Factores de Conversin de UnidadesLongitud (L)1 Pulgada (in) = 2,540 cm = 25,40 mm1 Pie (ft) = 12 pulg. = 30,48 cm = 0,3048 m1 Yarda (yd) = 3 pies1 mm = 0,03937 pulg = 0,00328 pies1 micra (mi) = 10-6 m1 Angstrom= 10-10 mMasa (m)1 Kilogramo (kg) = 2,205 lb (anglosajonas)1 Libra (lb), (anglosajona) = 16 onzas (oz) = 453,6 gramos (gr) = 7000 granos1 Tonelada (Ton), (corta o americana) = 2000 lb (anglosajona)1 Tonelada (Ton), (larga, bruta o inglesa) = 2240 lb (anglosajona)1 Tonelada Mtrica (Ton) = 1000 kg = 2204,6 lb (anglosajona)1 Kilogramo (kg) = 2,2046 lb (anglosajona)1 Gramo (gr) = 15,43 granosDensidad (D)1 lb/pulg3 = 27,38 gr/cm31 gr/cm3 = 0,03613 lb/pulg31 lb/pie3 = 16,0184 kg/m31 kg/m3 = 0,06243 lb/pie3Volumen (V)1 pulg3 = 16,39 cm31 litro = 61,03 pie3 = 1000,028 cm31 pie3 = 28,32 litros = 7,481 Gal (americano)1 m3 = 1,308 yd3 = 1000 litros1 Galn (Gal), (americano) = 4 cuartos o cuartillos = 3,785 litros = 231 pulg31 Galn (Gal), (britnico) = 277,42 pulg3 = 1,20094 Gal (americano)Presin (P)1 lb por pulg2 (psi) = 2,036 pulg de Hg (0C) = 2,311 pies de agua (70F)1 atmsfera (atm) = 14,396 psi = 760 mm de Hg (0C) = 29,921 pulg de Hg (0C)1 atmsfera (atm) = 1,033 kg f/cm2 = 1,01325x106 dinas/cm21 micra de Hg = 1x10-3 mm de Hg = 1,933x10-5 lbf/pulg2Equivalentes de Temperatura (T,T)Grados Fahrenheit (F) = 1,8 grados centgrados (C) + 32Grados Kelvin (K) = grados centgrados (C) + 273,16Grados Rankine (R) = grados fahrenheit (F) + 459,69Grados Rankine (R) = 1,8 grados Kelvin (K)

C =K = variacin de temperatura

F = (5/9)C t= temperatura no absoluta.

R = (5/9)R T = temperatura absoluta

F =RPotencia (P)1 kilovatio (Kw) = 102 kgf-m/s = 44240 lbf-pie/min1 kilovatio (Kw) = 56,87 BTU/min = 1,341 HP1 caballo de vapor (HP) = 550 lbf-pie/s = 76,04 kgf-m/s = 33000 lbf-pie/min1 caballo de vapor (HP) = 42,417 BTU/min = 2 545 BTU/hora.1 vatio o watt = 44,25 lbf-pie/min = cal/min = 1,341x10-3 HPCalor (Q)1 BTU = 252 cal = 1,0544x103 joule = 778,26 lbf-pie1 atm - litro = 24,2 caloras (cal)1 kilowatio-hora (kw-h) = 860 Kcal = 3412 BTU = 3,67x105 kgf-m1 HP-h = 641,1 kcal = 2545 BTU = 2,74x105 kgf-mEquivalente Mecnico del calor (J) = 778 lbf-pie/BTU = 426,8 kgf-m/kcal = 4,186 Joule/calFuerza (F)1 libra-fuerza (lbf) = 4,4482 Newton (Nw)1 Newton (Nw) =1 Dina =Energa Mecnica (Em)1 Joul = 107 Ergios (erg) = 1 watt-seg1 Electron-Voltio (ev) = 1,608x10-12 erg = 1,18x10-19 lbf-pieViscosidad ()a) Viscosidad Dinmica o Absoluta1 Poise =centipoise1 Poise1Poiseb) Viscosidad Cinemtica1 Stoke = 1100 centistokes1StokesConstantes MatemticasBase de los logaritmos naturales (e) = 2,71832,72Pi () = 3,1415923,1416Logaritmo Natural de N = LnNLogaritmo Vulgar de N (Base 10) = LogNLnN = 2,303.LogNConstantes FsicasConstante R de la ecuacin de los gases:Valor Numrico: Unidades1,987 Cal/gmol.K1,987 BTU/lbmol.R82,06 cm3.atm/gmol.R0,08205 litros.atm/gmol.K10,731 pie3.psi/lbmol.R0,7302 pie3.atm/lbmol.R8,314 m3.Pa/gmol.K8,314 Joul/gmol.K847,7 kgf.m/kgmol.K1545 lbf.pie/lbmol.R1 Pascal (Pa) = Nw/m21 Faraday = 96493,1 coulombio absoluto/equivalente-gramo1. LONGITUDUnidadcmm (SI)kmpulg.pieyardamilla

