How to Calculate Fabric Consumption and Costing for 1 Dozen Trousers

Introduction:
Fabric consumption for making a trouser is an important task for garments merchandiser. When a buying house get an order for trouser then merchandising manager distribute order among other merchandisers. Then fabric consumption is the first and basic work for responsible merchandiser.
Fabric Consumption and Costing for 1 Dozen Trousers
Fig: Trouser sketch
Consumption Calculation for 1 Dozen Trousers:
 

Equation for consumption of 1 piece trouser:

Fabric Consumption for trouser = (L + Allowance) x (W+ Allowance) x 4

Here,
L= Length of the out seam measurement including waist band = 45”,
Bottom hem seam allowance = 2”
Waist band seam allowance = 1”
Sewing allowance = 1”

W = Thigh width = 15”
Inseam allowance =1”
Out seam allowance = 1”

Now,

Fabric Consumption for trouser = (45+4) x (15+2) x 4
= 49 x 17 x 4 sq. inch
= 3332 sq. inch

Fabric consumption for pocketing:

It is also required to calculate pocketing and lining fabric requirement. As per design, two front pockets are considered. Calculation is as follows:


Fabric consumption for pocketing:
(L+ 1) X (W+1) X Number of pockets

Here,

L = length of the pocket = 10”
W= Width of the pocket = 6”
Number of pockets = 2

Now,
Fabric consumption for pocketing = (10+ 1) X (6+1) X 2
= 11 x 7 x 2 sq. inch
= 154 sq. inch

Total fabric consumption for 1 piece trouser = 3332 + 154 sq. inch
= 3486 sq. inch

If we consider the width of fabric = 60 inch
Then marker width = 58, therefore

Fabric required for 1 piece trouser = 3486/58 inch
= 60.1 inch
= 60.1/36 yds
= 1.67 yds

If the wastage 9%,
Total fabric consumption with waste percentage
= 1.67 + 9% yds
= 1.76 yds

1.76 yds fabric need for 1 piece trouser.

So, 1 Dozen trousers need = 12 x 1.76 = 21.12 yds fabric

Costing Calculation of 1 Dozen Trouser:

If,
Cost of main fabric = (21.12 x 2)$ [$2/yd] = 42.24$
Cost of accessories/doz ……… = $7.00
Washing cost/doz ……………. = $4.50
C. M. …………………………… = $18.00
…………………………………………………………………
Total cost                                    = 71.74$

1 Dozen trouser cost is 71.74$.

Actual costing depends on accessories, washing and cost of making. And its depend on buyer requirements.