Helpful Calculations
Price/ linear ft
$/lb / yield (sq ft/lb) x width (inches) x 12 = price/linear ft.
Price/msi
$/lb / yield (sq ft/lb) x 1000 = $ per msi
Price/roll
$/lb / yield (sq ft/lb) x width (inches) x length (feet) x 12 = $/roll
Length of roll from roll weight
lbs x yield (sq ft/lb) / width (inches) / 12 = linear feet
$/lb / yield (sq ft/lb) x width (inches) x 12 = price/linear ft.
Price/msi
$/lb / yield (sq ft/lb) x 1000 = $ per msi
Price/roll
$/lb / yield (sq ft/lb) x width (inches) x length (feet) x 12 = $/roll
Length of roll from roll weight
lbs x yield (sq ft/lb) / width (inches) / 12 = linear feet
Length of roll from roll weight
lbs x yield (sq ft/lb) / width (inches) / 12 = linear feet
Square inches / roll
width (inches) x length (feet) x 12 = sq inches
MSI / roll
width (inches) x length (feet) x 12 / 1000 = MSI
Lbs / roll
width (inches) x length (feet) x 12 / yield (sq inches) = lbs/roll
lbs x yield (sq ft/lb) / width (inches) / 12 = linear feet
Square inches / roll
width (inches) x length (feet) x 12 = sq inches
MSI / roll
width (inches) x length (feet) x 12 / 1000 = MSI
Lbs / roll
width (inches) x length (feet) x 12 / yield (sq inches) = lbs/roll
| INCHES | MILLIMETERS | INCHES | MILLIMETERS | |||
| Decimal | Fraction | Decimal | Fraction | |||
| 0.03125 | 1/32″ | 0.794 | 0.53125 | 17/32″ | 13.494 | |
| 0.0625 | 1/16″ | 1.588 | 0.5625 | 9/16″ | 14.288 | |
| 0.09375 | 3/32″ | 2.381 | 0.59375 | 19/32″ | 15.081 | |
| 0.125 | 1/8″ | 3.175 | 0.625 | 5/8″ | 15.875 | |
| 0.15625 | 5/32″ | 3.969 | 0.65625 | 21/32″ | 16.669 | |
| 0.1875 | 3/16″ | 4.763 | 0.6875 | 11/16″ | 17.463 | |
| 0.21875 | 7/32″ | 5.556 | 0.71875 | 23/32″ | 18.256 | |
| 0.25 | 1/4″ | 6.35 | 0.75 | 3/4″ | 19.05 | |
| 0.28125 | 9/32″ | 7.144 | 0.78125 | 25/32″ | 19.844 | |
| 0.3125 | 5/16″ | 7.938 | 0.8125 | 13/16″ | 20.638 | |
| 0.34375 | 11/32″ | 8.731 | 0.84375 | 27/32″ | 21.431 | |
| 0.375 | 3/8″ | 9.525 | 0.875 | 7/8″ | 22.225 | |
| 0.40625 | 13/32″ | 10.319 | 0.90625 | 29/32″ | 23.019 | |
| 0.4375 | 7/16″ | 11.113 | 0.9375 | 15/16″ | 23.813 | |
| 0.46875 | 15/32″ | 11.906 | 0.969 | 31/32″ | 24.606 | |
| 0.5 | 1/2″ | 12.7 | 1 | 1 | 25.4 | |
Metric Equivalents
Width
- Microns x 0.00003937 = inches
- MM x 0.03937 = inches
- Cm x 0.3937 = inches
Length
- Meters x 3.2808 = feet
- Meters x 39.37 = Inches
Thickness
- Microns x 3.397 = Gauge
- Mils x 100 = Gauge
- Inches x 100,000 = Gauge
Area
- Square feet x 144 = square inches
- Square yards x 1296 = square inches
- Ream x 432,000 = square inches
Film Yield Chart
| Film Type | Density | Yield of 1 mil Film | Unit Weight of 1 mil Film | ||
| g/cc | in²/lb | m²/kg | lb/ream | g/m² | |
| OPP | 0.906 | 30,600 | 43.5 | 14.1 | 23 |
| LLDPE (linear low Density polyethylene) | 0.92 | 30,100 | 42.7 | 14.4 | 23.4 |
| HDPE (high density polyethylene) | 0.95 | 29,200 | 41.5 | 14.8 | 24.1 |
| Hicor OHD (oriented high density polyethylene) | 0.96 | 28,900 | 41 | 15 | 24.4 |
| Biax Nylon | 1.16 | 23,900 | 33.9 | 18.1 | 29.5 |
| OPET (oriented polyester) | 1.39 | 19,900 | 28.3 | 21.7 | 35.5 |
| Cellophane | 1.45 | 19,100 | 27.1 | 22.6 | 36.9 |
