Woven fabric consumption formula.

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Before calculate the woven fabric consumption, you must need the followings information as mentioned below:

1) Measurement chart with technical spec.
2) Style Description.
3) Fabric Description.
4) Fabrics width/weight.
5) Washing shrinkage if any.


This formula is as under :
Formula = Length  X Width  / Fab width X Fab Unit

Here, 

Length = length of the specific parts + allowance

Width  = width  of the specific parts + allowance

Fab width = Fabric width ( after considering the shrinkage 

                    allowance).

                   Say, fabric width is 45" & the shrinkage 

                   allowance is 1", Then the Fabric width will 

                   be (45"-1") = 44" in the formula.

Fab unit = Fabric calculation unit, here it will be 36 because 

                we are going to calculate the consumption in 

                Yards.

Now we will calculate the consumption of a Shirt (front part)

Center front length  = 32"+1" (Sewing allowance) = 33"

Width (Chest)        = 24" + 1" (Sewing allowance) + 3" 

                                 Pleat.W (1.5X2)  = 28"

= Length  X Width  / Fab width X Fab Unit

= 33" X 28" /  44" X 36"

= 924" / 1584"

= 0.5833333

= 0.59 Yards. (for front part)

Calculate the consumption of knit garments

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(During the consumption pls used measurement of middle size for calculation or used the size which have most of the qty. If the style have 6 sizes then used size number 04 for consumption. Here we will consider the size: "L" for calculate the consumption) 

i. Body length of the garments in cm. Say it is - 73 cm

ii. Sleeve length of the garments in cm. Say it is - 19.5 cm

iii. Approximate sewing allowance at body hem, shoulder joint, sleeve hem & armhole joint (in cm). Say it is - 10 cm 

iv. Chest width (1/2) in cm. Say it is - 52 cm

v. Approximate sewing allowance at both side seam (in cm). Say it is - 4 cm  

vi. Fabric GSM (finish). Say it is - 160 gsm 

vii. Approximate fabric wastage in various stage. Say it is - 10% 

(In this regards pls note that, fabric wastage depend on how many additional elements the garments have,which may changed in any time.If the garments has rotary print, enzyme stone wash etc than the fabric wastage will be more than normal wastage)

If you already have all the above information then,now just put the following information and get the fabric consumption.http://knitgarmentsconsumption.blogspot.com/ otherwise you can follow the below rules

Rules: 
{(B/length + S/length + Sewing Allowance) X (1/2 Chest + Sewing Allowance)}X 2 X GSM X 12 / 10000000 + Wastage

= {(73 + 19.5 + 10) X (52 + 4)} X 2 X 160 X 12 / 10000000 + 10%

=  (102.5 X 56) X 2 X 160 X 12 / 10000000 + 10%

= 5740 X 2 X 160 X 12 /10000000 +10%

= 22041600 / 10000000 + 10%

= 2.20416 + 10 %

= 2.424576

= 2.43 kg per dozen. (Consumption)

Sweater Consumption & costing

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Seeking your permission for allow me to share the answer of Mr. Rahman's Question . if i make any mistake pls correct it .


Sweater don’t have solid or finished fabric like Woven & knit item, by linking one yarn with another the shape of the different part of sweater is made. so that there is no such consumption formula for sweater like knit & woven item . 

For costing of sweater, we need to make a sample first as per customer required style, measurement & weight. It is wise to make the sample following the middle size of customer spec. Then weight that sweater & multiply the weight with 12 pcs to know the weight of per dozen sweater. Then add wastage percentage (Generally we calculate 10-20% wastage based on styling). This way we can found the sweater consumption 

In the view of above the sweater costing formula will be like as below…….

= Yarn weight (in LBS / dzn Garments ) + wastage X price of yarn /lbs 

= Result of usable total yarn  cost

Costing :- 

1.              Yarn :- Total usable Yarn cost/dzn 

2.              Add total Accessories cost /dz 

3.              Add Print/Emb.(If any) / dz 

4.              Add Zipper cost (If any) / dz

5.             Add Button cost (If any) / dz

6.             Add CM (CM based on styling and gauge) /dz

7.             Add Commercial cost / dz

8.             Add Profit /dz

Then divided the price / 12 Pcs & you will get price / pc 

Example: -

Say, 

Weight of following sweater is 8 lbs/ doz (12 GG basic Style)

Wastage is 12% of total weight = 0.96 lbs / doz

Yarn price is $4 /lbs

Basic Accessories cost is: $5 / doz

Print cost: $ 0.65 / doz

Zipper + button cost: $1 / doz

CM : $28 / doz

Commercial cost: $2 / doz

Now the costing formula will be 

= (Total usable yarn in lbs + 12% wastage) X Yarn price/lbs + Accessories cost + Print cost + Zipper & button cost + CM + Commercial cost

= (8 lbs + 0.96 lbs) X $4 + $5 + $0.65 + $1 + $28 + $2

= 8.96 lbs X $4 + $5 + $0.65 + $1 + $28 + $2

= $35.84 + $5 + $0.65 + $1 + $28 + $2

= $ 72.49 / dozen

Then divided by 12,   

$ 72.49 /12 Pcs  

$ 6.04/pc FOB.