How to Calculate Bedding Fabric Order Quantity: Usable Width, Repeat, Nap & Cutting Allowance
Compartir
Calculate bedding-fabric order quantity from a confirmed cutting marker—not from finished-product area alone. Start with finished sizes and seam details, convert them to cut dimensions, apply verified dimensional-change data, lay the pieces within the fabric’s usable width, account for pattern repeat and one-way direction, and then add only documented allowances for cutting, roll ends, defects, sampling and replacement. Nominal roll width, quoted GSM and an arbitrary waste percentage cannot produce a reliable order quantity.
This B2B guide helps bedding brands, importers, manufacturers and wholesalers prepare a quantity brief for Nantong Oulai or another fabric supplier. It complements, rather than repeats, the existing guides to 108-inch extra-wide cotton, fabric GSM and pre-shipment roll inspection.
Why is finished-product area not enough?
Two duvet covers with the same finished area can consume different fabric lengths. The result changes with usable width, whether panels can be placed side by side, seam and hem construction, print repeat, motif placement, nap direction, dimensional change, roll defects and marker efficiency.
For example, extra-wide fabric may permit a seamless king-size panel, while a narrower fabric may require joined panels. A large directional repeat may force every cut piece to start at a matching point. A pile fabric may require all pieces to face one direction. These are layout constraints, not fiber-performance claims.
Which inputs should buyers collect before calculating metres?
| Input | What to specify | Why it changes quantity |
|---|---|---|
| Finished product | Size, component list, seam, hem, closure and panel strategy | Converts sellable size into cut-piece dimensions |
| Usable width | Minimum accepted usable width, excluding unusable edges | Determines how many pieces fit across the roll |
| Dimensional change | Lengthwise and widthwise results under the agreed care procedure | May require pattern compensation before cutting |
| Pattern repeat | Vertical and horizontal repeat, motif orientation and matching rule | Can force pieces to advance to the next repeat |
| Nap/direction | One-way or two-way cutting permission | Restricts rotation and nesting |
| Marker | Approved piece placement and marker length per size/style | Provides the main consumption value |
| Roll data | Actual roll lengths, shade groups and defect map | Affects spreading, joins and replacement planning |
| Fixed needs | Samples, testing, pilot sewing and retained material | Should be added as fixed metres, not hidden in waste |
What is the difference between nominal width and usable width?
Nominal width is a commercial description. Usable width is the portion available for conforming cut pieces after excluding unacceptable selvage or edge areas. ASTM D3774 covers measurement of fabric width, usable width or both and can be applied to full rolls or specimens.
Put the required minimum usable width and measurement method in the RFQ. A fabric described as “108 inches wide” still needs an agreed usable-width requirement if the marker depends on a seamless panel. Nantong Oulai’s active FAB-0109 108-inch extra-wide 100% cotton solid-dyed fabric is listed for king duvet covers, wide sheets and large bedding panels; buyers should confirm the ordered weave, finish, target weight and usable-width tolerance for the exact development.
How do you build the calculation?
- Create the component list. Include every front, back, flange, band, facing, closure part and pillowcase piece.
- Convert finished size to cut size. Add the approved seam, hem, turnover and closure requirements.
- Compensate from verified data. If the production route requires pre-cut dimensional-change compensation, use lengthwise and widthwise results from the agreed finished fabric and care procedure.
- Apply pattern rules. Define repeat, motif centering, matching between panels and acceptable placement zones.
- Apply directional rules. Decide whether pieces may rotate. Pile, sheen or a one-way print can require one-way cutting.
- Make the marker. Nest every cut piece within the minimum usable width and calculate marker length for each size/style.
- Scale by order quantity. Multiply approved marker consumption by units, then add separately justified variable and fixed allowances.
A practical structure is:
Order metres = approved marker metres for saleable units + justified variable allowances + fixed development/testing metres.
If an allowance is applied as a percentage, state its basis. Do not use one percentage to hide shrinkage, defects, sampling and cutting loss. Dimensional compensation belongs in cut-piece or marker development; defect replacement should reflect the agreed inspection and roll-quality basis; sample metres are a fixed requirement.
How does pattern repeat change marker length?
When a cut line must align to a design repeat, the next piece may not start immediately after the preceding piece. The start position may need to advance to the next complete vertical repeat. Horizontal repeat can also restrict side-by-side placement, especially when motifs must align across a duvet front or paired pillowcases.
Ask for:
- Measured vertical and horizontal repeat on the approved production construction
- Artwork version and motif orientation
- Whether matching is required between front/back panels or paired products
- Allowed motif-placement tolerance
- A marker or consumption estimate based on the approved repeat—not the artwork file alone
Printed fabric can distort or change slightly through finishing, so confirm repeat on the finished sample used for marker approval.
Why does nap or pile direction matter?
On pile fabrics, brushed surfaces and some lustrous constructions, rotating a panel can produce a visibly different light reflection or hand direction. A one-way marker keeps all pieces aligned but usually reduces nesting freedom. The same concern can apply to directional prints even when the surface has no pile.
