Common Units of Measure and Conversion Factors

Area measurements in square inches, square feet, square meters, square kilometers, square yards, and weight conversions between pounds, kilograms, metric tons. Learn about basis weight, converting weight to area, converting area to weight, and measuring thickness in mils, microns, and points. Helpful equations provided.

• Measurement
• Area
• Weight
• Conversion
• Thickness

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1. Common Units of Measure and Conversion Factors

2. Area (Length x Width) SQI-square inches (in ) SQF-square feet (144 in ) MSI-thousand square inches (1000 in ) MSF-thousand square feet (144,000 in ) SYD-square yards (1,296 in ) SQM-square meter (1,550 in ) SQKM-square kilometer (1,550,000 in )

3. Weight LBS pounds MLBS-thousand pounds Ton-two thousand pounds KG-kilogram (2.2 lbs) MT-Metric tonne (1000 kg)

4. Basis Weight (Weight/Unit Area) Common units: LBS/RM- Pounds per Ream 36 x24 x500 ream basis 3,000 SQ FT 432,000 SQ IN GSM- Grams per Square Meter 1 LB/RM= 1.63 GSM (i.e. 3.1 LB/RM= 5 GSM) 1 GSM= 0.61 LB/RM (i.e. 5 GSM= 3.1 LB/RM) Yield is the Inverse of basis weight (Sqi/Lb or M /Kg)

5. Basic Measures | Converting Weight to Area To convert weight to area requires three pieces of information: 1. Weight (lb) 2. Basis Weight (lb/rm) 3. Width (inches) Basis Equation: Linear Feet=(Weight)/(Basis Weight*Width*12) Linear Yards=(Weight)/(Basis Weight*Width*36) Linear Meters=(Weight)/(Basis Weight*Width*39.37)

6. Basic Measures | Converting Area to Weight To convert area to weight requires three pieces of information: 1. Area (Sqi) 2. Basis Weight (lb/rm) 3. Width (inches) Basis Equation: Pounds=(Area*Basis Weight)/432,000 Kilograms=(Area*Basis Weight)/950,400

7. Basic Measures | Thickness (Caliper) Thickness also referred to as caliper Imperial (English) units Mil .001 (one thousandth of an inch) Referred to as Gauge for film (100 GA= .001 ) Referred to as Point for board (8 PT= .008 ) Metric units Micron 25.4 Micron= 1 mil=.001 =.0254mm .000235 foil = 6um = .006mm