Scrap Rate Calculator — Manufacturing Scrap & Yield
Calculate scrap rate, yield percentage, and cost of poor quality from production data.
Scrap Rate
3.50%
Good Units
965
Yield Rate
96.50%
Formula
**Scrap Rate Formula**
Scrap Rate (%) = (Defective Units ÷ Total Units) × 100
Yield Rate (%) = 100 − Scrap Rate
Good Units = Total Units − Defective Units
Worked Example
**Example:** 1,000 units, 35 defective
Scrap Rate = (35 ÷ 1,000) × 100 = **3.5%**
Yield = 100 − 3.5 = **96.5%** | Good Units = **965**
Frequently Asked Questions
What is a good scrap rate?
Best-in-class targets below 1%. Typical rates are 2-5%. Above 5-10% indicates process control or material problems.
Is scrap rate the same as defect rate?
Scrap rate counts units thrown away. Defect rate counts all nonconforming units including those reworked. Scrap rate is always less than or equal to defect rate.
How does scrap rate affect OEE quality?
OEE quality = (Good Units ÷ Total Units) = (100 − Scrap Rate) / 100. A 3.5% scrap rate means 96.5% OEE quality.