This page explains how to calculate marker efficiency and fabric wastage from a marker's own fixed figures, for anyone who plans or checks how much fabric an order actually needs: a merchandiser, a production planner, a mill employee confirming a fabric order, or a new entrant to the trade. This lesson teaches product flow: a marker's own wastage figure decides exactly how much fabric a mill must cut, dye and deliver before an order can be complete.
Every marker leaves some fabric unused, lost to the gaps between pattern pieces and to the fabric's own edges. That lost fabric has a name, marker wastage, and a fixed percentage for Order A's own marker: 7%. Knowing this number, and its standard-industry complement, marker efficiency, lets anyone confirm exactly how much fabric a whole order needs.
Without this skill, a person calculating a fabric requirement can make the exact mistake this lesson exists to prevent: adding the wastage percentage a second time, on top of a fabric figure that already includes it. That double-counting overstates how much fabric the order needs, ties up money in fabric never used, and can delay a mill's own delivery while it sources fabric nobody actually ordered.
You need: this course's earlier lessons on what a pattern is (T05-C03-L01), grading a pattern (T05-C03-L02), and what a marker is (T05-C03-L03); no other lesson is required.
By the end of this lesson you can:
Not covered here: how a marker is actually laid out on fabric (lesson T05-C03-L03, already covered); grading a pattern across a size range (lesson T05-C03-L02, already covered); building the full marker-planning worksheet for a whole order (lesson T05-C03-L05).
| Term | Meaning |
|---|---|
| Marker | The layout of all pattern pieces for a size, or a set of sizes, arranged on fabric width, used to cut fabric with the least possible waste. |
| Marker wastage | Fabric lost during cutting because pattern pieces never fill a cutting layout perfectly; a separate allowance from combing waste. |
| Marker efficiency | The percentage of fabric in a marker actually used for pattern pieces, the standard-industry complement of marker wastage. |
| Fabric consumption | The amount of fabric, by weight or length, that one garment piece uses, the basis for calculating an order's total fabric requirement. |
| Total fabric requirement | The full quantity of fabric an order needs, calculated from per-piece consumption multiplied by the order's quantity. |
Marker wastage is the percentage of fabric in a marker that is not used for any pattern piece, lost to the gaps between pieces and to the fabric's own edges. Marker efficiency is the standard-industry complement of wastage: efficiency equals 100% minus wastage%. Order A's own fixed fact states that its fabric is 0.205 kg per piece, "including 7% marker wastage." Applying the standard formula, 100% minus 7% equals 93% marker efficiency for Order A's own marker, a real, fixed figure for this academy's own reference order, not a new number invented for this lesson. Total fabric needed for a whole order is the fabric-per-piece figure, already including wastage, multiplied by the order's own quantity. This one multiplication is the entire calculation a merchandiser, a mill or a production planner needs to confirm a fabric requirement, provided the per-piece figure they start from already accounts for wastage.
| What can differ | The shapes you meet | Why it matters |
|---|---|---|
| Order A's own marker | 7% wastage, 93% efficiency, a real, fixed reference case for this academy | Confirms exactly how much fabric Order A's own batch needs, with no guesswork |
| A tighter, better-nested marker | Lower wastage than 7%, higher efficiency, less fabric consumed per piece; illustrative, not a fixed cast figure | Shows the direction a better pattern layout moves fabric cost |
| A looser, poorly-nested marker | Higher wastage than 7%, lower efficiency, more fabric consumed per piece; illustrative, not a fixed cast figure | Shows the direction a poor pattern layout moves fabric cost |
| Multi-size markers compared with single-size markers | A well-planned multi-size marker can sometimes nest pieces more efficiently than several single-size markers run separately; a general principle, not a fixed cast figure | Affects whether a factory decides to cut sizes together or apart |
| Export orders compared with domestic orders | The same efficiency formula applies to Order A's own export batch and to any domestic order; only the fabric's cost consequence differs by market | Confirms marker efficiency is a general rule, not something only export orders use |
Rowad Knits, the knitting mill supplying knit fabric for a hybrid MTO/MTS export batch of Order A's T-shirts made by Delta Garments, is asked to confirm exactly how much fabric this batch requires before it commits its own knitting capacity to the order. Rowad Knits does not need to invent a new wastage figure for this batch: Order A's own marker already has a fixed 7% marker wastage and 93% marker efficiency, and its fabric is already fixed at 0.205 kg per piece including that wastage. Rowad Knits' own job is to apply the batch's quantity, 15,000 pieces, to that already-fixed per-piece figure, not to recalculate wastage from scratch, and not to guess at a different wastage percentage of its own.
The worked numberOrder A's own fixed figures are: 7% marker wastage, 93% marker efficiency, 0.205 kg fabric per piece including that wastage, and 15,000 pieces in the batch.
This total, 3,075 kg, matches Order A's own fixed total fabric figure exactly, confirming the calculation is consistent with the master figures Rowad Knits and Delta Garments both already use.
