Film GSM Calculator
Convert film thickness and density to grams per square metre and coverage per kilogram.
Inputs
µm
g/cm³
Results
- Grammage
- 27.6 g/m²
- Coverage (yield)
- 36.23 m²/kg
Formula
GSM (g/m²) = Thickness (µm) × Density (g/cm³)
Coverage (m²/kg) = 1000 ÷ GSM
Assumptions & limits
- Uniform single-layer film at nominal thickness.
- Coatings, print and lamination adhesives are not included.
Worked example
30 × 0.92 = 27.6 g/m², so 1 kg covers 1000 ÷ 27.6 ≈ 36.23 m².