COPQ Calculator Inputs
Use the responsive grid below. Large screens show three columns, smaller screens show two, and mobile shows one.
Example Data Table
These sample values match the one-click example loader and help you test the calculator immediately.
| Input | Example Value |
|---|---|
| Total Sales Revenue | $500,000.00 |
| Units Produced | 10,000 |
| Defective Units | 320 |
| Scrap Cost | $14,500.00 |
| Rework Labor Cost | $7,200.00 |
| Rework Material Cost | $4,800.00 |
| Downtime Cost | $6,300.00 |
| Inspection and Retest Cost | $2,100.00 |
| Supplier Chargebacks | $1,500.00 |
| Sorting and Containment Cost | $2,400.00 |
| Warranty Claims | $6,800.00 |
| Returns and Logistics Cost | $3,900.00 |
| Complaint Handling Cost | $1,600.00 |
| Field Service Cost | $4,500.00 |
| Recalls or Penalties | $0.00 |
| Estimated Lost Sales | $12,000.00 |
| Other Quality Losses | $1,750.00 |
Formula Used
Internal Failure Cost = Scrap Cost + Rework Labor + Rework Material + Downtime Cost
Containment and Support Cost = Inspection and Retest + Supplier Chargebacks + Sorting and Containment + Other Quality Losses
External Failure Cost = Warranty Claims + Returns and Logistics + Complaint Handling + Field Service + Recalls or Penalties + Estimated Lost Sales
Total COPQ = Internal Failure Cost + Containment and Support Cost + External Failure Cost
COPQ % of Sales = (Total COPQ ÷ Total Sales Revenue) × 100
Defect Rate = (Defective Units ÷ Units Produced) × 100
First Pass Yield = ((Units Produced − Defective Units) ÷ Units Produced) × 100
COPQ per Unit = Total COPQ ÷ Units Produced
COPQ per Defective Unit = Total COPQ ÷ Defective Units
How to Use This Calculator
- Enter the reporting period sales revenue, total production volume, and defective units.
- Fill in internal failure costs such as scrap, rework, and downtime.
- Add containment and support expenses like retesting, sorting, and chargebacks.
- Enter external failure values including warranty, returns, complaints, field service, and lost sales.
- Click Calculate COPQ to see the result above the form, review the chart, and export CSV or PDF reports.
Why This COPQ Calculator Helps Manufacturing Teams
This calculator turns scattered quality loss data into one financial view. It helps production, quality, operations, and finance teams compare hidden losses, track failure patterns, and prioritize improvement projects with clearer numbers.
Because the result separates internal, support, and external failure costs, you can identify whether your biggest loss comes from shop-floor waste, containment effort, or customer-facing fallout.
FAQs
1) What does COPQ mean in manufacturing?
COPQ means Cost of Poor Quality. It estimates money lost because products or processes fail to meet requirements, including scrap, rework, downtime, warranty, returns, and customer-related losses.
2) Is COPQ the same as all quality cost?
No. COPQ focuses on failure-related losses and related recovery effort. Total quality cost can also include prevention and planned appraisal spending, which are not always counted as poor-quality losses.
3) Why include lost sales in COPQ?
Poor quality can damage reputation, reduce repeat orders, and slow future demand. Adding estimated lost sales helps you capture the wider business impact beyond direct repair and replacement costs.
4) What is a good COPQ percentage of sales?
There is no universal target. Lower is better, but the right benchmark depends on industry, process maturity, product complexity, and customer risk. Use trend improvement and peer comparison together.
5) Should inspection cost always be included?
Only include extra inspection or retesting caused by poor quality in this model. Planned routine inspection belongs to broader quality cost analysis, not necessarily to poor-quality loss.
6) How often should COPQ be measured?
Many teams review COPQ monthly, weekly, or by production batch. Choose a period that matches your reporting cadence and gives enough data for stable decisions and trend tracking.
7) Can this calculator help continuous improvement projects?
Yes. It shows where losses are concentrated, making it easier to rank kaizen, lean, Six Sigma, maintenance, supplier, or customer service actions by expected financial impact.
8) Why calculate COPQ per defective unit?
COPQ per defective unit shows the average financial burden attached to each defect. It helps compare lines, products, plants, or periods even when production volumes differ.