Nantong Oulai’s active FAB-0513 printed polyester coral velvet is listed for blankets, throws and bedding applications. For quantity planning, confirm pile direction, print repeat and whether every visible component must face the same way. Product-specific print and pile checkpoints are covered in the printed coral-velvet sourcing guide.
Does jacquard require different planning?
A woven jacquard may not have printed artwork, but it can still have a directional woven motif, repeat and visible face. Nantong Oulai’s active FAB-0112 100% cotton woven jacquard is listed for bedding sets, duvet covers and pillowcases. The RFQ should define the pattern, color, usable width, weight, finish and placement expectations for the exact order.
Do not assume that a smaller motif always produces better yield. Marker efficiency depends on component sizes, repeat geometry, direction rules and usable width together.
How should dimensional change enter the calculation?
Use results from the exact finished fabric and the care procedure relevant to the product. ISO 3759 covers preparing, marking and measuring specimens; ISO 6330 defines domestic washing and drying procedures for textile testing; ISO 5077 covers determination of dimensional change from the measurements.
Record lengthwise and widthwise behavior separately. If a buyer needs a specified after-wash finished size, pattern compensation must be technically reviewed with sewing and finishing teams. A single generic “shrinkage allowance” applied to total metres can fail to correct piece dimensions.
How should buyers handle defects, roll ends and shade groups?
Use the agreed inspection basis and actual roll information. A defect allowance is not a substitute for an acceptance standard. Defect maps can help the cutting room plan splices or avoid damaged areas; roll-length records show whether a marker can be spread efficiently; shade grouping prevents visually adjacent panels from being mixed.
ASTM D3773/D3773M covers methods for measuring woven-fabric roll length. ASTM D5430 covers visual inspection and grading of fabrics. The parties still need to agree which inspection method, defect classification, point rule and acceptance level apply to the order.
What does an illustrative calculation look like?
Suppose a CAD marker—after the buyer has already built in seam details, verified dimensional compensation, repeat matching and direction rules—uses 5.60 m per set. For 200 sets, the marker requirement is 1,120 m. If the project’s own historical and inspection data justify 5% combined variable allowance, and development/testing requires a fixed 20 m, the illustrative order would be:
1,120 m + 56 m + 20 m = 1,196 m.
These numbers are hypothetical and are not recommended allowance rates. A plain extra-wide construction, a directional jacquard and a printed pile fabric can require very different allowances. Use pilot markers, actual roll data and the agreed quality plan.
What should a cutting-yield RFQ include?
- Finished sizes and complete bill of cut components
- Seam, hem, closure and panel construction
- Fabric composition and construction
- Minimum usable width and measurement method
- Target weight and permitted tolerance
- Lengthwise and widthwise dimensional-change requirements
- Print or weave repeat and motif-placement rules
- One-way/two-way marker permission
- Approved marker length and efficiency record
- Roll-length, shade-group and defect-report requirements
- Fixed sampling/testing quantity
- Separate basis for every variable allowance
Buyer checklist: is the order quantity ready to approve?
- Was the marker built from cut sizes rather than finished dimensions?
- Does it use minimum usable width rather than nominal width?
- Are repeat and motif-matching rules based on the finished sample?
- Is nap or print direction locked?
- Was dimensional compensation based on the agreed wash/dry procedure?
- Are shade groups and roll lengths compatible with the spreading plan?
- Can each allowance be explained and audited?
- Has a pilot marker or sample set been reviewed for a new construction?
Frequently asked questions
Does wider fabric always reduce total cost?
No. Wider fabric can reduce seams or improve panel placement, but cost also depends on price per metre, weight, marker efficiency, finish, logistics and actual usable width.
Should GSM be used to calculate linear metres?
GSM helps estimate fabric mass and can affect cost or freight, but linear metres come from the cutting marker and usable width. Confirm weight using an agreed method such as ASTM D3776/D3776M when required.
Can I use one waste percentage for every bedding fabric?
No. Allowances should come from the exact marker, repeat, direction, roll quality, process route and historical cutting data.
Should shrinkage be added to metres or to the pattern?
Where compensation is required, it normally needs to be reflected in the relevant cut dimensions and marker. The technical team should use verified lengthwise and widthwise results; adding a percentage only to the purchase total does not ensure correct finished dimensions.
What should be measured when rolls arrive?
Verify roll identity, length, usable width, shade group, visible defects and the records specified in the purchase order before releasing fabric to cutting.
Authoritative Sources
- ASTM International, ASTM D3774-18(2024) — Standard Test Method for Width of Textile Fabric.
- ASTM International, ASTM D3773/D3773M-10(2024) — Standard Test Methods for Length of Woven Fabric.
- ASTM International, ASTM D3776/D3776M-20(2025) — Standard Test Methods for Mass Per Unit Area (Weight) of Fabric.
- ASTM International, Textile Standards catalog, including ASTM D5430-26 — Standard Test Methods for Visually Inspecting and Grading Fabrics.
- International Organization for Standardization, ISO 3759:2011 — Preparation, marking and measuring of textile specimens in dimensional-change tests.
- International Organization for Standardization, ISO 6330:2021 — Textiles — Domestic washing and drying procedures for textile testing.
- International Organization for Standardization, ISO 5077:2007 — Textiles — Determination of dimensional change in washing and drying.