常见单位转换关系式

1、常见单位转换关系式发布：2008-12-14 10:51 |作者：llljq |来源：管道与设备技术网url=Acceleration/urlfoot/second2, meter/second2, gal, galileo, inch/second21 m/s2=ft/s2=100 cm/s2 =inch per sec ond squared (in ch/s2)1 ft/s2 :=m/s2= cm/s21 g =m/s2 =ft/s2url=Area/urlacre, are, barn, foot2, hectare, in ch2, mile2, sect ion, meter2,

2、tow nship, yard2, hectares1 m2 = 1550 in2 = ft2 = yd2 = mile21 ft2 = m2 = 144 in2 = 0,1111 yd2 = mile21 in2 = cm2 = m2 = ft2 = yd2 = mile21 yd2 = m2 = 1,296 in2 = 9 ft2 = mile21 mile2 = m2 = in2 = ft2 =yd2=640 Acres1 acre = 1/640 mile2 = ha (Hectares) = 4, m2 =43,560 . = 4840 .1 km2 = 102 ha2 = 106

3、m2 = 1010 cm2 = 1012 mm21 ha (Hectare) = 104 m2 = 108 cm2 = 1010 mm2 = Acres1 cm2 = 10-4 m2 = in21 mm2 =1 tow nship =107 m21 sectio n = 106 m2url=De nsity/urlkg/cubic meter, gram/ce ntimeter3, lmb/cubic in ch, lbm/cubic foot, slug/cubic foot, kilogram/cubic meter, lbm/gallo n (US liq)Den sity Water

4、1,000 kg/m3 = Lbs./ = Lbs./Gal. = ./Gal.1 lb/ft3 = kg/m3 = g/cm3 =oz/in3 =oz/gal (Imperial) =oz/gal (U.S.) = lb/i n3=27 lb/yd3 = lb/gal (Imperial) = lb/gal= ton /yd31 slug/ft3 = kg/m31 kg/l = lb/ft31 kg/m3 = g/cm3 =oz/in3 =oz/gal (Imperial) = oz/gal (U.S.) = Ib/ft3 =lb/in3 =lb/yd3 = lb/gal (Imperial

5、) = lb/gal = to n/yd3url=E nergy/urlBritish Thermal Un it (Btu), calorie, joule, kilojoule, electro n volt, erg, foot lbf,foot poun dal, kilocalorie, kilowatt hour, watt hour,1 J (Joule) = 0,1020 kpm = kWh = kcal = ft lbf = 1 (kg m2)/s2 = 1 watt seco nd = 1Nm = 1 ft lb = Btu1 kpm = J = kWh = kcal=ft

6、lbf =Btu1 kWh = J = kpm = kcal=ftlbf =Btu1 kJ = 1 kNm = 1kWs = 103 J=Btu =ft lbf =kcal1 Btu (British thermal unit) = 1, J=kpm = kWh= kcal = ft lbf = ergs = 252 cal =watt hour1 cal = J1 kcal = 4186,8 J = 426,9 kp m = kWh = ft lbf = Btu = 1,000 cal1 ft lbf (foot pound force) = J = kp m = kWh = kcal =

7、Btu1 hp h (horse power hour) = J = kWh1 erg = 1 (g cm2)/s2 = 10-7 J1 eV = J1 Q = 1018 Btu = J1 Quad = 1015 Btu1 kg m = ft lb = Btu = Jouleurl=E nergy per un it mass/url1 kJ/kg = 1 J/g = Btu/ lbm = kcal/kgurl=Flow/url - see Volume flow url=Force/urldyne, kilogram force (kgf), kilopound force, kip,lbf

8、 (po und force), ounce force (avoirdupois), poun dal, n ewt on1 N (Newt on) =kp = pdl = lbf = lbf = 1 (kg m)/s2 = 105 dyn = 1/ kgf1 lbf (Po und force) = N = kp = pdl = dyn1 dyn = 1 (g cm)/s21 kg has a weight of 1 kp1 kp (Kilopo nd) =N = Ibf = pdl1 pdl (Pou ndal) =N = kp = Ibfurl=Heat flow rate/url1

9、Btu/sec = 1, W1 kW (kJ/s) = kpm/s = kcal/h = 3,413 Btu/h = hk = hp = 738 ft lb/s = 1,000 J/s =J/h1 kpm/s=kW=kcal/h=Btu/h =:hk =hp =ft lb/s1 kcal/h=kW=kpm/s=Btu/h =:hk =hp =ft lb/s1 Btu/h =kW =kpm/s = kcal/h :=hk =hp =ft lb/s1 kcal/h=kW1 hk (metric horse power)=kW =kpm/s =kcal/h=2,510 Btu/h =hp =ft l

