Calculators
Scrap Rate Calculator
Calculate scrap rate, first-pass yield and the material and labour cost of scrapped units.
- Runs in your browser
- Nothing uploaded
The tool
Enter your numbers below. Results update as you type, and nothing leaves your browser.
Everything you enter stays on your own machine. Nothing is sent to us or to anyone else, which you can confirm in your browser network tab.
What people use it for
- Quality reporting
- Cost of quality analysis
- Supplier quality reviews
- Continuous improvement
About this tool
What the Scrap Rate Calculator does
Scrap rate is the share of production that cannot be used or sold. First-pass yield is the share made right first time without rework. Multiplying scrapped units by their material and labour cost shows what quality problems cost.
Formula
- Scrap rate = scrapped ÷ produced
- First-pass yield = (produced − scrapped − reworked) ÷ produced
- Scrap cost = scrapped × (material + labour)
Worked example
Using the starting values in the calculator above:
| Input | Value |
|---|---|
| Units produced | 25,000 |
| Units scrapped | 600 |
| Units reworked | 900 |
| Material cost per unit | $6.50 |
| Labour and overhead per unit | $3.20 |
| Rework cost per unit | $2.10 |
| Result | Value |
|---|---|
| Scrap rate | 2.40% |
| First-pass yield | 94.0% |
| Cost of scrap and rework | $7,710 |
| Scrap cost | $5,820 |
| Rework cost | $1,890 |
How to read the result
Track scrap by cause and machine, then attack the biggest causes first; Pareto charts make this quick.
Scrap found late in the process costs more because more labour has been added.
Related calculators
- Economic Order Quantity Calculator: Calculate the economic order quantity that minimises ordering and holding costs, with orders per year and total annual cost.
- WIP Inventory Calculator: Calculate ending work-in-process inventory value, WIP turnover and average flow time using Little’s Law.
- SMED Changeover Calculator: Calculate production time and value recovered by reducing changeover time with SMED, and the smaller batches it makes possible.
- OEE and TPM Loss Calculator: Calculate overall equipment effectiveness from availability, performance and quality losses, and the largest loss to target.
Browse every calculator in Manufacturing and Operations Calculators, or talk to us about websites and digital tools for manufacturers.
More tools and services
- 1031 Exchange Calculator
- 401(k) Contribution Optimizer
- 529 College Savings Calculator
- A/B Test Significance Calculator
- Accessible Ramp Calculator
- Accounts Payable Aging Calculator
If you would rather someone did this properly for you, we offer Web Design Services and Website Development, SEO Services: Search Engine Optimization, AI Automation Agency.
Questions
Questions about this tool
The things clients actually want to know — costs, timelines, ownership and what happens after launch.
Scrapped units divided by total units produced.
The share of units made correctly the first time without rework or scrap.
It depends on the process; world-class operations often aim for well under 1%.
Free strategy session
Let’s build something worth finding.
Tell us where you want the business to be in twelve months. We will come back with a costed plan, a realistic timeline, and the numbers we expect to move — no obligation, no jargon.
- 30-minute call, no pitch deck
- Fixed-price proposal in 48 hours
- You own everything we build
Talk to a developer
Not a sales team
- Response time
- Within 1 business hour
- Where we work
- UK, USA & the Gulf
- Contracts
- No lock-in, monthly rolling
- Working since
- 2023