Machining & expected-yield budgets
Machining Batch Cost Calculator
Spread setup and whole expected-start costs over a required good-part batch.
168 / MACHINING BATCH COST
Inputs stay in this browser.
Your numbers.
A clearer decision.
Inputs stay in this browser.
INPUT GROUP 01
Entered assumptions and matching units
Check the assumptions before acting on a result.
Read the method and exampleYOUR CALCULATION
Spread setup and expected scrap allowance over required good parts.
Setup plus started-part cycle minutes
Modeled batch cost
Cost per required good part
Illustrative inputs loaded. Replace them with your own assumptions.
How the machining batch cost calculator works
Whole starts equal required good parts divided by one minus scrap fraction, rounded upward. Batch time is one setup plus all started-part cycles. Price that time at the machine rate and add tool/material allowance per start.
Expected scrap is a planning allowance, not a probability guarantee of enough accepted parts. Total rounds once to cents; cost per required good part is separately rounded. A supported yield greater than zero is required.
Zero demand suppresses the batch. Labor belongs in the entered machine rate if desired. No tooling, speed/feed setting, tolerance, material suitability or machine capability is inferred.
Worked example
One hundred good parts with 10% scrap allowance require 112 starts. Sixty setup minutes plus 112 three-minute cycles is 396 minutes. At $60/h plus $6/start, cost is $1,068. Requiring 101 good parts gives 113 starts and $1,077.
Sources and assumptions
The source material explains the underlying calculation or pricing structure. Entered prices, costs, schedules and scenario choices are your assumptions; this tool does not obtain supplier quotes or predict actual results.
Related calculators
Calculation methods, testing and sources · Practical calculation guides