10、b/s1 hp =kW =kpm/s =kcal/h = 2,545 Btu/h=hk=ft lb/s1 ft lb/s :=kW :=kpm/s := kcal/h :=Btu/h :=hk :=hpurl=Heat flux/url1 Btu/ft2 = kcal/m2 = J/m2K1 Btu/ ft2 h = W/m21 Btu/ft2 oF = kcal/m2K = J/m2K1 kcal/m2 = Btu/ft21 kcal/m2K = Btu/ft2oFurl=Heat gen erati on per un it volume/url1 Btu/ft3 =kcal/m3 =J/

11、m31 Btu/ft3 h =W/m31 kcal/m3 =Btu/ft3url=Heat gen erati on per un it mass/url1 Btu/lb = kcal/kg = 2,326 J/kg 1 kcal/kg = Btu/lburl=Heat tran sfer coefficie nt/url1 Btu/ft2 h oF =W/m2 K = kcal/h m2 oC1 W/m2K = kcal/h m2 oC =Btu/ ft2 h oF1 kcal/h m2 oC = W/m2K =Btu/ ft2 h oFurl=Hydraulic Gradie nts/ur

12、l1 ftH2O/100 ft =psi/100 ft =kPa/100 m = 1000 mmH2O/100 m1 psi/100 ft =ftH2O/100 ft = 2288 mmH2O/100 ft =kPa/100 murl=Le ngth/urlfeet, meters, cen timeters, kilometers, miles, furion gs, yards, micrometers, in ches,a ngstrom, cubit, fathom, foot, han d, league, light year, micron, mil, n autical mil

13、e, rod,1 m (meter) = ft = in = yd = mile1 km = mile = 3281 ft = 1094 yds1 in (in ch) = mm = cm = m = ft = yd = mile1 ft (foot) =m = 12 in = yd = mile = cm = mm1 mm = 10-3 m1 cm = 10-2 m = in = ft1 mm = in1 (ngstrm) =-10 m1 mile = km = 1, m = 63,346 in = 5,280 ft = 1,760 yd1 mil (Norway and Swede n)

14、= 10 kilometres1 nm (n autical mile) = 1,852 metres = mile = feet1 yd (yard) = m = 36 in = 3 ft = mile1 Furlo ng = 660 feet = 40 rods = 1/8 mile1 rod = yards1 land league = 3 miles1 Fathom = 6 feet = metersurl=Mass/url, weightpo un ds, kilograms, grams, oun ces, grains, tons (lo ng), tons (short), t

15、ons(metric), carat, grain, ounce mass, pound mass (lbm), slug, tonne1 kg = 1,000 g = lb = slug 1 lb = 16 oz = kg = g = 7000 grains = slug1 slug = kg = Ibm1 grain = lb = g1 g = gra ins = oz = lb1 to nne = 103 kg = 106 g = 109 mg = to ns1 qt = liters1 Ton = 2000 Lbs. = 907 kg1 long ton = 2240 pou nds1

16、 oz (ounce) = g = gra ins1 troy pound = 12 troy ounces1 scruple = 20 grains1 dram = 3 scruples1 apothecary ounce = 8 drams1 apothecary pound = 12 apothecary ounces1 penny weight = 24 grains1 Gal. H2O = Lbs. H2ODensity, Specific Weight and Specific Gravity - An introduction and definition of density,

17、 specific weight and specific gravity. Formulas with examples.url=Mass flow rate/url1 lb/h =kg/s1 lb/s =kg/s1 lb/min = kg/s = kg/s1 kg/s = 3,600 kg/h = lb/min1 kg/h = kg/s = lb/minMome nt of In ertia1 kg m2 = 10000 kg cm2 = 54675 ounce in2 = lb in2 = lb ft2url=Power/urlhorsepower, kilowatt, watt,btu

18、/sec ond, calorie/sec ond, foot lbf/sec ond,kilocalorie/sec ond1 W = 1 kg m2/s3 = 1 Nm/s = 1 J/s1 kW = 1,000 Watts = 3,412 Btu/h = 550 British hp = British hp = 103/ kgf m/s =ftlbf/s = 103/ 75) metric hp1 hp (En glish horse power) = W = kW = 550 ft lb/s = 2,545 Btu/h = ft lb/m = metric horse power =

