公制与英制的格式转换

Energy Efficient Building Design College of Architecture Illinois Institute of Technology(IIT)Chicago

Input Multiply Output Input Multiply Output Input Multiply Output

Units By Units Units By Units Units By Units

(k=1,000,m=1,000,000)

Length Calorific Values(volume basis)Horse-Power

ft0.3048m btu/ft337.259k-J/m3hp boiler13.15hp electric

in 2.54cm btu/ft38.899k-cal/m3hp boiler9.81kw

in0.0254m therms/ft33725.89m-J/m3hp electric0.076hp boiler

miles 1.60934km Coeff.Of Exp.(volumetric)hp electric 1.0143hp metric

yds0.9144m lbs/ft3.F28.833kgs/cm3.C hp electric746watts(J/sec)

Areas Heat Capacity(specific heat)hp electric0.746kw

ft/sec20.3048m/sec2btu/lb.F4186.8J/kg.C hp metric0.7355kw

acre0.004047sq.km Heat Flux Density(Q)(W=J/sec)Velocity

sq.ft0.0929sq.m btu/hr.ft2 3.1546W/m2ft/min0.508cm/sec

sq.in 6.4516sq.cm Thermal Conductivity(k)(W=J/sec)ft/min0.01829km/hr

es 2.59sq.km btu.ft/hr.ft2.F 1.731W/m.C ft/sec30.48cm/sec

sq.yd0.83613sq.m btu.in/hr.ft2.F0.14423W/m.C ft/sec 1.0973km/hr

Density Resistance/Length(R=1/k)ft/sec18.288m/min

lbs/ft30.01602kgs/liter F.ft2.hr/btu.ft0.578 C.m/W mph44.704cm/sec

lbs/ft316.0185kgs/m3 F.ft2.hr/btu.in 6.933 C.m/W mph 1.609344km/hr

lbs/in327.68gms/cm3Heat Transfer Coeff.(U)(W=J/sec)mph26.822m/min

lbs/in327679.9gms/liter btu/hr.ft2.F 5.6783W/m2.C mph0.4471m/sec

lbs/gal0.11983gms/cm3Conductance(C,h)(W=J/sec)knots0.5144m/sec

lbs/gal119.83kgs/m3btu/hr.ft2.F 5.6783W/m2.C mph0.869knots

lbs/gal0.11983kgs/liter Resistance(1/U,1/h,L/k,1/C)Volume Flow(gpm water)

Energy F.ft2.hr/btu0.1761 C.m2/W ft3/hr7.865791cm3/sec

btu251.996cals Pressure ft3/hr0.028317m3/hr

btu0.251996k-cals atmos10332.27kgf/m2ft3/hr0.47195liters/min

btu 1.0551kJ atmos1013.25millibars ft3/hr471.948cm3/sec

btu0.0002931kwh atmos101325N/m2(Pa)ft3/min 1.699m3/hr

btu1055.056watt-secs ft.H2o304.398kgf/m2ft3/min0.47195liters/sec

btu1054.728Joules(J)ft.H2o2985.13N/m2(Pa)ft3/min7.48052gpm

btu1054.728newton-m in.H2O25.367kgf/m2ft3/min62.3456lbs H2O/m

hp 2.648E6J or N-M in.H2O 2.487millibars gpm0.22713m3/hr

hp632.415k-cals in.H2O 1.865mm.Hg gpm 3.7854liters/min

therms 2.52E7cals in.H2O248.76N/m2(Pa)gpm3785.4cm3/sec

therms 1.055E8J or N-M in.Hg345.315kgf/m2gpm0.1337ft3/min

Enthalpy in.Hg25.4mm.Hg Volume(gals water)

btu/lb0.55555cals/gm in.Hg(60F)3376.8N/m2(Pa)ft328317cm3

btu/lb0.55555k-cals/kg in.Hg(32F)3386.39N/m2(Pa)ft30.028317m3

btu/lb 2.326J/gm lbsf/ft20.0004725atmos in316.3871cm3

btu/lb 2.326k-J/kg lbsf/ft20.4788millibars in3 1.6387E-5m3

Force(Weight)lbsf/ft2 4.88243kgf/m2in30.016387liters

oz28.349gms lbsf/ft20.35913mm.Hg yds30.7645m3

oz0.02835kgs lbsf/ft247.88N/m2(Pa)gals3785.41cm3

oz0.278newtons lbsf/in20.068046atmos gals0.003785m3

lbs 4.448newtons lbsf/in268.947millibars gals 3.78541liters

lbs0.4536kgs lbsf/in26894.76N/m2(Pa)oz29.57353cm3

lbs0.0004536metric tons atmos33.9ft H2O oz 2.96E-05m3

Mass Flow atmos29.921in.Hg oz0.029573liters

lbs/hr0.454kgs/hr ft.H2o62.345lbf/ft2in30.554oz

lbs/hr.ft20.001356kgs/sec.m2ft.H2o0.433lbf/in2ft37.481gals

lbs/sec.ft2 4.8824kgs/sec.m2lbsf/in2 2.31ft.H2O ft362.357lbs H2O

Mass Power gals128oz

lbs H2o0.000454m3(60F)btu/hr0.2931watts(J/sec)gals4quarts

tons long 1.016tons metric btu/hr0.000293kw quarts2pints

tons long1016.047kgs btu/min17.584watts(J/sec)Specific Volume

tons short907.185kgs btu/min0.017584kw ft3/lb62.428cm3/gm

tons long2240lbs hp boiler33472btu/hr ft3/lb0.06243m3/kg

tons short2000lbs hp electric2545.46btu/hr ft3/lb62.428liters/kg

Varkie C.Thomas,Ph.D.,P.E.Skidmore,Owings Merrill,LLP Arch-551(Fall-2002)Arch-552(Spring-2003)