Woven fabric consumption formula

Woven fabric consumption formula:

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)

Say we have the bellow measurement of a "Basic Denim long pant" :- 

Inseam = 34 inch, 
½ Thai= 13 inch, 
Back rise (Under West Band) =15 Inch 
Waist band width =1.5 inch, 
Back pocket length = 7 inch, 
Back pocket Width = 6.5 inch
Belt Loop length =1.5 inch, 
Belt Loop Width = 1/2 inch 
Pocket Bag Length = 7.5 inch
Pocket Bag Width = 6.5 inch

The Formula is :- ( Length X Width ) X No of panel / ( Fabric Width X 36 inch ) + Wastage Percentage = Result X12 Pcs

Calculation: - In Here 

Total Bottom Length = Inseam + Back rise + Wbw + Sewing allowance.( Wbw =West band width )
Total Bottom Width = 1/2 Thigh +2“ Sewing allowance 

So, Length = 34+15 + 1.5 *2 +3 = 55 Inch. 
Width = 13 +2 =15 Inch

Say the actual Fabric Width is 58 inch, but when sewing a garments as we can’t use the edge of a fabric , so at the time of calculation we must deduct 1 Inch from the fabric width . I.e. fabric width will be 57 Inch.

Now the Applicable Formula :- ( Length X Thigh ) * 4 part /( Fabric Width X 36 inch) = Result + 5 % Wastage = Result for 1 Pc X12 pcs = Yds / Doz
Based on above information we found 

Main Fabric Consumption :- (55 Inch X 15 Inch) X 4 Pcs /57 inch X 36 Inch + Wastage 5% X 12 Pcs
= 3300 square inch X 2052 square inch + 5% Wastage X12 Pcs 
= 1.61 Yds +0.08(Wastage)= 1.69 Yds X12 Pcs = 20.28 Yds /Doz.

Back Pocket Consumption = (7”X 6.5 )=44.5 X 2 pc / 57 X 36 =91 /2052 =.044 +.0022=.047 X12 Pcs 
= 0.56 Yds / Dz
Belt loop Consumption = (1.5”X .5 ) = .75 X 6 pc / 57 X 36 =4.5 /2052 =.0022 +.0001=.0023 X12 Pcs 
= 0.028 Yds / Dz

Total Fabric =20.28 yds +0.56 Yds+0..28 Yds = 20.84 Yds / Dz
For Pocketing Fabric :- Length =7 .5 inch X 2 Ply +1 inch (SA )=( 15+1) inch = 16 inch 

Width = 6.5 inch X 2 Ply + 1 inch (SA )= 14 inch 
= ( 16 inch X 14 inch )2 pcs /(43 inch X 36 inch)
= 448/1548
=.29+5% wastage=.28+.0145=0.30X 12 Pcs =3.65 Yds Per


So we can say, based on above measurement we need 20.84 Yds main fabric & 3.65 Yds pocketing fabric to make 12 Pcs Basic long pant. this way we can calculate fabric consumption for any quantity