This page teaches a buyer, merchandiser or planner how to calculate a whole order's total fabric cost, starting from the fabric's own price per unit and its total consumption. It is for anyone who checks a fabric cost figure before approving a purchase order, and no previous lesson is needed, though it reuses the total consumption figures lesson 3.1 already worked out. This mainly teaches the money flow of an order: turning a quoted price and a calculated quantity into the one figure that decides how much a mill is paid.
At work, a buyer cannot approve a fabric cost on the strength of a price and a quantity sitting separately on the page. The two must be multiplied correctly, in the same unit, before the result means anything. Without this skill, a buyer risks approving a cost built from a price quoted per kilogram multiplied against a quantity measured in metres, producing a number with no real meaning.
The figures used here are already fixed: Order A's own fabric price and Order B's own denim price, alongside the consumption figures lesson 3.1 already calculated. The new skill is the multiplication that turns a price and a consumption figure into a total cost, and the check that keeps it valid: matching the price's unit to the consumption's unit before multiplying.
You need: lesson 3.1's total consumption figures (Order A 3,075 kg, Order B's denim 4,350 m); they are restated here, so reading 3.1 first helps but is not required.
By the end of this lesson you can:
Not covered here: how a fabric's per-piece consumption is first calculated (lesson 3.1), converting a fabric's weight between GSM and oz/yd2 (lesson 3.2), combining a full fabric requirement and cost calculation in one pass for a new order (lesson 3.6).
| Term | Meaning |
|---|---|
| Fabric cost | The cost of the fabric used in one garment, driven by fabric price per kilogram and consumption per piece. |
| Fabric price | The price a mill charges for fabric, quoted per kilogram for a knit or per metre for a woven; it must be multiplied only against a consumption figure stated in the same unit. |
| Fabric consumption | The amount of fabric, by weight or length, one garment piece uses; the basis for calculating an order's total fabric requirement. |
| Purchase order | A document from a buyer confirming quantity, price and delivery date, which commits the buyer to pay for the goods it orders. |
| Formula | An instruction in a spreadsheet cell that calculates a value from other cells, instead of a value typed in by hand. |
A fabric's total cost for an order is always the same one-step calculation: the price the mill charges per unit, multiplied by the order's total consumption in that same unit. Order A's fabric price is already fixed at USD 5.60 per kg, and lesson 3.1 already fixed Order A's total consumption at 3,075 kg, so its total fabric cost is 3,075 kg multiplied by USD 5.60 per kg. Order B's denim price is already fixed at USD 3.20 per metre, and lesson 3.1 already fixed Order B's total consumption at 4,350 m, so its total fabric cost is 4,350 m multiplied by USD 3.20 per metre. Neither total is ever typed by hand on this course's fabric calculator; both are live formulas that recalculate themselves if either the price or the consumption figure changes.
What you meet in real life| What can differ | The shapes you meet | Why it matters |
|---|---|---|
| Order A's fabric cost (weight-based) | 3,075 kg at USD 5.60 per kg | Multiplying a knit fabric's total weight by its price per kg gives the order's total fabric cost in dollars. |
| Order B's denim fabric cost (length-based) | 4,350 m at USD 3.20 per metre | Multiplying a woven denim fabric's total length by its price per metre gives the order's total fabric cost in dollars, using a different unit from a knit fabric's calculation. |
| Matching the price unit to the consumption unit | A price quoted per kg multiplied only against a quantity in kg, never against a quantity in metres, and the same the other way round | Multiplying mismatched units produces a fabric cost figure with no real meaning, even though the calculator still returns a number. |
| Fabric cost as one part of a garment's full cost | Fabric cost is one of five cost components in a garment's costing sheet (fabric, trims, making, overhead, profit; Course 7), not the whole price | This lesson isolates the fabric-cost calculation; the full costing sheet still needs trims, making, overhead and profit added to it. |
| Related product families | Socks and hosiery (usually weight-based, priced per kg like a knit), terry towels and home-textile bedding (often length-based, priced per metre like a woven) | The same price-times-consumption method, and the same unit-matching check, apply outside apparel as well. |
Sara, the buyer at Northline Apparel, must confirm Order A's total fabric cost before she approves the purchase order Delta Garments plans to send to Rowad Knits, the knitting mill. Order A is an export order under a Make to Order arrangement: production has not started, and Sara is checking the figure before, not after, committing to it. The specification line she reads states the fabric price per kg and the total consumption in kg, both already fixed figures reused from lesson 3.1.
Sara cannot approve the purchase order on the strength of the price alone, or the consumption figure alone. She needs the one multiplication that turns both into the dollar amount Rowad Knits will actually invoice Delta Garments for, and Delta Garments will in turn build into the cost it charges Northline Apparel. Getting this number right before approval is far cheaper than discovering it was wrong after the fabric has already been ordered and dyed.
The worked numberOrder A's own fixed figures: 3,075 kg of fabric, already fixed in lesson 3.1, multiplied by its own fixed price of USD 5.60 per kg.
Order B's own fixed figures: 4,350 m of denim, already fixed in lesson 3.1, multiplied by its own fixed price of USD 3.20 per metre.
