Construction Products, Windows, Doors & Fenestration worked example

Insulated Glass Unit Cost at 72% igu cost scope included: a worked example

Suppose igu 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 IGU cost from unit count, build cost per IGU, scope, and fixed glass-room adders.

The inputs for this scenario

  • insulated glass units in the order: 160 IGUs (held at the documented default)
  • fully burdened cost per IGU: 148 $ / IGU (held at the documented default)
  • IGU cost scope included: 72 % (the input this scenario stresses; the baseline uses 100)
  • fixed IGU setup, testing, and freight adder: 1,900 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable IGU cost = insulated glass units in the order × fully burdened cost per IGU × IGU cost scope included.
  • total insulated glass unit cost works out to 18,950 $ at these inputs, and this is the headline figure for the scenario.
  • cost per IGU works out to 118 $ / piece at these inputs.
  • variable IGU cost works out to 17,050 $ at these inputs.
  • fixed IGU setup, testing, and freight adder works out to 1,900 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where igu cost scope included sits at 100% and the headline result is 25,580 $, this scenario comes in 25.92% below the baseline at 18,950 $.
  • It computes total IGU cost by multiplying order quantity by burdened cost per IGU at your included scope, then adding a fixed setup, testing, and freight adder. 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 insulated glass unit cost: 18,950 $ (headline result)
  • cost per IGU: 118 $ / piece
  • variable IGU cost: 17,050 $
  • fixed IGU setup, testing, and freight adder: 1,900 $

Run it with your numbers

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

Last reviewed 2026-05-12.