1Source: Green and Perry, Perry’s Chemical Engineers’ Handbook, 8th ed., Tables 1-4 and 1-7, 2008.
Density and Weight
1000.0 g = 1.0 kg
1.0 g/cm3 = 1000.0 kg/m3
1.0 lbm = 0.45359 kg
1.0 lbm/ft3 = 16.01846 kg/m3
Transport Properties: Diffusivity, Viscosity, and Mass Transfer Coefficient
1.0 ft2/s = 0.009290 m2/s
1.0 cm2/s = 0.0001 m2/s
1.0 Pa·s = 1.0 (N s)/m2 = 1.0 kg/(m.s)
1.0 cP = 0.001 Pa·s = 0.01 g/(cm.s)
1.0 lbm/(ft s) = 1.48816 Pa s
1.0 mol/[s m2(mol/L)] = 10.0 m/s
1.0 lbmol/[h ft2(lbmol/ft3)] = 0.00008467 m/s
Energy and Specific Heat
1.0 Btu = 1.055056 kJ
1.0 Btu = 0.0002931 kWh
1.0 cal = 4.184 J
1.0 kcal = 4.184 kJ
1.0 kJ/s = 1.0 kW
1.0 Btu/lbm = 2.3260 kJ/kg
1.0 Btu/(lbm °F) = 1.0 cal/(g °C) = 4184 kJ/(kg K)
1.0 kcal/(kg °C) = 4.184 kJ/(kg K)
Length and Volume
1.0 µm (1.0 micron) = 10–6 m
100.0 cm = 1.0 m
1.0 ft = 0.3048 m
1000.0 liters = 1.0 m3
1.0 ft3 = 7.481 US gal
1.0 US gal = 0.003785 m3
1.0 US gal = 3.785 L
Pressure
100,000 Pa = 100.0 kPa = 1.0 bar
101.3 kPa = 1.013 bar = 1.0 atm
760 mm Hg at 0°C (density 13.5951 g/cm3) = 760.0 torr = 1.0 atm
14.696 psi = 1.0 atm.
33.899 ft water at 3.94°C = 1.0 atm
Temperature
T in °C = (5/9) (T in °F – 32.0)
T in °C = T in K – 273.15
T in K = (5/9) (T in °R)
T in °F = T in °R – 459.7
Time
24.0 h = 1 day
60.0 min = 1.0 h
3600.0 s = 1.0 h
60.0 s = 1.0 min
R Gas constant, 8.314 J/(mol·K) = 1.9872 cal/(mol·K) = 1.9872 Btu/(lbmol °R) or 8.314 m3 Pa/(mol·K) or 0.008314 m3 kPa/(mol·K) or 82.057 cm3 atm/(mol·K) or 1.314 atm·ft3/(lbmol·K) or 0.7302 atm ft3/(lbmol °R)
22.4 liters of gas = 1.0 mol at STP (1.0 atm and 0°C)
359 ft3 of gas = 1.0 lbmol at STP
g Acceleration due to gravity at sea level, 9.8066 m2/s = 32.174 ft/s2
gc Conversion factor in English units, 32.2 ft·lbm/(lbf·s2)
kB Boltzmann’s constant, 1.380 J/(K·molecule)
N Avogadro’s number, 6.024 × 1023 molecules/mol