History Back Conversion factors to SI units

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SI-Units

to convert from to multiply by
atmosphere (standard) Pa (Pascal) 1.013 250 E+05 
atmosphere (technical) Pa 9.806 650 E+04
bar Pa 1.000 000 E+05
barrel (petroleum, =42 gal) m3 1.589 873 E -01
calorie (mean) J 4.190 02 E+00
centi Poise (cP) Pa新 1.000 000 E -03
centi Stokes (cSt) m2/s 1.000 000 E -06
degree Celsius(1) K (Kelvin) TK = T+ 273.15
degree Fahrenheit K (Kelvin)

TK = (T+459.67)/1.8

degree Fahrenheit

T= (T - 32)/1.8

dyne N 1.000 000 E -05
foot (1 ft =1200/3937 m) m 3.048000 E -01
gravitate (g) m/s2 9.806 650 E+00
gallon (UK) m3 4.546 090 E -03
gallon (US) m3 3.785 412 E -03
horsepower (=550 ft損bf/s) W (watt) 7.456 999 E+02
inch m 2.540 000 E -02
kgf (=kilogram-force) N 9.806 650 E+00
lbf (=lbs, poundforce) N 4.448 222 E+00
pound (lb) kg 4.535 924 E -01
pound force (lbf, lbs) N 4.448 222 E 00
mile (Int. =5280 feet) m 1.609 344 E+03
mile (US nautical) m 1.852 000 E+03
mmHg (torr) Pa 0.133 322 E+03
pint (US liquid) m3 4.731 765 E -04
poise Pa新 1.000 000 E -01
psi (=pounds/square inch) Pa 6.894 757 E +03
rhe 1/(Pa新) 1.000 000 E+01
slug kg 1.459 390 E+01
stokes (St. kinematic visc.) m2/s 1.000 000 E -04
torr (=mmHg, 0慢) Pa 1.333 22 E +02
W (Watt) J/s 1.000 000 E+00
yard (yd) m 9.144 000 E -01
(1) The SI unit of Celsius temperature is 蚓, in base units K
example: temperature T=20 蚓, capacitance c= 50 J/(kg K)
Dynamic Viscosity
cp Pa新 1.0 E -03 
dyn.s/cm2 Pa.s 0.1 
gf.s/cm2 Pa.s 98.0665 
g /(cm新) Pa.s 0.1 
kgf新/cm2 Pa.s 9.80665 
kg/(m新) Pa.s
N新/m Pa.s
p,po Pa.s 0.1 
poiseuille Pa.s
lbf新/ft2 Pa.s 47.8803 
lbm/(ft新) Pa.s 1.48816 
lbm/(in新) Pa.s 17.858
reyns, reyn Pa.s 1.48816
slug/(ft新) Pa.s 47.8803
slug/(in新) Pa.s 574.563
Kinematic Viscosity
cSt m2/s 1 E -06
cm2/s m2/s 1 E -04
ft2/h m2/s 2.58064
ft2/s m2/s 9.2903
in2/h m2/s 1.79211
in2/s m2/s 6.4516
m2/h m2/s 2.77778
m2/s m2/s 1
St m2/s 1 E -04
 
Factor Prefix Symbol
101 deca da
102 hecto h
103 kilo k
106 mega M
109 giga G
1012 tera T
10-1 deci d
10-2 centi c
10-3 milli m
10-6 micro
10-9 nano n
10-12 pico p
     
 7 SI base Units (ISO 1000)
Lenght l, s meter [m]
Mass m kilogram [kg]
time t seconds [s]
electric current I amp鋨e [A]
temperature T kelvin [K]
amount of substance n mol [mol]
luminous intensity l candela [cd]
     
 SI derived units expressed in terms of base units
area square metre m2
volume cubic metre m3
speed velocity metre per second m/s
acceleration metre per second squared m/s2
wavenumber reciprocal metre m1
density, mass density kilogram per cubic metre kg/m3
specific volume cubic metre per kilogram m3/kg
current density ampere per square metre A/m2
magnetic field strength ampere per metre A/m
concentration (of amount of substance) mole per cubic metre mol/m3
luminance candela per square metre cd/m2
 SI derived units with special names and symbols
radian, steradian, hertz, newton, pascal, joule, watt, coulomb, volt, farad, ohm, siemens, weber, tesla, henry, degree Celsius, lumen, lux, becquerel, gray, sievert, katal
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