% scrap / cost
Scrap Rate Calculator
Estimate scrap rate from rejected units and total units produced.
Manufacturing engineering planning note
Manufacturing engineering calculators on ToolsBing are preliminary planning and education tools only. Production environments require verified process data, quality standards, machine capability review, safety controls, supplier constraints, maintenance conditions, and qualified operational review before implementation.
Enter manufacturing inputs
Estimated result
Use for early production planning, education, and comparison only.
Compare against real run data, quality targets, maintenance conditions, staffing, and process constraints.
Formula and assumptions
Scrap rate = scrap units ÷ total units; scrap cost = scrap units × material cost
This calculator uses simplified manufacturing assumptions. Actual production performance can be affected by downtime, changeovers, quality losses, machine condition, operator availability, material variability, bottlenecks, and scheduling constraints.