Scrap Cost Calculator
Calculate the True Cost of Scrap
Enter your production volume, scrap rates, and costs to see the financial impact. Set a target rate to quantify the savings from quality improvements.
Production Volume
units
Scrap Rates
%
%
Cost Per Scrapped Unit
$/unit
$/unit
Total cost per scrapped unit: $20
Annual Scrap Cost
$120,000
500 units scrapped per month
Scrapped Units
500/mo
Material Loss
$4,000/mo
Labor Loss
$6,000/mo
Savings at Target Rate
Current (5%)$120,000/yr
Target (2%)$48,000/yr
Monthly Savings
$6,000
Annual Savings
$72,000
Improvement Target
Reducing scrap from 5% to 2% is a 60% reduction in defects, saving300 units per month.
Understanding Scrap Costs
Scrap costs go beyond just material waste. Every scrapped unit represents lost labor, machine time, and opportunity cost.
Direct Costs
- •Material: Raw material consumed to make the defective part
- •Labor: Operator time spent producing the scrapped unit
- •Machine time: Equipment hours wasted on defective parts
- •Consumables: Tooling, coolant, energy used
Hidden Costs
- •Inspection: Time spent identifying defects
- •Rework: Often costs more than making it right the first time
- •Expediting: Rush production to replace scrapped parts
- •Customer impact: Late deliveries, returns, lost trust
Scrap Rate Benchmarks
What's a "good" scrap rate depends on your industry and process complexity.
| Industry / Process | Typical Rate | World Class | Key Drivers |
|---|---|---|---|
| CNC Machining | 2-5% | <1% | Tool wear, setup errors, programming |
| Injection Molding | 1-3% | <0.5% | Process parameters, material quality |
| Sheet Metal | 3-8% | <2% | Nesting efficiency, forming issues |
| Electronics Assembly | 0.5-2% | <0.1% | Solder defects, component placement |
| Casting | 5-15% | <3% | Porosity, shrinkage, inclusions |
How to Reduce Scrap
Effective scrap reduction requires systematic root cause analysis, not just catching defects.
Quick Wins
- 1.Track scrap by reason code to identify top causes
- 2.Implement first-piece inspection on every job
- 3.Standardize setup procedures with checklists
- 4.Train operators on quality standards
Long-term Improvements
- 1.Implement SPC to catch process drift early
- 2.Use poka-yoke (mistake-proofing) in fixturing
- 3.Invest in in-process gauging and sensors
- 4.Apply DMAIC methodology to chronic problems