Order A's total fabric cost is USD 17,220; Order B's total denim fabric cost is USD 13,920. Both totals are already-fixed figures reused here, calculated live on this course's fabric calculator rather than typed in by hand.
A common mistake is multiplying Order A's per-kg fabric price against Order B's metre-based consumption figure, or any other pairing of a price and a quantity that are not stated in the same unit. Order A's fabric is priced at USD 5.60 per kg because it is a knit, weighed and bought by weight; Order B's denim is priced at USD 3.20 per metre because it is a woven, cut and bought by length. Multiplying either price against the other order's consumption produces a dollar figure that the calculator will still display, but that figure describes nothing real.
This mistake is easy to make because both a price and a consumption figure are just numbers on a spec sheet, and nothing about typing them into a calculator stops a mismatched pair from being multiplied. The safeguard is simple: before multiplying, check that the price's own unit, per kg or per metre, matches the consumption figure's own unit, and treat a mismatch as a reason to stop and check the source documents rather than accept whatever number the calculator returns.
This lesson shows how to work out how much a whole order's fabric costs in money. A fabric has a price for one unit, either one kilogram or one metre, and an order needs a certain total amount of that fabric, already worked out in an earlier lesson. Multiplying the price for one unit by the total amount needed gives the whole order's fabric cost. The one thing to check before multiplying is that the price and the amount use the same unit: a price for one kilogram must be multiplied by an amount in kilograms, never by an amount in metres, and the same the other way round. Getting this wrong gives a number that looks like an answer but means nothing.
Sara, Northline Apparel's buyer, must confirm Order A's total fabric cost before approving the purchase order Delta Garments plans to send to Rowad Knits, the knitting mill.
What is Order A's total fabric cost? Decide before opening the answer.
Order A's total fabric cost is USD 17,220, from 3,075 kg multiplied by USD 5.60 per kg. Two facts decide this: the fabric's price is quoted per kilogram, and the consumption figure is also stated in kilograms, so the two units match and the multiplication is valid. Had Sara instead multiplied the USD 5.60 per kg price against a metre-based figure, the result would look like a dollar amount but would not describe Order A's real fabric cost at all.
Multiplying a fabric price against a consumption figure in the wrong unit can produce a fabric cost estimate that is wrong by a large, unpredictable amount, since the two numbers being multiplied no longer describe the same real quantity. Order A's own profit is USD 0.26 per piece, or a fixed total across the whole 15,000-piece order.
A mis-matched-unit fabric cost error does not need to be large in percentage terms to wipe out that USD 3,900 of profit; multiplying Order A's own USD 5.60 per kg price against Order B's 4,350 m denim consumption figure by mistake, for example, produces a meaningless USD 24,360 figure that has no connection to any real quantity Delta Garments actually buys, a difference of well over USD 10,000 from Order B's own correct USD 13,920 denim fabric cost. A buyer who approves a purchase order on the strength of a mismatched-unit figure risks signing off a cost that is simply wrong, with no warning from the calculator itself.
The fabric calculator (this course's workbook) holds the total-fabric-cost row worked through in this lesson, alongside the total-consumption rows from lesson 3.1. Enter a price per unit and a total consumption figure in the yellow input cells, in matching units, and the white result cell recalculates the total fabric cost automatically, as a live formula.
| Question | Order A (filled in) | Order B, denim (filled in) | Your order |
|---|---|---|---|
| Fabric price per unit | USD 5.60 per kg | USD 3.20 per metre | |
| Total consumption (lesson 3.1) | 3,075 kg | 4,350 m | |
| Units match? | Yes, both in kg | Yes, both in metres | |
| Total fabric cost | USD 17,220 | USD 13,920 |
Download the fabric calculator from the course page and fill in your own order's price and consumption figures in the fourth column, checking that both use the same unit before you read the result.
1. What is Order A's total fabric cost, given 3,075 kg at USD 5.60 per kg?
2. What is Order B's total denim fabric cost, given 4,350 m at USD 3.20 per metre?
3. Why must a fabric price's unit (per kg or per metre) match the consumption figure's unit before multiplying them?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Fabric cost | تكلفة القماش | Coût du tissu | Kumaş maliyeti | The cost of the fabric used in one garment, driven by fabric price per kilogram and consumption per piece. |
| Fabric price | سعر القماش | Prix du tissu | Kumaş fiyatı | The price a mill charges for fabric, quoted per kilogram for a knit or per metre for a woven; it must be multiplied only against a consumption figure stated in the same unit. |
| Fabric consumption | استهلاك القماش | Consommation de tissu | Kumaş tüketimi | The amount of fabric, by weight or length, one garment piece uses; the basis for calculating an order's total fabric requirement. |
| Purchase order | أمر الشراء (طلبية الشراء) | Bon de commande | Satın alma siparişi | A document from a buyer confirming quantity, price and delivery date, which commits the buyer to pay for the goods it orders. |
| Formula | صيغة حسابية | Formule | Formül | An instruction in a spreadsheet cell that calculates a value from other cells, instead of a value typed in by hand. |
You can now calculate a whole order's fabric cost from its price and its consumption. The next lesson combines every step of this course into one pass: finding a fabric's total requirement and its total cost for an order, start to finish, on the fabric calculator. Back to the course map