Costing procedure of calculating per piece knitwear garment

Understanding the costing procedure of calculating per piece knitwear garment is essential for garment manufacturers, merchandisers, and beginners entering the textile industry. This guide explains each step in detail, from yarn calculation to final garment costing, ensuring accuracy and profitability. Whether you run a factory or want to learn garment costing professionally, mastering these formulas and techniques will help you control production costs, reduce waste, and maximize earnings in competitive markets.

Introduction to Knitwear Garment Costing

Knitwear garment costing is the backbone of the apparel industry. It determines how much a garment costs to produce and how much profit a manufacturer can earn. Costing includes yarn consumption, knitting, dyeing, stitching, finishing, packing, and overhead expenses. Accurate costing ensures business sustainability, especially in export-oriented industries where price competition is high.

Why Costing is Important in Knitwear Industry

Costing helps manufacturers calculate exact expenses and set competitive prices. Without proper costing, businesses may face losses or reduced profits. It also helps in budgeting, forecasting, and improving operational efficiency.

Ensures profit margin
Helps in pricing strategy
Controls wastage
Improves production planning
Supports export competitiveness

Basic Components of Knitwear Garment Costing

1. Yarn Cost

Yarn is the primary raw material in knitwear garments. Its cost depends on quality, count, fiber type, and market price fluctuations.

2. Knitting Cost

This includes machine cost, labor cost, and electricity used during knitting.

3. Dyeing and Finishing Cost

Fabric dyeing, washing, and finishing treatments add value and affect final cost.

4. Cutting and Stitching Cost

Garment construction cost includes labor, machine usage, and thread consumption.

5. Packing Cost

Includes poly bags, cartons, labeling, and packaging materials.

6. Overhead Cost

Administrative, factory rent, utilities, and miscellaneous expenses.

Understanding Fabric Weight in Knitwear Garments

Fabric weight plays a crucial role in garment costing. It determines yarn consumption and overall cost per piece. There are three major types of weights used in knitwear:

Actual Weight
Gross Weight
Net Weight

Actual Weight Calculation

Actual weight refers to the total yarn used for a job order. It is calculated using the following formula:

Formula:

Actual Weight = Number of Bags of Yarn × 45.36 × 12 ÷ Total Pieces

Explanation:

1 bag of yarn = 45.36 kg
Multiply by 12 for dozen conversion
Divide by total garment pieces

Example:

If a factory uses 10 bags of yarn to produce 5000 pieces:

Actual Weight = 10 × 45.36 × 12 ÷ 5000
= 5443.2 ÷ 5000
= 1.088 kg per dozen

This means each dozen garments weighs approximately 1.088 kg.

Gross Weight (Grass Weight) Calculation

Gross weight refers to the weight of the fabric before finishing and wastage deduction. It includes moisture content and processing variations.

Formula:

Gross Weight = Net Weight + Wastage % + Moisture %

Example:

Net Weight = 150 grams
Wastage = 10%
Moisture = 5%

Gross Weight = 150 + (150 × 10%) + (150 × 5%) = 172.5 grams

Net Weight of Knitwear Garment

Net weight is the final weight of a finished garment after all processes such as washing, trimming, and finishing.

Definition:

Net Weight = Final ready garment weight per piece

Importance:

Used for costing accuracy
Determines fabric consumption
Helps in export documentation

Step-by-Step Knitwear Garment Costing Procedure

Step 1: Calculate Yarn Consumption

Yarn consumption depends on GSM (grams per square meter), garment size, and style. Accurate calculation helps avoid material shortages or excess.

Formula:

Yarn Consumption = Fabric Weight × Total Pieces

Step 2: Convert Fabric into Garment Units

Fabric is converted into garment pieces considering cutting efficiency and wastage.

Example:

Total Fabric = 1000 kg
Wastage = 8%
Effective Fabric = 920 kg

Step 3: Add Process Costs

Knitting Cost
Dyeing Cost
Cutting Cost
Stitching Cost
Finishing Cost

Step 4: Calculate Cost Per Piece

Total Cost ÷ Total Pieces = Cost Per Piece

Example of Complete Knitwear Costing

Case Study

Yarn Cost = $5/kg
Fabric Consumption per piece = 0.2 kg
Processing Cost = $1
Overhead Cost = $0.5

Calculation:

Yarn Cost per piece = 0.2 × 5 = $1
Total Cost = 1 + 1 + 0.5 = $2.5

Final garment cost per piece = $2.5

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AI Enhancement in Garment Costing

Artificial Intelligence is transforming garment costing by automating calculations, predicting material usage, and reducing errors. AI tools can analyze past production data to improve costing accuracy and suggest cost-saving strategies.

