This document provides conversion factors for various units of measurement related to mass and density, length, area, volume, force, pressure, energy, temperature, and specific volume. Some key conversions include: 1 kg = 2.20462 lbs, 1 m = 3.28084 ft, 1 cal = 4.1868 kJ, 1 kWh = 3412.14 Btu, 1 hp = 0.7457 kW, 1 kJ/kg = 0.42992 Btu/lb. The document covers conversions between metric and imperial units for several physical quantities important for engineering such as force, pressure, power, heat, and temperature.

1. FACTORES DE CONVERSIÓN
Abril 2016-Prof. Frank Bello Castillo
Masa y densidad
1 kg =1000 gr=2.2046 Lbm
1 Lbm =0.4536 kg=453.6 gr
1 gr/cm3
=62.428 Lb/pie3
1 gr/cm3
=103
Kg/m3
1 Lbm/pie3
=0.016018 gr/cm3
1Lbm/pie3
=16.018 kg/m3
Longitud 1 cm=0.397 pulg
1 m= 3.2808 pie
1 milla =1609.3 m
1 pulg=2.54 cm
1 pie=0.304 m
1 milla =5280 pie
Area 1 m2
= 104
cm2
=106
mm2
1 m2
=10.764 pie2
1pie2
=144 pulg2
1 pulg2
=6.4516 cm2
Velocidad 1 m/seg =3.6 km/hr
1 Km/hr =0.62137 milla/hr
1 pie/seg = 0.304 m/seg
Volumen 1 cm3
= 0.061024 pulg3
1 m3
=35.315 pie3
1 m3
=1000 Litros
1 m3
=6.1024x104
Pulg3
1 pulg3
=16.387 cm3
1 gal =0.13368 pie3
1 gal =3.7854x10-3
m3
1 pie3
=1728 Pulg3
Fuerza 1 Nw =1 Kg.m/s2
1 Nw =0.2248 Lbf
1 Lbf =32.17 Lbm.pie/s2
1 Lbf =4.4482 Nw
Presión 1 MPa =1000 kPa=106
Pa
1 Pa =1 Nw/m2
=1.45x10-4 psi
1Atm=1.01325 =101.325 kPa
1 Bar =100 kPa
1 Atm =10.33 m H2O
1 psi =6.8948 kPa
1 psi = 144 Lbf/pie2
1 Atm =14.696 psia= 760 mmHg
1 Atm = 29.92 pulg. Hg
1 Atm=1.033 Kgf/cm2
Energía
(calor y trabajo)
1 J =1 Nw.m =0.735756 Lbf.pie
1 kJ =1000 J=1 kPa.m3
1 kJ =737.56 Lbf.pie
1 kJ=0.9478 Btu
1 psia.pie3
=0.185 Btu
1 Btu=778.17 Lbf.pie
1 Btu =1.0051 kJ
1 Lbf.pie = 1.35582 J
1 kWhr =3412.14 Btu
1 kcal = 4.1868 kJ
Energía específica
(Entalpía y energía
interna)
1 kJ/kg =0.42992 Btu/Lbm
1 J/kg = 1 m2
/s2
1 kCal/Kg =1.8 Btu/Lbm
1 kJ/kg =0.42992 Btu/Lbm
1 Btu/Lbm =2.326 kJ/kg
1 Btu/Lbm =25037 pie2
/s2
1 kJ/kg = 1000 m2
/s2
Rata de transferencia
de Energía
(Energía por unidad de
tiempo)
1 Watt =1 J/s =3.413 Btu/h
1 kWatt =1000 Watt=1.341 hp
1 hp=2545 Btu/h
1 hp= 42.42 Btu/min
1hp=550 Lbf.pie/s
1 hp = 0.7457 kWatt
1 Btu/hr=1.0551 kJ/hr
Calor específico 1 kJ/kg K=1 kJ/kg°C
1kJ/kg K=0.238846 Btu/Lbm R
1 Btu/Lbm°F =1 Kcal/Kg°C
1 Btu/Lbm R=1 Btu/Lbm°F
1 Btu/Lbm R=4.1868 kJ/Kg K
Temperatura
(Puntuales)
K = °C +273
R = °F + 460
°F =1.8°C +32
°C=(°F -32)/1.8
°R = 1.8°C + 492
Temperatura
(Diferencias)
1 °C =1.8 °F
1°C= 1 K
1 °F =1 R
1 K = 1.8 R
Volumen Específico 1 m3
/kg =1000 l/kg
1 m3
/kg = 1000 cm3
/gr
1 m3
/kg = 16.02 pie3
/ Lbm