๐ PE Bag 4-Parameter Calculator
Enter any 3 parameters โ length, width, weight, or thickness โ and we'll calculate the 4th. Density is fixed at 0.94 g/cmยณ (LDPE/LLDPE estimated default โ not an absolute standard).
๐ฌ Material Constant
โ๏ธ
PE Density = 0.94 g/cmยณ
โ LDPE/LLDPE estimated default (not an absolute standard). HDPE โ 0.96 g/cmยณ varies slightly, but the calculator uses 0.94 for general PE bag estimation.
๐งฎ Bag Parameter Calculator
cm โ bag flat length (open side to bottom)
cm โ bag flat width (side to side)
grams โ weight of one bag
ฮผm (microns) โ film thickness
๐ฌ Verification test: L=10 cm, W=10 cm, Weight=1.0 g โ Thickness should be โ53.2 ฮผm (with the ร2 front+back layer factor)
๐ Formula & How It Works
Core Formula:
Where:
โข Length ร Width = flat area of one side (single layer)
โข ร 2 = the bag has a front and a back film layer; the calculator applies this internally
โข Thickness = single-wall film gauge (converted from ฮผm to cm: รท10,000) โ enter it once, do not double it
โข Density = 0.94 g/cmยณ (estimated default for LDPE / LLDPE)
โข Weight = estimated mass of one finished, non-gusseted flat bag
This estimates a plain, non-gusseted flat bag with two film layers (front + back). It does not apply to gusseted, bottom-gusset, tubular, rolled film or multi-layer laminated structures. The result is an estimate for quotation discussion โ not a final quote, production guarantee or acceptance standard.
Weight (g) = Length (cm) ร Width (cm) ร 2 (front + back) ร Single-wall Thickness (cm) ร Density (g/cmยณ)Where:
โข Length ร Width = flat area of one side (single layer)
โข ร 2 = the bag has a front and a back film layer; the calculator applies this internally
โข Thickness = single-wall film gauge (converted from ฮผm to cm: รท10,000) โ enter it once, do not double it
โข Density = 0.94 g/cmยณ (estimated default for LDPE / LLDPE)
โข Weight = estimated mass of one finished, non-gusseted flat bag
This estimates a plain, non-gusseted flat bag with two film layers (front + back). It does not apply to gusseted, bottom-gusset, tubular, rolled film or multi-layer laminated structures. The result is an estimate for quotation discussion โ not a final quote, production guarantee or acceptance standard.
๐ Thickness Unit Converter ฮผm โ mm โ ไธ โ mil
Enter any thickness to see equivalents in all four units. Click a result to copy it.
50.00
ฮผm (micron)
5.00
ไธ (si) โ China
0.05
mm
1.97
mil โ US/UK
| ฮผm | mm | ไธ (si) | mil | Feel / Typical Use |
|---|---|---|---|---|
| 10 | 0.010 | 1.0 | 0.39 | Ultra-thin โ dry cleaning / produce bags |
| 20 | 0.020 | 2.0 | 0.79 | Light โ grocery / shopping bags |
| 30 | 0.030 | 3.0 | 1.18 | Standard retail / T-shirt bags |
| 50 | 0.050 | 5.0 | 1.97 | General purpose โ balance of strength & cost |
| 75 | 0.075 | 7.5 | 2.95 | Heavy โ mailing / hardware bags |
| 100 | 0.100 | 10.0 | 3.94 | Sturdy โ thick file bags / industrial parts |
| 150 | 0.150 | 15.0 | 5.91 | Extra heavy โ large parts / packaging |
| 200 | 0.200 | 20.0 | 7.87 | Very thick โ pallet covers / heavy liners |
Need help choosing the right thickness or size for your product? Talk to us โ
โ ๏ธ This calculator provides estimates based on estimated default LDPE/LLDPE density (0.94 g/cmยณ). Actual bag weight may vary depending on material formulation, printing, and manufacturing tolerances. Always request a physical sample for final specification verification.