Guide for the Use of the International System of Units (SI)

Guide for the Use of the International System of Units (SI) 
 
51 
To convert from
 to
Multiply by 
 
inch per second squared (in / s
2
) .......................... meter per second squared (m / s
2
) ................. 2.54 E−02 
inch to the fourth power (in
4
)
16
............................ meter to the fourth power (m
4
) ............. 4.162 314 E−07 
kayser (K) ............................................................ reciprocal meter (m
−1
) ..................................... 1.0 E+02 
kelvin (K) ............................................................. degree Celsius (ºC) ...................... t / ºC = T / K − 273.15 
kilocalorie
IT
(kcal
IT
) ............................................. joule (J) ..................................................... 4.1868 E+03 
kilocalorie
th
(kcal
th
) .............................................. joule (J) ....................................................... 4.184 E+03 
kilocalorie (mean) (kcal) ..................................... joule (J) .................................................. 4.190 02 E+03 
kilocalorie
th
per minute (kcal
th
/ min) .................. watt (W ................................................. 6.973 333 E+01 
kilocalorie
th
per second (kcal
th
/ s) ....................... watt (W ........................................................ 4.184 E+03 
kilogram-force (kgf) ............................................ newton (N) ............................................. 9.806 65 E+00 
kilogram-force meter (kgf · m) ............................ newton meter (N · m) ............................. 9.806 65 E+00 
kilogram-force per square centimeter 
(kgf / cm
2
) ..................................................... pascal (Pa) .............................................. 9.806 65 E+04 
kilogram-force per square centimeter 
(kgf / cm
2
) ..................................................... kilopascal (kPa)....................................... 9.806 65 E+01 
kilogram-force per square meter (kgf / m
2
) ......... pascal (Pa) .............................................. 9.806 65 E+00 
kilogram-force per square millimeter 
(kgf / mm
2
) ................................................... pascal (Pa) .............................................. 9.806 65 E+06 
kilogram-force per square millimeter 
(kgf / mm
2
) ................................................... megapascal (MPa) .................................. 9.806 65 E+00 
kilogram-force second squared per meter 
(kgf 
· 
s
2
/ m) .................................................. kilogram (kg) ......................................... 9.806 65 E+00 
kilometer per hour (km / h) ................................. meter per second (m / s) ....................... 2.777 778 E−01 
kilopond (kilogram-force) (kp) ............................ newton (N) ............................................. 9.806 65 E+00 
kilowatt hour (kW · h) ......................................... joule (J) ........................................................... 3.6 E+06 
kilowatt hour (kW · h) ......................................... megajoule (MJ) ............................................... 3.6 E+00 
kip (1 kip =1 000 lbf) .......................................... newton (N) ........................................... 4.448 222 E+03 
kip (1 kip = 1000 lbf) .......................................... kilonewton (kN) ................................... 4.448 222 E+00 
kip per square inch (ksi) (kip / in
2
) ...................... pascal (Pa) ............................................ 6.894 757 E+06 
kip per square inch (ksi) (kip / in
2
) ...................... kilopascal (kPa) .................................... 6.894 757 E+03 
knot (nautical mile per hour) ............................... meter per second (m / s) ....................... 5.144 444 E−01 
lambert
17
.............................................................. candela per square meter (cd / m
2
) ...... 3.183 099 E+03 
langley (calth / cm
2
) ............................................. joule per square meter (J / m
2
) ................... 4.184 E+04 
light year (l.y.)
18
.................................................. meter (m) .............................................. 9.460 73 E+15 
liter (L)
19
 .............................................................. cubic meter (m
3
) ............................................. 1.0 E−03 
lumen per square foot (lm / ft
2
) ........................... lux (lx) ................................................. 1.076 391 E+01 
maxwell (Mx) ...................................................... weber (Wb) .................................................... 1.0 E−08 
mho ...................................................................... siemens (S) ..................................................... 1.0 E+00 
microinch ............................................................. meter (m) ...................................................... 2.54 E−08 
microinch ............................................................. micrometer (μm) ........................................... 2.54 E−02 
micron (μ) ............................................................ meter (m) ........................................................ 1.0 E−06 
micron (μ) ............................................................ micrometer (μm) ............................................ 1.0 E+00 
mil (0.001 in) ....................................................... meter (m) ...................................................... 2.54 E−05 
mil (0.001 in) ....................................................... millimeter (mm) ............................................ 2.54 E−02 
17
The exact conversion factor is 10
4
/π. 
18
This conversion factor is based on 1 d = 86 400 s; and 1 Julian century = 36 525 d. (See The Astronomical Almanac for the Year 
1995, page K6, U.S. Government Printing Office, Washington, DC, 1994). 
19
In 1964 the General Conference on Weights and Measures reestablished the name “liter” as a special name for the cubic decimeter. 
Between 1901 and 1964 the liter was slightly larger (1.000 028 dm
3
); when one uses high-accuracy volume data of that time, this fact 
must be kept in mind. 

---