A common mistake is calculating total fabric from Order A's own 0.205 kg per-piece figure, then adding another 7% "for marker wastage" on top, as though that figure never included wastage in the first place. Order A's own fixed definition already states its fabric is 0.205 kg per piece "including 7% marker wastage," so multiplying that figure by 15,000 pieces already gives the correct total, 3,075 kg. Adding a second 7% on top double-counts the same wastage and overstates the batch's fabric requirement by roughly 215 kg, at a real cost in fabric purchasing budget and warehouse space for fabric the order never actually needs. The fix is simple once the trap is named: read the per-piece figure's own definition first, and only add a wastage allowance on top when a figure explicitly says wastage is not yet included.
Cutting fabric for a T-shirt never uses every last bit of it. Some fabric is always left between the shapes as they are cut, and some is lost at the fabric's own edges. For Order A's T-shirts, this lost fabric is a fixed 7 out of every 100, which means 93 out of every 100 is actually used. To know how much fabric a whole batch needs, take the fabric each piece uses, which already includes this loss, and multiply it by how many pieces are being made: 0.205 kilograms times 15,000 pieces comes to 3,075 kilograms. Adding the loss a second time is wrong, because it was already counted the first time, and it makes the batch look like it needs more fabric than it really does.
The facts in front of the merchandiser:
The document the merchandiser attaches to the purchase order:
Is the merchandiser's calculation correct? Decide before you open the answer.
No. The merchandiser's own 0.205 kg per-piece figure already includes the 7% marker wastage, by its own fixed definition; multiplying it by 15,000 pieces already gives the correct total, 3,075 kg.
Two facts, together, decide this. First, Order A's fabric is fixed at "0.205 kg per piece including 7% marker wastage" — the wastage is already inside that number. Second, this lesson's own trap: adding another 7% on top of a figure that already includes wastage counts the same loss twice.
Ordering 3,290 kg instead of 3,075 kg buys about 215 kg of fabric the batch does not need, at Order A's own fixed fabric price of USD 5.60 per kilogram: roughly USD 1,205 tied up in fabric that would sit unused in the warehouse.
That USD 1,205.40 is money tied up in fabric the batch never needed, sitting in a warehouse instead of paying for the order's real costs. Weighed against Order A's own total order profit, USD 3,900, this one calculation error costs close to a third of the whole order's profit, about 31%, before a single extra piece is made. Checking the calculation against the marker's own fixed figures costs only a few minutes; skipping that check costs real money.
Copy this table into the Marker-planning worksheet. Fill each row from Order A's figures, then reuse the same formulas for any other order.
| Calculation | Input A | Input B | Result | Notes |
|---|---|---|---|---|
| Marker wastage percent (Order A's own fixed figure) | 7 | 7 | Order A's fabric is fixed at 0.205 kg per piece including 7% marker wastage | |
| Marker efficiency percent (100 minus wastage) | 100 | 7 | 93 | Standard-industry complement of wastage; Order A's own marker is 93% efficient |
| Fabric used per piece including wastage (Order A's own figure) | 0.205 | 0.205 | kg per piece, fixed in the master figures | |
| Fabric needed for the whole order (Order A's own 15,000 pieces) | 0.205 | 15000 | 3075 | kg; matches Order A's own fixed 3,075 kg figure |
Download the full working sheet from the link on this course's page.
1. What is the formula for marker efficiency?
2. A different marker, for another product, has 10% marker wastage. What is its marker efficiency?
3. Order A's fabric is fixed at 0.205 kg per piece including 7% marker wastage. Why is adding another 7% on top of this figure for a 15,000-piece batch incorrect?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Marker | الماركر | Placement | Pastal | The layout of all pattern pieces for a size, or a set of sizes, arranged on fabric width, used to cut fabric with the least possible waste. |
| Marker wastage | فاقد الماركر | Perte de placement (marker) | Marker firesi | Fabric lost during cutting because pattern pieces never fill a cutting layout perfectly; a separate allowance from combing waste. |
| Marker efficiency | كفاءة الماركر | Efficacité du placement | Pastal verimliliği | The percentage of fabric in a marker actually used for pattern pieces, the standard-industry complement of marker wastage. |
| Fabric consumption | استهلاك القماش | Consommation de tissu | Kumaş tüketimi | The amount of fabric, by weight or length, that one garment piece uses, the basis for calculating an order's total fabric requirement. |
| Total fabric requirement | إجمالي احتياج القماش | Besoin total en tissu | Toplam kumaş ihtiyacı | The full quantity of fabric an order needs, calculated from per-piece consumption multiplied by the order's quantity. |
You now know how to calculate marker efficiency and a whole order's fabric requirement from a marker's own fixed figures. The next lesson brings every figure from this course together in one working marker-planning worksheet, built for a real order. Back to the course map