19、 KVA1 metric horse power = 736 W = 75 kg m/s =En glish horse power1 refrigerati on Ton = 12,000 Btu/h cooli ng =kW = 3, k Calories/h1 cooling tower Ton = 15,000 Btu/h = 3,782 k Calories/h1 Therm = 100,000 Btu/h1 ft lb/s = W1 Btu/s = W1 Btu/h = 1 Btuh = W = MBHurl=Power per unit area/url1 W/m2 = Btu/

20、(h ft2) = kcal/(h m2)url=Pressure/urlatmosphere, cen timeters of mercury, foot of water, bar, barye, cen timeter of water, dyn e/ce ntimeter2, inch of mercury, inch of water, kgf/ce ntimeter2, kgf/meter2, lbf/foot2, lbf/in ch2 (psi), millibar, millimeter of mercury, pascal, torr, n ewto n/meter2Stan

21、 dard Atmospheric Pressure 1 atm = kN/m2 = kPa = psia = 0 psig = in Hg =760 torr = (Water Gauge) = Lbs./.1 N/m2 = 1 Pa = lb/in2 = 1x10-5 bar = in water = ft water = mm water = in mercury = mm mercury = kg/m2 = atm1 Pa = 10-6 N/mm2 = 10-5 bar = kp/m2 = m H2O = atm = psi (lbf/i n2)1 N/mm2 = 106 Pa = 1

22、0 bar = kp/m2 =m H2O=atm =psi (lbf/i n2)1 mmHg = 1 torr = lb/i n21 atm = 101,325 Pa (N/m2) = kN/m2 =kp/m2 =kp/cm2 =:bar =psi (lb/i n2)=in H2O at 62 0F oC) = ft H2O at 62 0FoC)=m H2O at 62 0F oC)=in mercuryat 62 0F oC) = 760 mm mercury at 62 0FoC)=760 torr1 bar = 105 Pa (N/m2) = N/mm2 = 10,197 kp/m2

23、:= m H2O=atm =psi (lbf/i n2)=106 dyn/cm2 = 750 mmHg1 kp/m2 = Pa (N/m2) = N/mm2 = 10-3 m H20 = 1 mm H20 = atm = psi (lb/in2)= in H2O = mm mercury1 psi (lb/i n2) = 144 psf (lbf/ft2) = 6, Pa (N/m2) = N/mm2 = bar = in H2O at 62oF = mm H2O at 62oF = in mercury at 62oF = mm mercury at 62oF = kg/m2 = atm =

24、 Ft. H2O = 16 oun ces1 psf (lbf/ft2) = N/m2 (Pa) = lbf/i n2 (psi)1 dyn/cm2 =lbf/i n21 in mercury (Hg) = 3, N/m2=lb/in2 = in water1 Ounce =1= psi = Lbs./.1 in water =N/m2= lb/i n2 = kg/m2 = in mercury1 m H2O = Pa = N/mm2 = bar = 1,000 kp/m2 = atm =psi (lbf/i n2)1 mm water = Pa (N/m2) = 1 kg/m2 = mm m

25、ercury = atm1 mm mercury = lb/i n2 = 133 N/m2 = mm waterurl=Rotati on /urlrevoluti ons,1 r/min (rpm) = r/s = rad/s1 r/s = 60 r/min = rad/s1 rad/s = r/min (rpm) = r/s (rps)url=Specific en ergy/url, en thalpy, en tropy1 Btu/lbm = 2, J/kg = kcal/kg = ft lbf / lbm =10-4 hp hr / lbm = lbf/i n2 / lbm/ft3

26、=kp m / g =10-4 kcal/g = kJ/kg1 J/kg = Btu/lbm = kcal/kg1 kcal/kg = Btu/lbm = 4,187 J/kgurl=Specific heat capacity/url1 J/(kg K) = kcal/(kg oC) = Btu/(lbm oF)1 kJ/(kg K) = kcal/(kg oC) = Btu/(lbm oF)1 Btu/(lbm oF) = 4, J/ (kg K) = 1 kcal/(kg oC)1 kcal/(kg oC) = 4, J/ (kg K) = 1 Btu/(lbm oF)url=Speci

27、fic Volume/url1 m3/kg =ft3/lbm = 27680 in 3/lbm =US gal/lbm=1000 liter/kg1 liter/kg =ft3/lbm =in 3/lbm =US gal/lbm =m3/kg1 ft3/lbm =:1728 in 3/lbm :=US gal/lbm=liter/kg =m3/kg1 in 3/lbm :=ft3/lbm =US gal/lbm =liter/kg =m3/kg1 US gal/lbm = ft3/lbm :=231 in 3/lbm =liter/kg =m3/kgurl=Temperature/urlcel

