What does this assembly actually cost to build? Itemize parts, sub-assemblies, and outside processing, and roll the cost up through levels — with the subcontract share made visible. Free, no signup — your BOM stays in your browser.
Build your bill of materials and see the true rolled-up cost — parts, sub-assemblies, and outside processing included.
You're rolling up this routing by hand — setup, labor, nested operations, and materials. Fabbric keeps your live BOM & routing linked to quotes, jobs, and POs automatically.
See how Fabbric works →A bill of materials is rarely flat. The harness has leads, the leads have wire and terminals, and somewhere in the middle a vendor crimps or plates or pots something for you. Costing it means rolling up through the levels: each sub-assembly's cost is the sum of its components, multiplied by how many of it the parent uses — and so on up to the top. Do that in a spreadsheet and the errors hide in the multiplication: a quantity fixed at one level but not re-rolled above it, a sub-assembly costed once at last year's wire price and never touched again.
The piece most BOM calculators skip entirely is outside processing. If a subcontractor performs a step — crimp-and-test, anodize, heat treat — that cost belongs in the roll-up exactly like a purchased part, because you can't ship the assembly without it. It also behaves differently: subcontract prices move independently of your material, and their share of the assembly is what quietly erodes margin between quotes. That's why this tool breaks the rolled-up cost out by supply type — Buy, Make, Subcontract — so you can see at a glance how much of the assembly's cost you control and how much rides on vendors.
Once you trust the rolled-up number, it becomes the material cost of the next quote — which is why this tool hands its result straight to the Quote Estimator. Cost the assembly, then price the project.