Automated cost prediction
Real-time material tracking
Waste reduction analysis
Profit optimization

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Advanced Knitwear Garment Costing Techniques

Advanced costing techniques help manufacturers improve accuracy, reduce wastage, and increase profitability. These techniques involve detailed analysis of fabric consumption, efficiency ratios, and machine productivity. By applying advanced costing methods, factories can compete in international markets and secure long-term buyers.

1. Costing Based on SMV (Standard Minute Value)

SMV is used to calculate labor cost per garment based on time required to produce one piece. It is a critical factor in stitching cost calculation.

Formula:

Labor Cost per Piece = SMV × Cost per Minute

Example:

SMV = 12 minutes
Cost per minute = $0.05
Labor Cost = 12 × 0.05 = $0.60

2. Efficiency-Based Costing

Factory efficiency affects production cost. Higher efficiency reduces cost per piece.

100% efficiency = ideal production
80% efficiency = higher cost per piece

3. Wastage Control in Knitwear

Wastage directly increases production cost. Controlling fabric and yarn wastage improves profitability.

Types of Wastage:

Knitting wastage
Cutting wastage
Dyeing loss
Finishing loss

Example:

If total wastage is reduced from 10% to 7%, the cost per piece decreases significantly, increasing profit margins.

Detailed Breakdown of Cost Elements

1. Yarn Cost Calculation in Detail

Yarn cost fluctuates based on cotton rates, fiber quality, and international market demand. Accurate yarn costing ensures stable pricing.

Example:

Yarn price = $6/kg
Consumption per piece = 0.18 kg
Total yarn cost per piece = $1.08

2. Dyeing and Processing Cost

Dyeing cost depends on fabric type, color, and finishing processes such as enzyme wash or silicon wash.

Basic dyeing = low cost
Reactive dyeing = higher cost
Special finishes = premium cost

3. Accessories Cost

Accessories include labels, tags, buttons, zippers, and threads. Though small, they impact total cost.

Example:

Main label = $0.05
Hang tag = $0.03
Thread = $0.02
Total accessories cost = $0.10

4. Packing Cost

Poly bag
Carton
Sticker
Barcode

Packing cost per piece may range between $0.15 to $0.50 depending on export requirements.

Final Costing Sheet Format (Professional Method)

Example Cost Sheet

Yarn Cost = $1.08
Knitting Cost = $0.30
Dyeing Cost = $0.50
Stitching Cost = $0.60
Accessories = $0.10
Packing = $0.20
Overhead = $0.40

Total Cost:

Total = $3.18 per piece

Profit Calculation

Profit margin is added after total cost calculation.

Example:

Total Cost = $3.18
Profit Margin = 20%
Selling Price = $3.81

Industrial Tips for Accurate Costing

Always use updated yarn rates
Monitor wastage daily
Use software for costing automation
Maintain production records
Train staff for efficiency

Common Mistakes in Garment Costing

Ignoring wastage percentage
Incorrect SMV calculation
Not updating raw material prices
Underestimating overhead costs
Skipping quality control expenses

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Conclusion

The costing procedure of calculating per piece knitwear garment is a complete system that requires accuracy, experience, and proper data analysis. From yarn calculation to final pricing, every step plays a vital role in determining profit margins. By understanding actual weight, gross weight, and net weight formulas, manufacturers can control costs effectively. Advanced techniques like SMV and efficiency-based costing further enhance productivity. With proper SEO and monetization strategies, this knowledge can also become a powerful online earning source.

Frequently Asked Questions (FAQ)

1. What is the most important factor in garment costing?

Yarn consumption is the most important factor because it contributes the highest percentage of total cost.

2. How is cost per piece calculated?

Total production cost divided by total number of garments gives cost per piece.

3. What is SMV in garment industry?

SMV (Standard Minute Value) is the time required to produce one garment piece.

4. Why is wastage important in costing?

Wastage increases cost, so reducing it improves profitability.

5. What is net weight in knitwear?

Net weight is the final weight of a finished garment ready for sale.

Key Points for New Learners

Start with basic costing formulas
Understand fabric weight concepts
Practice real-life examples
Learn Excel or costing software
Stay updated with market prices

Bonus: Turning This Knowledge into an Earning Machine

You can convert this knowledge into income by starting a blog, YouTube channel, or freelance service. Many textile students and professionals search for costing guides online.

Create SEO articles on textile topics
Monetize with Google AdSense
Offer freelance costing services
Sell digital courses
Start a textile consultancy

By combining textile expertise with digital marketing, you can build a powerful passive income system and grow your online presence in the textile niche.

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