| Material | — |
| Machine time | — |
| Labor | — |
| Tooling | — |
| Setup (amortized) | — |
| Overhead | — |
| Cost per part | — |
Building a Part Cost from the Ground Up
A defensible per-part cost adds up every input that actually consumes money: raw material, machine time at your shop's hourly rate, operator labor, tooling wear, and a fair share of the setup cost for the batch. This calculator keeps each of those visible separately so you can see where the cost is really coming from before you quote a job.
Why Batch Size Changes the Number
Setup cost doesn't scale with part count, it's a fixed cost for the run, so spreading it across more parts lowers the per-part burden. A 50-piece batch absorbs setup very differently than a 5-piece batch, even when every other input stays the same. Re-run the quantity field to see how a quote should shift as a customer's order size changes.
Where Overhead Fits
The overhead percentage here is meant to recover indirect costs that don't attach to any one part directly, like supervision, utilities, and facility costs. Shops vary widely in what they fold into this number, so treat the default as a starting point and replace it with your own shop's actual overhead rate.