Construction Products, Windows, Doors & Fenestration worked example

Window Unit Cost at 72% window cost scope included: a worked example

Suppose window cost scope included falls to 72%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate finished window unit cost from opening count, full unit cost, included scope, and project adders.

The inputs for this scenario

  • window units in the order: 120 windows (held at the documented default)
  • fully burdened cost per window: 385 $ / window (held at the documented default)
  • window cost scope included: 72 % (the input this scenario stresses; the baseline uses 100)
  • fixed project, engineering, and freight adder: 4,200 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable window unit cost = window units in the order × fully burdened cost per window × window cost scope included.
  • total window order cost works out to 37,464 $ at these inputs, and this is the headline figure for the scenario.
  • cost per window works out to 312 $ / piece at these inputs.
  • variable window unit cost works out to 33,264 $ at these inputs.
  • fixed project, engineering, and freight adder works out to 4,200 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where window cost scope included sits at 100% and the headline result is 50,400 $, this scenario comes in 25.67% below the baseline at 37,464 $.
  • It computes the total cost of a window order and the cost per window from a burdened per-window cost, a cost-scope percent, and fixed project, engineering, and freight adders. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • total window order cost: 37,464 $ (headline result)
  • cost per window: 312 $ / piece
  • variable window unit cost: 33,264 $
  • fixed project, engineering, and freight adder: 4,200 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Window Unit Cost calculator, set window cost scope included to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.