and must be reworked.
SDF Clothing applies AQL 2.5 in-house on every order before packing. Third-party inspection by SGS, Bureau Veritas, or Intertek is available on request at the buyer's cost.
GSM — Fabric Weight and Why It Matters in Every Tech Pack
GSM (Grams per Square Metre) is the international standard measure of fabric weight used in Bangladesh, Europe, China, and most manufacturing countries. The United States uses oz/yd² (ounces per square yard). Getting GSM wrong in a tech pack — or failing to convert correctly between units — is one of the most common causes of fabric weight disputes in production.
The conversion formula: GSM ÷ 33.906 = oz/yd². The reverse: oz/yd² × 33.906 = GSM.
- Lightweight T-shirt — 140–160 GSM (4.1–4.7 oz). Breathable, drapes well, lower price point
- Standard retail T-shirt — 170–200 GSM (5–5.9 oz). Most common for fashion and branded basics
- Heavyweight streetwear T-shirt — 220–260 GSM (6.5–7.7 oz). Substantial feel, higher price point, structured silhouette
- Standard hoodie (French terry or fleece) — 300–340 GSM (8.8–10 oz). Most common retail hoodie weight
- Heavyweight hoodie (brushed fleece) — 380–420 GSM (11.2–12.4 oz). Premium streetwear and workwear
- Polo shirt (piqué) — 200–220 GSM (5.9–6.5 oz). Standard for sportswear and corporate wear
Always specify GSM in your tech pack. Do not leave it blank and expect the factory to choose. The factory will choose the cheapest available option for the specified fabric type — which may be significantly lighter or heavier than you expected.
EU Compliance for Clothing Brands in 2026 — What Has Changed
Three EU regulations are reshaping what clothing brands must demonstrate from 2026 onwards. The EU Readiness Checker on this page covers all three.
General Product Safety Regulation (GPSR) — Effective December 2024
GPSR replaced the General Product Safety Directive and extended obligations to online marketplaces and remote sellers. For clothing brands, it requires a named Responsible Person within the EU for all non-EU manufacturers, product safety documentation, and a clear process for handling safety issues. Non-compliance can result in products being removed from EU marketplaces.
EU Digital Product Passport (DPP) — Phasing In from 2027
The DPP is mandated under the Ecodesign for Sustainable Products Regulation (ESPR). For textiles, it will require brands to attach a digital record to every product covering: materials and their origin, production location, certifications held, carbon footprint data, repairability score, and end-of-life guidance. The Delegated Acts defining exact textile DPP requirements are expected in 2027. Brands sourcing from GOTS, GRS, and OEKO-TEX certified manufacturers like SDF are already well-positioned — these certifications cover most DPP data requirements.
EU Green Claims Directive
From 2026, brands cannot make environmental claims on products sold in the EU without third-party certification backing each claim. "Sustainable", "eco-friendly", "organic", and "natural" without a certificate are non-compliant under this directive. GOTS, GRS, OEKO-TEX, and OCS — all held by SDF — are specifically recognised under the Green Claims Directive as acceptable evidence.
Care Label Requirements — EU, USA, and Australia
Care labels are legally required in the EU, USA, and most major markets. Errors on care labels lead to product recalls, retailer chargebacks, and customs holds.
- European Union — ISO 3758 / GINETEX symbols required on all garments. Five symbols in sequence: washing → bleaching → drying → ironing → professional care. Must be permanently attached and legible through the garment's useful life. An X through any symbol means "do not."
- United States — FTC Care Labeling Rule requires written care instructions in English. Symbols alone without text are not sufficient for US compliance. Both washing and drying instructions must be provided.
- Australia — ISO 3758 symbols accepted. Must be permanently attached and remain legible after multiple care cycles.
- Japan — Uses JIS L0001 standard, which has some differences from ISO 3758. Confirm symbol requirements if exporting to Japan.
SDF Clothing produces care labels in any language required for your destination market as part of standard production. The Wash Care Label Generator on this page generates the correct ISO 3758 symbol sequence for your fabric and construction.
