Unit Conversion

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  UNITS AND CONVERSIONS Item USCS Units SI Units USCS to SI Conversion SI to USCS Conversion Mass slug (slug) kilogram (kg) 1 slug = 14.594 kg 1 kg = 0.0685 slug1 US ton = 2000 lb metric ton (t) = 1000 kg 1 US ton = 0.9072 t 1 t = 1.1023 US ton1 long ton = 2240 lb 1 long ton = 1.016 t 1 t = 0.9842 long tonWeight pound (lb) Newton (N) 1 lb = 4.4482 N 1 kg = 2.205 lbLength inch (in) millimeter (mm) 1 in = 25.4 mm 1 mm = 0.0394 in1 foot (ft) = 12 in 1 meter (m) = 1000 mm 1 ft = 0.3048 m 1 m = 3.2808 ft 1 mile (mi) = 5280 ft 1 kilometer (km) = 1000 m 1 mi = 1.609 km 1 km = 0.6214 miArea square foot (ft  2 ) square meter (m 2 ) 1 ft  2 = 0.0929 m 2 1 m 2 = 10.764 ft  2 1 acre = 43,560 ft  2 1 hectare (ha) = 10,000 m 2 1 acre = 0.4047 ha 1 ha = 2.4711 acreVolume cubic inch (in 3 ) cubic millimeter (mm 3 ) 1 in 3 = 16387.0 mm 3 1 mm 3 = 6.1  ×  10 − 5 in 3 cubic foot (ft  3 ) 1 liter (L) = 1000 cm 3 (cc) 1 ft  3 = 0.02832 m 3 1 m 3 = 35.3134 ft  3 1 US gallon (gal) = 231 in 3 1 cubic meter (m 3 ) = 1000 L 1 gal = 3.785 L 1 L = 0.2642 gal1 barrel (bbl) = 42 gal 1 bbl = 158.97 L = 0.15897 m 3 1 m 3 = 6.2905 bbl1 ft  3 = 7.4805 gal1 bbl = 5.6146 ft  3 Density slug per cubic foot (slug/ft  3 ) kilogram/cubic meter (kg/m 3 ) 1 slug/ft  3 = 515.38 kg/m 3 1 kg/m 3 = 0.0019 slug/ft  3 Specificweight pound per cubic foot (lb/ft  3 ) Newton per cubic meter (N/m 3 ) 1 lb/ft  3 = 157.09 N/m 3 1 N/m 3 = 0.0064 lb/ft  3 Viscosity(dynamic)slug/ft  · s 1 poise (P) = 0.1 Pa · s 1 cP = 6.7197  ×  10 − 4 lb/ft  · slb · s/ft  2 1 centipoise (cP) = 0.01 P 1 lb · s/ft  2 = 47.88 N · s/m 2 1 N · s/m 2 = 0.0209 lb · s/ft  2 1 poise = 1 dyne · s/cm 2 1 lb · s/ft  2 = 478.8 Poise 1 Poise = 0.00209 lb · s/ft  2 1 poise = 0.1 N · s/m 2 Viscosity(kinematic)ft  2  /s m 2  /s 1 ft  2  /s = 0.092903 m 2  /s 1 m 2  /s = 10.7639 ft  2  /sSSU*, SSF* stoke (S), centistoke (cSt) 1 cSt = 1.076  ×  10 − 5 ft  2  /sFlow rate cubic foot/second (ft  3  /s) liter/minute (L/min) 1 gal/min = 3.785 L/min 1 L/min = 0.2642 gal/mingallon/minute (gal/min) cubic meter/hour (m 3  /h) 1 bbl/h = 0.159 m 3  /h 1 m 3  /h = 6.2905 bbl/hbarrel/hour (bbl/h), bbl/dayForce pound (lb) Newton (N) = kg · m/s 2 1 lb = 4.4482 N 1 N = 0.2248 lb( Continued  )  A    p   p e n d   i     x 1    4   8   5    Item USCS Units SI Units USCS to SI Conversion SI to USCS Conversion Pressure pound/square inch, lb/in 2 (psi) pascal (Pa) = N/m 2 1 psi = 6.895 kPa 1 kPa = 0.145 psi1 lb/ft  2 = 144 psi 1 kilopascal (kPa) = 1000 Pa1 megapascal (MPa) = 1000 kPa1 bar = 100 kPa 1 psi = 0.069 bar 1 Bar = 14.5 psikilogram/sq. centimeter (kg/cm 2 ) 1 psi = 0.0703 kg/cm 2 1 kg/cm 2 = 14.22 psiVelocity foot/second (ft/s) meter/second (m/s) 1 ft/s = 0.3048 m/s 1 m/s = 3.281 ft/smile/hour (mi/h) = 1.4667 ft/sWork and energy foot-pound (ft  · lb) joule (J) = N · m 1 Btu = 1055.0 J 1 kJ = 0.9478 BtuBritish Thermal Unit (Btu)1 Btu = 778 ft  · lbPower ft  · lb/min joule/second (J/s) 1 Btu/h = 0.2931 W 1 W = 3.4121 Btu/hBtu/h watt (W) = J/sHorsepower (HP) 1 kilowatt (kW) = 1000 W 1 HP = 0.746 kW 1 kW = 1.3405 HP1 HP = 33,000 ft  · lb/minTemperature degree Fahrenheit ( ° F) degree Celsius ( ° C) 1 ° F = 9/5 ° C + 32 1 ° C = ( ° F  −  32)/1.81 degree Rankin ( ° R) =  ° F + 460 1 Kelvin (K) =  ° C + 273 1 ° R = 1.8 K 1 K =  ° R/1.8ThermalconductivityBtu/h/ft/  ° F W/m/  ° C 1 Btu/h/ft/  ° F = 1.7307 W/m/  ° C 1 W/m/  ° C = 0.5778 Btu/h/ft/FHeat transfercoefficient Btu/h/ft  2  /  ° F W/m 2  /C 1 Btu/h/ft  2  /F = 5.6781 W/m 2  /C 1 W/m 2  /C = 0.1761 Btu/h/ft  2  /FSpecific heat Btu/lb/  ° F kJ/kg/  ° C 1 Btu/lb/  ° F = 4.1869 kJ/kg/  ° C 1 kJ/kg/  ° C = 0.2388 Btu/lb/F * Kinematic viscosity in SSU and SSF are converted to viscosity in cSt using the following formulas: Centistokes  =  0 : 226 × SSU − 195/SSU for 32 ≤ SSU ≤ 100 (A1.1)Centistokes  =  0 : 220 × SSU − 135/SSU for SSU > 100 (A1.2)Centistokes  =  2 : 24 × SSF − 184/SSF for 25 ≤ SSF ≤ 40 (A1.3)Centistokes  =  2 : 16 × SSF − 60/SSF for SSF > 40 (A1.4)  A    p   p e n d   i     x 1    4   8   6  
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