1 cm10,010,000010,3937010,03280830,01093616,21371 E-6

1 m (SI)10010,00139,37013,280841,093616,21371 E-4

1 km1,0 E+5100013,93701 E+43280,41093,60,621371

1 pulg.2,540,02542,54 E-510,083330,0277781,57828 E-5

1 pie30,480,30483,048 E-41210,3333331,8939 E-4

1 yarda91,440,91449,144 E-436315,6818 E-4

1 milla1,60934 E+51609,341,609346,336 E+4528017601

2. SUPERFICIEUnidadcm2m2(SI)km2pulg.2pie2yarda2milla2

1 cm211,0 E-41,0 E-100,15501,0764 E-31,1960 E-43,8611 E-11

1 m2(SI)1,0 E+411,0 E-61550,010,76391,195983,8611 E-7

1 km21,0 E+101,0 E+611,5500 E+091,07610 E+71,1960 E+60,38611

1 pulg.26,45166,4516 E-46,4616 E-1016,9444 E-37,7161 E-42,4910 E-10

1 pie2929,030,0929039,2903 E-814410,111113,5868 E-8

1 yarda28,3613 E+30,836138,3613 E-71296913,2283 E-7

1 milla22,5900 E+102,5900 E+62,589984,0145 E+92,7878 E+73,0976 E+61

3. VOLUMENUnidadcm3litrom3(SI)pulg.3pie3galn

1 cm310,0011,0 E-66,1024 E-23,5315 E-52,6417 E-4

1 litro100010,00161,0243,5315 E-20,26417

1 m3(SI)1,0 E+6100016102,435,315264,17

1 pulg.316,38711,6387 E-21,6387 E-515,7870 E-44,3290 E-3

1 pie32,8317 E+428,31682,8317 E-2172817,4805

1 galn3785,43,78543,7854 E-3231,000,133681

4. MASAUnidadgkg (SI)ton. mtr.onzalbton. corta

1 gramo10,0011,0 E-63,5274 E-22,2046 E-31,1023 E-6

1 kilogramo100010,00135,2742,20461,1023 E-3

1 ton. mtr.1,0 E+6100013,5274 E+42204,61,1023

1 onza28,3492,8349 E-22,8349 E-510,062503,1250 E-5

1 libra453,590,453594,5359 E-41615,0000 E-4

1 ton corta9,0718 E+5907,180,907183,2000 E+420001

5. DENSIDADUnidadg/cm3g/lkg/m3(SI)lb/pie3lb/galn

1 g/cm311000100062,42808,34540

1 g/l0,00111,0006,2428 E-28,3454 E-3

1 kg/m3(SI)0,0011,00016,2428 E-28,3454 E-3

1 lb/pie31,6018 E-216,018516,018510,13368

1 lb/galn0,119826119,826119,8267,480521

6. PRESIONUnidadatm.barkgf/cm2lbf/pulg.2mmHgpascal (SI)pulg. H2O

1 atmsfera11,013251,0332314,6967601,01325 E+5406,782

1 bar0,98692311,0197214,5038750,0641,0 E+5401,463

1 kgf/cm20,9678410.980665114,2233735,5619,80665 E+4393,701

1 lbf/pulg.26,8046 E-26,8948 E-27,0307E-2151,71516894,7627,6799

1 mmHg1,3158 E-31,3332 E-31,3595 E-31,9337 E-21133,3220,535239

1 pascal (SI)9,8692 E-61,0 E-51,0197 E-51,4504 E-47,5006 E-314,0146 E-3

1 pulg.H2O2,4583 E-32,4909 E-32,5400 E-33,6127 E-21,86833249,0891

8. POTENCIAUnidadBTU/hrhpkcal/hrkWpie-lbf/sW (SI)

1 BTU/hr13,93015 E-40,2521642,93071 E-40,2161580,293071

1 hp2544,431641,6160,745700550,0745,700

1 kcal/hr3,965671,55857 E-311,16222 E-30,8572111,16222

1 kilowatt3412,141,34102860,4211737,5621000

1 pie-lbf/s4,626241,81818 E-31,166571,3558 E-311,35582

1 watt (SI)3,412141,34102 E-30,8604210,0010,7375621

7. ENERGIAUnidadBTUcalhp-hrJ (SI)kW-hrl-atm.pie-lbf

1 BTU1252,1643,93015 E-41055,0562,9307 E-410,4126778,169

1 calora3,96567 E-311,55856 E-64,18401,16222 E-64,1293 E-23,08596

1 hp-hr2544,436,4162 E+512,68452 E+60,745702,6494 E+41,9800 E+6

1 joule (SI)9,47817 E-40,2390063,72506 E-712,77778 E-79,8692 E-30,737562

1 kW-hr3412,148,60421 E+51,341023,6 E+613,5529 E+42,6552 E+6

1 litro-atm.9,6038 E-224,21733,7744 E-5101,3252,8146 E-5174,7335

1 pie-lbf1,2851 E-30,3240485,0505 E-71,355823,7662 E-71,3381 E -21

9. ENERGIA ESPECIFICAUnidadBTU/lbcal/gJ/gJ/kg (SI)

1 BTU/lb10,5559272,326002326,00

1 cal/g1,7988014,1844184

1 J/g0,4299230,23900611000

1 J/kg (SI)4,29923 E-42,39006 E-40,0011

10. CAPACIDAD CALORIFICA Y ENTROPIA ESPECIFICAUnidadBTU/lb Fcal/g CJ/g KJ/kg K (SI)

1 BTU/lbF11,000674,186804186,80

1 cal/g C0,99933014,1844184

1 J/g K0,2388460,23900611000

1 J/kg K (SI)2,38846 E-42,39006 E-40,0011