Textile Floor │Fabric Consumption formula for Pant

We all know that every part of garments have its LENGTH & WIDTH measurement. Basically on woven garments, we need to calculate the consumption in Yard/ Doz (2.54 Cm= 1 inch & 36 inch = 1 Yds,). Thats why we also need to know the Width of that particular fabric which we are going to use. Now we will calculate each of the separate part based on this Length & Width. to have the total consumption, for this we can use Separate part formula as below:-

(LENGTH X WIDTH) X Number of Parts pcs or Panels / Fabric Width
(we should consider suitable sewing allowance with each length & width for each application.)

After calculate the consumption of all part this way, now we will add all that separate parts consumption together, than we will take wastage percentage based on the fabric nature which we use for that particular garments.

We can also workout the consumption of a bottom item by using the below “Solid formula for calculate consumption"

Formula for calculate required Fabric consumption / Doz :-

(Total LENGTH X Total WIDTH ) X Number of Parts pcs or Panels / Fabric Width X36"
= (Total + 5 % Wastage) X 12 Pcs= Result in ..Yds / Doz .

here,
Total Length = Inseam (Length) + Back rise (Including West band ) + Sewing Allowance (S.A )
Total Width = ½ Thai + Sewing Allowance

** we can also calculate
( A) Back rise without West band
( B) Parts pcs = there is 4 pcs of 1/2 Thigh as a bottom item has 2 Leg
(C) We multiply the total measurement with 36 inch to make the result in yds which was in inch before
( D) For wastage percentage the calculation depends on the nature of fabric shrinkage or elongation on wash & others effect
**{We calculate this wastage percentage lowest ( 5 % ) on Regular fabric but for Stretch fabric it may stand up to 25 % based on the nature of the Fabric}


For Example:
Say we have the bellow measurement of a "Basic Denim long pant" :-
Inseam = 34 inch,
½ Thigh = 13 inch,
Back rise (Under West Band) = 15 Inch
Waist band width (Wbw) = 1.5 in ch,
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: Here,
Total Bottom Length = Inseam + Back rise + Wbw + Sewing allowance.
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 X 12 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 / 2052 square inch )+ 5% Wastage X 12 Pcs
= {1.61 Yds +0.08(Wastage)} X 12 Pcs
= 1.69 Yds X 12 Pcs
= 20.28 Yds /Doz.

Back Pocket Consumption:
= (7”X 6.5 ) = 44.5 X 2 pc / 57 X 36 = 91 /2052
= 0.044 + 0.0022 = 0.047 X 12 Pcs
= 0.56 Yds / Dz

Belt loop Consumption:
= (1.5” X 0.5 ) = 0.75 X 6 pc / 57 X 36 = 4.5 /2052
= 0.0022 + 0.0001 = 0.0023 X 12 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
so, ( 16 inch X 14 inch ) 2 pcs / (43 inch X 36 inch)
= 448 / 1548
= 0.29 + 5% wastage = 0.28 + 0.0145 = 0.30 X 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. By following this we can calculate fabric consumption for any quantity.

Thanks to all...