Composites, Fiberglass & Advanced Materials worked example

Lightweighting Payback with lightweighting investment of 92,500 $: a worked example

This worked example runs the lightweighting payback numbers for a tougher week than the baseline: lightweighting investment of 92,500 $ instead of the typical 185,000 $. Estimate payback for switching to a lighter composite or advanced material solution.

The inputs for this scenario

  • lightweighting investment: 92,500 $ (the input this scenario stresses; the baseline uses 185,000)
  • annual lightweighting savings: 62,000 $ / yr (held at the documented default)
  • annual support and program cost: 8,500 $ / yr (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Net annual benefit = annual lightweighting savings - annual support and program cost.
  • lightweighting payback works out to 1.73 yr at these inputs, and this is the headline figure for the scenario.
  • Net annual lightweighting payback savings works out to 53,500 $ / yr at these inputs.
  • lightweighting investment works out to 92,500 $ at these inputs.
  • Five-year net lightweighting payback value works out to 175,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where lightweighting investment sits at 185,000 $ and the headline result is 3.46 yr, this scenario comes in 50% below the baseline at 1.73 yr.
  • Use it when evaluating a metal-to-composite conversion, a lighter-alloy substitution, or a structural redesign where weight reduction drives fuel, freight, payload, or material savings. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • lightweighting payback: 1.73 yr (headline result)
  • Net annual lightweighting payback savings: 53,500 $ / yr
  • lightweighting investment: 92,500 $
  • Five-year net lightweighting payback value: 175,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Lightweighting Payback calculator, set lightweighting investment to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.