HS Codes for Clothing Imports — The Essential Reference
Every garment imported internationally must be classified under an HS (Harmonised System) code. The correct classification determines your duty rate, whether you can claim preferential duty-free access for Bangladesh origin goods, and compliance documentation requirements.
- T-shirts (knitted) — HS 6109. Men's, women's, and children's subheadings exist
- Hoodies, sweatshirts, and jumpers (knitted) — HS 6110
- Men's woven trousers — HS 6203. Women's — HS 6204
- Woven shirts — men's HS 6205, women's HS 6206
- Men's woven jackets — HS 6201. Women's — HS 6202
- Woven suits — HS 6203 (men's), HS 6204 (women's)
For EU buyers importing from Bangladesh: the correct HS code is essential for claiming EU GSP duty-free access, which reduces duties by 0–12% depending on the code. For UK buyers: UK DCTS Enhanced Preferences apply. For US buyers: the correct classification avoids misclassification penalties, which the US CBP enforces actively. Always verify with a licensed customs broker for your specific destination.
Related Manufacturing Resources
- Clothing Manufacturers — MOQ guide, production models, AQL inspection, FOB pricing explained
- Apparel Manufacturers — Compliance by market, EU regulatory requirements 2026, certification table
- Garments Manufacturers — GSM reference guide, trade duty advantages by country, certification verification
- Fashion Manufacturers — Tech pack guide, brand claims by certification, sampling process
- Our 13 Certifications — GOTS, OEKO-TEX, ISO 9001, BSCI, and 9 more — all with verification links
- Get a Free Quote — FOB quote within 48 hours. MOQ 300 pieces per style
Frequently Asked Questions
What is an AQL calculator and how do I use it?
An AQL calculator tells you how many garments to inspect (sample size) and how many defects are allowable before rejection (accept/reject number). Enter your lot size and inspection level — AQL 2.5, General Level II is the standard for most garment pre-shipment inspections. The result: a code letter, a sample size, and the maximum allowable defects before the batch fails. If defects found equal or exceed the reject number, the batch must be reworked and re-inspected.
How do I convert GSM to ounces?
Divide GSM by 33.906 to get oz/yd². Multiply oz/yd² by 33.906 to get GSM. Example: 300 GSM ÷ 33.906 = 8.85 oz/yd². This formula applies to all fabric types regardless of composition. GSM is the global standard; oz/yd² is primarily used in the United States. Always confirm which unit your supplier is quoting in before comparing fabric weights across suppliers.
What does the EU Digital Product Passport mean for my clothing brand?
The DPP will require a digital record attached to every garment sold in the EU — covering materials, production location, certifications, and end-of-life data. Exact textile requirements are expected via Delegated Acts in 2027. Brands sourcing from GOTS, GRS, and OEKO-TEX certified manufacturers are well-positioned — these certifications cover most DPP data points. Use our EU Readiness Checker to assess your current position across all three relevant EU regulations.
What care label symbols are required in the EU?
ISO 3758 / GINETEX symbols in this sequence: washing → bleaching → drying → ironing → professional care. Permanently attached, legible, in the language of the sale country. An X through a symbol means "do not." Numbers in the wash tub indicate maximum temperature in °C. One bar below = gentle cycle, two bars = very gentle. Use our free Wash Care Label Generator to get the correct sequence for your fabric and construction.
Are these tools really free?
Yes. All 14 tools are free with no signup, no email required, and no usage limits. No data entered into these tools is stored or shared. They run entirely in your browser. You do not need to be an SDF client to use them.
Can I use these tools if I am not sourcing from Bangladesh?
Yes. The AQL Calculator, GSM Converter, Shrinkage Calculator, Wash Care Label Generator, and HS Code Finder are universal — applicable to any sourcing country. The Garment Cost Calculator includes Bangladesh, China, and Vietnam cost comparisons. The EU Readiness Checker is relevant regardless of where you manufacture.