AppB_Scharff 9/21/00 11:29 AM Page 531 APPENDIX B Metric Conversion Guide for the Roofer 531 AppB_Scharff 9/21/00 11:29 AM Page 532 532 APPENDIX B Property To convert from Symbol Application rate U.S. gallon per square gal (U.S.)/100 ft2 U.K. gallon per square gal (U.K.)/100 ft2 Area square inch in.2 square foot ft2 square 100 ft2 Breaking strength pound force per inch width lbf/in. Coverage square foot per U.S. gallon ft2/gal square foot per U.K. gallon ft2/gal Density, or mass pound per cubic foot lb/ft3 per unit volume Energy or work kilowatt-hour kWh British thermal unit Btu Flow, or volume U.S. gallon per minute gpm per unit time U.K. gallon per minute gpm Force pound force lbf kilogram force kgf Heat flow thermal conductance, C Btu/hиft2и°F thermal conductivity, k Btuиin./hиft2и°F Incline inch per foot in./ft Length, width, mil 0.001 in. thickness inch (up to ϳ48 in.) in. foot (ϳ4 ft and above) ft *Exact conversion factor. AppB_Scharff 9/21/00 11:29 AM Page 533 METRIC CONVERSION GUIDE FOR THE ROOFER 533 to Symbol Multiply by Remarks liter per square L/m2 0.4075 ϭ 0.4075 mm thick meter liter per square L/m2 0.4893 ϭ 0.4893 mm thick meter square millimeter mm2 645.2 1,000,000 mm2 ϭ 1 m2 square meter m2 0.09290 square meter m2 9.290 kilonewton per kN/m 0.175 meter width square meter m2/L 0.02454 per liter square meter m2/L 0.02044 per liter kilogram per kg/m3 16.02 water ϭ 1000 kg/m3 cubic meter megajoule MJ 3.600* J ϭ Wиs ϭ Nиm joule J 1055 cubic centimeter cm3/s 63.09 or 0.0631 L/s per second cubic centimeter cm3/s 75.77 or 0.0758 L/s per second newton N 4.4448 N ϭ kgиm/s2 newton N 9.807 watt per square W/m2иK 5.678 meter kelvin watt per meter W/mиK 0.1442 kelvin percent % 8.333 3 in./ft ϭ 25% micrometer ␮m 25.40* 1000 ␮m ϭ 1 mm millimeter mm 25.40* 1000 mm ϭ 1 m meter m 0.3048* AppB_Scharff 9/21/00 11:29 AM Page 534 534 APPENDIX B Property To convert from Symbol Mass (weight) ounce oz pound lb short ton 2000 lb Mass per unit area pound per square foot lb/ft2 pound per square foot lb/ft2 pound per square foot lb/1000 ft2 ounce per square yard oz/yd2 Permeability at 23°C perm inch grainиin./ft2иhиin. Hg Permeance at perm grain/ft2иhиin. Hg 23°C Power horsepower hp Pressure or stress pound force per square inch lbf/in.2 or psi pound force per square foot lbf/ft2 or psf Temperature degree Fahrenheit °F degree Celsius °C Thread count (fabric) threads per inch width threads/in. Velocity (speed) foot per minute ft/min or fpm mile per hour m/h or mph Volume U.S. gallon gal (U.S.) U.K. gallon gal (U.K.) cubic foot ft3 cubic yard yd3 *Exact conversion factor. AppB_Scharff 9/21/00 11:29 AM Page 535 METRIC CONVERSION GUIDE FOR THE ROOFER 535 to Symbol Multiply by Remarks gram g 28.35 1000 g ϭ 1 kg kilogram kg 0.4536 1000 kg ϭ 1 Mg megagram Mg 0.9072 kilogram per kg/m2 4.882 square meter gram per square g/m2 4882 meter gram per square g/m2 48.82 meter gram per square g/m2 33.91 meter nanogram/pascal ng/Paиsиm2 1.459 ng ϭ 1012 kg second square meter nanogram/pascal ng/Paиsиm 57.45 1 grain ϭ 64 mg second meter watt W 746 W ϭ Nиm/s ϭ J/s kilopascal kPa 6.895 Pa ϭ N/m2 pascal Pa 47.88 degree Celsius °C (t Ϫ 32)/1.8* 32°F ϭ 0°C F kelvin K t ϩ 273.15* 273.15 K ϭ 0°C C threads per threads/cm 0.394 centimeter width meter per second m/s 0.005080* kilometer per hour km/h 1.609 cubic meter m3 0.003785 or 3.785 L cubic meter m3 0.004546 or 4.546 L cubic meter m3 0.02832 cubic meter m3 0.7646.