For clothing processing factories, when customers send inquiries, they often need to give the corresponding quotation at the first time, so if there is a set of methods, it is undoubtedly very convenient to quickly judge the fabric consumption and wear and tear of clothing. 
So what is the calculation method of fabric loss in clothing processing? In the actual production, how can we reduce the fabric loss in clothing processing? 
In fact, there are many methods to calculate the unit consumption of clothing fabrics, and the usual methods are sample layout method, analogy method and area calculation method. 
Generally speaking, in the actual production of large goods, we use the model layout method to determine the unit consumption. 
However, when there is no sample or does not start proofing, the initial quotation is that Ruikang clothing industry generally uses analogy or area calculation method to initially estimate unit consumption and quote. In these two methods, the area calculation method will be relatively simple and reasonable, so it is used more widely. 
The principle of area calculation: 
The basic principle of clothing fabric area calculation is a process of "turning parts into whole and irregularities into rules". 
We know that a piece of clothing usually has many trivial pieces, such as front skirt, back skirt, cuffs, neckline and so on. As far as the structure and shape of a single piece of clothing is concerned, many parts have no rules to speak of. But if we put the same piece of clothing without rules, through reverse combination or merger, we can find rectangles, parallelograms and other regular shapes that facilitate the calculation of area. 
So how to combine the trivial pieces of clothing together for calculation, and how to combine the irregular pieces of clothing into a shape that is relatively easy to calculate the area to calculate the area of materials? in fact, it is the principle that we use the area calculation method to calculate the unit consumption of clothing fabric. 
Formula for calculating the amount of clothing fabric: 
1. Basic formula: 
Amount (code) = total area (M2) × (1 + loss) / effective width (M) / 0.9144M/ code. 
Wear and tear: 6% for woven fabric and 8% for knitted fabric. 
Effective width: total width-3cm (pinhole). 
Price (yuan / yard) = price (yuan / kg) × gram weight (kg / m 2) x width (m) x 0.9144 (yard / m). 
When adding cotton, the amount of loosening is 4cm. 

2. Calculation of the amount of coat: 
Length = length + hem and seam position (2.5cm+1.5cm) + shoulder and neck seam position (1.5cm) + looseness (1cm). 
Width = chest circumference + side seam position (1.5cm × 4) + placket seam position (1cm × 2)-zipper width (1cm) + loosening (2cm). 

3. Calculation of sleeve dosage. 
Length = sleeve length + cuff hem and seam position (2.5cm+1cm) + shoulder and neck seam (1cm) + loosening (1cm). 
Width = sleeve elbow width × 2 + seam position (1.5cm × 2) + loosening (1cm). 
The cuff elbow width is measured from the shoulder point to the cuff straightness, generally minus the 4~5cm by the cuff straightness. 

4. Pants area calculation: 
Length = trouser length + waist height × 2 + waist seam position (1cm × 2) + foot hem. 
Width = hip circumference × 1.24+16cm.
Empirical formula: width = hip circumference + back wave warping + seam position. 
Also: back wave warp (adult trousers press 35cm, medium trousers press 40cm, shorts press 45cm; middle children's trousers press 25cm, medium trousers press 30cm; children's trousers press 15cm, medium trousers press 20cm). 
In addition: the hip circumference is usually measured at the length of the wave before the bottom of the wave. 

5. Calculation of the amount of collar. 
Collar amount = collar length × collar height × 2. 
Generally speaking, men's wear is at least 10cm. 
Inner hanging amount: 15cm for men and 13cm for women. 
Usage of pick-and-paste: general 5cm. 

6. Calculation of other dosage. 
Hat: press 15~20cm (20cm for men, 15cm for women), press 25cm with cap, press 5cm. 
Noodles: press 10cm. 
Rolling bar: 2.2cm width-2.713 × 4% (loss) / 0.9144 (yard / m). 
The width of the cloth is 1.5m, the lower part of the sleeve is 15cm, and the lower part of the trousers is 25cm. 
Bag cloth: 2 pieces, 4 pieces, 15 cm, 10 pieces, 2 pieces, 5cm. 
The amount of mesh cloth: length × 1.5m (width) × 1.06 (loss) × g weight (net cloth loss in kilograms, more holes, large loss). 
Tips for estimating unit consumption: 
When purchasing clothing materials with a width of 2.7, the calculation methods are as follows: 
(1) the material of men's jacket is: 3 lengths of clothing, plus 0.3 feet of side material. If the length of a person's clothing is 2.3 feet, the amount of material required is 2.3 × 3 feet, 0.3 feet, 7.2 feet. 
(2) the material of blouse is: 3 length can be used. If someone's clothing length is 1.9 feet, the amount of material required is 1.9 × 3 feet 5.7 feet. 
(3) the material of men's trousers is: 2 trousers length, plus 0.3 feet of side material. If you make two pairs of trousers, the waistband can be cut within 2.3 feet, with a material of 3 trousers and 0.3 feet of side material. 
(4) Women's trousers are made of the same material as men's trousers. If you make two pairs of trousers, the waistline is less than 2.3 feet, the hip circumference is less than 3.2 feet, and the trouser leg is not more than 0.7 feet, it can also be cut with 3 trousers length and 0.6 feet of side material. 
When purchasing two pieces of clothing material (face width 4.3 feet), the calculation methods are as follows: 
(1) the material for men's casual wear is: 1 length of clothing, plus 1 sleeve length, plus 0.3 feet of side material, and then divided by 3. If someone has a clothing length of 2.2 feet and a sleeve length of 1.8 feet, the amount of material required is (2.2-1.8-0.3) / 4. 
= 1.43 (m). 
(2) to make trousers, you can learn only one trouser length. 
(3) to make an overcoat, the material is 2 length, plus 0.3 feet of side material.