28、sius, rankine, kelv in, cen tigrade, fahre nheit.1 oC = oF1 oF = oC0 oC correspo nds to 32 oF,K and RT(oR) = (9/5)T(K)T(oF) = T(oC)(9/5) + 32T(oF) = T(K) - (9/5) + 32T(oC) = 5/9T(oF) - 32url=Thermal con ductivity/url1 W/(m K) = kcal/(h m oC) = Btu/(ft h oF)1 Btu/(ft h oF) = W/(m K) = kcal/(h m oC)1

29、kcal/(h m oC) = W/(m K) = Btu/(ft h oF)url=Thermal diffusivity/url1 ft2 /s =m2/s1 ft2 /h =m2/surl=Thermal resista nce/url1 (h oF)/Btu = K/Wurl=Time/urlyear, mon th, day, hour, minu te, sec ond, millisec ond1 h = 3,600 s = 60 min1 ms (milliseco nd) = 10-3 s1 s (microsecond) = 1-6 s1 ns(nanosecond) =

30、10-9 surl=Torque, Mome nt/urlfoot-po und torque, n ewt on-meter1 ft lb = Nmft/s =url=Velocity/url, speedfoot/sec ond, in ch/sec ond, meter/sec ond, kilometer/hour, knot, mile/hour, nautical mile per hourm/s =km/h=mphm/s =km/h =88 ft/min =5280 ft/hr =Ft./sec.=knotskm/h =ft/min := mphm/s =ft/min := mp

31、h =knotm/sft/min =mph =m/s =km/h =kn ot (nautical mile per hour)=m/s = kilometers per hour = miles per hour= 1n autical miles per hour 1 League = Milesurl=Viscosity dyn amic/url1 lb/(ft s) = Pa s = P = 1,488 cP =kp s/m21 cP (Ce ntipoise) = 10-3 Pa s = P =kp s/m2=lb/(ft s)= (N s)/m21 kg/(m s ) = 1 (N

32、 s)/m2 = lbm/(ft s) = 10 Poise1 P (Poise) = Pa s = 100 cP = kp s/m2 = lb/(ft s) = kg/ms1 Pa s (N s/m2) = 10 P (Poise) = 103 cP = kp s/m2 =lb/(ft s)1 kp s/m2 = Pa s = P = 9,807 cP =lb/(ft s)1 rey ns = 1 1bf s/in2 = Pa sDynamic, Absolute and Kinematic Viscosity - An introduction to dynamic, absolute a

33、nd kin ematic viscosity and how to con vert betwee n Cen tiStokes (cSt), Cen tiPoises (cP), Saybolt Uni versal Seconds (SSU) and degree En gler.url=Viscosity kin ematic/url1 ft2/s = m2/s 1 ft2/ h = s1 St (Stokes) = 1x10-4 m2/s = 100 cSt = ft2/s1 m2/s = 104 St = 106 cSt = ft2/s= 38750 ft2/h1 cSt (Ce

34、ntistokes) = 10-6 m2/s = St = ft2/surl=Volume/urlbarrel, gall on, cubic cen timeter (cm3), cubic feet (foot3), cubic inch (in ch3),cubic meter (meter3), cubic yard (yard3), quarts, liters, acre foot, board foot, bushel, cord, cup,dram, fluid oun ce, peck, pint, quart, tablespo on, teaspo on,1 ft3 =m

35、3=dm3 =yd3 =Imp. gal (UK)=gal (US)=:1,728 .1 in3 = m3 =dm3 (liter)=cm3 = 16390 mm3 = ft31 Gallo n (U.S.)=m3 =dm3 (liter)=ft3 =yd3 = Imp. gal (UK) = 4 Quarts = 8Pi nts1 Imp. gal (UK)=m3 =dm3=ft3 =yd3 =:gal (US)1 dm3 (Liter)=10-3 m3=ft3 :=yd3=Imp gal (UK)=Gallo ns (US) = Quarts :Pi nts1 yd3 = m3 =dm3 =27 ft3 =Imp. gal (UK)=gal (US)=46,656 . = 1616 Pints :Quarts = Liters1 pin t (pt) = dm3 (liter) = 16 fl. oz. (fluid ounce) = in31 km3 = 109 m3 = 1012 dm3 (liter) = 1015 cm3 = 1018 mm31 cm3 = in31 m3 = 103 dm3