Contract Manufacturing, Job Shop Quoting & Make-to-Order calculator
Custom Part Cost Calculator
Use this calculator to combine order quantity, variable cost per part, costed scope, and fixed setup/tooling/engineering adders for a custom part quote.
What this calculator does
- Estimate total cost for a customer-specific part or assembly.
- building a quote from material, routing, setup, tooling, inspection, and outside service assumptions
- The result estimates total cost for the custom part quote and the variable cost basis per part.
Formula used
- Variable custom part cost = quoted part order quantity × variable cost per custom part × costed quote scope included
- Total custom part cost = variable custom part cost + fixed setup, tooling, and engineering cost
Inputs explained
- quoted part order quantity: Use the RFQ quantity, release quantity, or customer lot size for the same drawing revision and material specification.
- variable cost per custom part: Include material, direct labor, machine time, outside services, packaging, scrap allowance, and variable overhead per part.
- costed quote scope included: Use 100% for the full part cost or less for one operation, option, revision, or customer-requested scope.
- fixed setup, tooling, and engineering cost: Include programming, fixtures, gauges, tooling, first article, drawing review, and quote-specific engineering that should be recovered.
How to use the result
- Use it to build price per part, compare lot sizes, review make-versus-buy, and protect margin on custom work.
- Treat the result as an estimate until the RFQ package, customer drawing revision, material quote, routing, setup standard, shop rate, outside service quote, scrap history, open capacity, due date, and quoted commercial terms are confirmed for the same job, lot size, and customer order.
Common questions
- What is the custom part cost calculator for? Use this calculator to combine order quantity, variable cost per part, costed scope, and fixed setup/tooling/engineering adders for a custom part quote.
- What information should I enter? Enter quoted part order quantity, variable cost per custom part, costed quote scope included, and fixed setup, tooling, and engineering cost using the same quote revision, customer order, lot size, routing, and cost basis.
- What does the result tell me? The result estimates total cost for the custom part quote and the variable cost basis per part.
- When is the result only an estimate? Treat the result as an estimate until the RFQ package, customer drawing revision, material quote, routing, setup standard, shop rate, outside service quote, scrap history, open capacity, due date, and quoted commercial terms are confirmed for the same job, lot size, and customer order.
Last reviewed 2026-05-12.