Foam, Insulation & Cushioning Products worked example

Density Variation with highest measured foam density of 5.7 pcf: a worked example in foam, insulation & cushioning products

What does the result look like when highest measured foam density reaches 5.7 pcf? The full calculation is worked below with real intermediate numbers. Use it when density variation affects firmness, R-value, compression force deflection, weight, cost, or customer specification compliance.

The inputs for this scenario

  • Highest measured foam density: 5.7 pcf (raised for this scenario; the documented default is 2.28)
  • Lowest measured foam density: 2.05 pcf (unchanged)
  • Nominal foam density target: 2.15 pcf (unchanged)

Working through the calculation

  • Applying the documented formula (Density Variation range = highest measured foam density - lowest measured foam density) to the inputs above produces each figure below.
  • At this operating point the engine returns 0 units for density variation spread, the number this scenario is built around.
  • At this operating point the engine returns 0 value for spread.
  • At this operating point the engine returns 5.7 value for minimum.
  • At this operating point the engine returns 2.05 value for maximum.

How this compares with the baseline

  • Against the tool's baseline example, where highest measured foam density sits at 2.28 pcf and the headline result is 0 units, this scenario lands almost exactly on the baseline at 0 units.
  • A figure at this level is achievable when highest measured foam density is genuinely sustained, not just peaked for a shift. Range only captures the two extremes — two outlier readings can flag a problem that does not represent the whole bun, so pair it with the full sample set and a standard deviation for true process capability.

Results at a glance

  • Density Variation spread: 0 units (headline result)
  • Spread: 0 value
  • Minimum: 5.7 value
  • Maximum: 2.05 value

Run it with your numbers

  • Every input above is editable in the live Density Variation calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.