Free professional tools for thickness conversion, weight estimation, yield, cost calculation and more. Designed for packaging engineers and buyers.
Common Thickness Reference
| Micron | mm | Mil |
|---|---|---|
| 12 | 0.012 | 0.47 |
| 15 | 0.015 | 0.59 |
| 18 | 0.018 | 0.71 |
| 20 | 0.020 | 0.79 |
| 25 | 0.025 | 0.98 |
| 30 | 0.030 | 1.18 |
| 40 | 0.040 | 1.57 |
1 mil = 25.4 μm | 1 inch = 25,400 μm
GSM = Density × Thickness (μm). Answers “How many grams per m²?”
Yield = area coverage per kg. Answers “How many m² per kg?”
Optional – Cost per Package
Density
Typical BOPP density: 0.90 – 0.91 g/cm³
May vary by grade, additives, metallization or cavitation.
Thickness → Approx. GSM (at 0.91 g/cm³)
| Thickness | Approx. GSM |
|---|---|
| 12 μm | ~10.9 |
| 15 μm | ~13.6 |
| 18 μm | ~16.4 |
| 20 μm | ~18.2 |
| 25 μm | ~22.8 |
| 30 μm | ~27.3 |
| 40 μm | ~36.4 |
Key Formulas
GSM = Density × Thickness (μm)
Yield (m²/kg) = 1000 / GSM
Weight (kg) = Area (m²) × GSM / 1000
or
Weight = Width(m) × Length(m) × t(μm) × ρ × 0.001
These free BOPP film calculators are designed for packaging engineers, converters, and film buyers who need quick, reliable estimates during the specification and quoting stage. All calculations use a default density of 0.91 g/cm³. You can adjust the density value in most tools if your film grade differs.
1. Thickness Converter
Convert between micron (μm), mm, mil, and inch. Useful when drawings or supplier quotes use different measurement systems. A quick reference table of common thicknesses is included below the converter.
2. GSM Calculator
Calculate the unit weight (grams per square meter) of your BOPP film. Simply enter thickness and density. Essential for material comparison and cost estimation.
3. Yield Calculator
Find out how many square meters one kilogram of film can cover. Higher yield means better material efficiency. Results are also shown in in²/lb for international reference.
4. Film Weight Calculator
Estimate the theoretical weight of a film roll by entering thickness, width, length, and density. Supports multiple units. Ideal for logistics and shipping cost planning.
5. Roll Length Calculator
Reverse-calculate the approximate length of a roll when you know the weight, thickness, and width. Helpful for inventory checks and machine setup.
6. BOPP Film Consumption Calculator
Estimate how many packages can be produced from 1 kg of film based on package dimensions and film thickness. Useful for production planning and material requirement forecasting.
7. Cost Calculator
Calculate total material cost, cost per m², cost per roll, and optionally cost per package. Enter film price, dimensions, and number of rolls. Supports multi-layer packaging estimates.
8. Reference Data
Quick lookup tables for common thicknesses and corresponding GSM values, plus key formulas used in the industry. Keep this section open while working with the other tools.
Important: All results are theoretical calculations based on the density you enter. Actual film properties can vary depending on grade, additives, coatings, or metallization. Always cross-check critical values with the official Technical Data Sheet (TDS) before finalizing specifications or purchase orders.