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Units

ENGINEERING & TECHNOLOGY UNITS CONVERSION TABLES

Overview

Units Conversion Tables

Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16

Multiples and Submultiples of SI Units

Length Units , Area Units , Volume Units , Mass Units , Density Units , Volumetric Liquid Flow Units , Volumetric Gas Flow Units , Mass Flow Units , High Pressure Units , Low Pressure Units , Speed Units , Torque Units , Dynamic Viscosity Units , Kinematic Viscosity Units , Temperature Conversion Formulas

Table 1: Multiples and Submultiples of SI units
Prefix Symbol Multiplying Factor
exa E 1018 1 000 000 000 000 000 000
peta P 1 000 000 000 000 000
1015
tera T 1012 1 000 000 000 000
giga G 109 1 000 000 000
mega M 106 1 000 000
kilo k 103 1 000
hecto* h 102 100
deca* da 10 10
deci* d 10-1 0.1
centi c 10-2 0.01
milli m 0.001
10-3
micro u 10-6 0.000 001
nano n 10-9 0.000 000 001
pico p 10-12 0.000 000 000 001
femto f 10-15 0.000 000 000 000 001
atto a 10-18 0.000 000 000 000 000 001
* these prefixes are not normally used

Table 2: Length Units
Millimeters Centimeters Meters Kilometers Inches Feet Yards Miles
mm cm m km in ft yd mi
1 0.1 0.001 0.000001 0.03937 0.003281 0.001094 6.21e-07
10 1 0.01 0.00001 0.393701 0.032808 0.010936 0.000006
1000 100 1 0.001 39.37008 3.28084 1.093613 0.000621
1000000 100000 1000 1 39370.08 3280.84 1093.613 0.621371
25.4 2.54 0.0254 0.000025 1 0.083333 0.027778 0.000016
304.8 30.48 0.3048 0.000305 12 1 0.333333 0.000189
914.4 91.44 0.9144 0.000914 36 3 1 0.000568
1609344 160934.4 1609.344 1.609344 63360 5280 1760 1

Table 3: Area Units
Millimeter Centimeter Meter Inch Foot Yard
square square square square square square
mm2 cm2 m2 in2 ft2 yd2
1 0.01 0.000001 0.00155 0.000011 0.000001
100 1 0.0001 0.155 0.001076 0.00012
1000000 10000 1 1550.003 10.76391 1.19599
645.16 6.4516 0.000645 1 0.006944 0.000772
92903 929.0304 0.092903 144 1 0.111111
836127 8361.274 0.836127 1296 9 1

Table 4: Volume Units
Centimeter Meter Liter Inch Foot US Imperial US barrel (oil)
cube cube cube cube gallons gallons
cm3 m3 ltr in3 ft3 US gal Imp. gal US brl
1 0.000001 0.001 0.061024 0.000035 0.000264 0.00022 0.000006
1000000 1 1000 61024 35 264 220 6.29
1000 0.001 1 61 0.035 0.264201 0.22 0.00629
16.4 0.000016 0.016387 1 0.000579 0.004329 0.003605 0.000103
28317 0.028317 28.31685 1728 1 7.481333 6.229712 0.178127
3785 0.003785 3.79 231 0.13 1 0.832701 0.02381
4545 0.004545 4.55 277 0.16 1.20 1 0.028593
158970 0.15897 159 9701 6 42 35 1

Table 5: Mass Units

Grams Kilograms Metric tonnes Short ton Long ton Pounds Ounces
g kg tonne shton Lton lb oz
1 0.001 0.000001 0.000001 9.84e-07 0.002205 0.035273
1000 1 0.001 0.001102 0.000984 2.204586 35.27337
1000000 1000 1 1.102293 0.984252 2204.586 35273.37
907200 907.2 0.9072 1 0.892913 2000 32000
1016000 1016 1.016 1.119929 1 2239.859 35837.74
453.6 0.4536 0.000454 0.0005 0.000446 1 16
28 0.02835 0.000028 0.000031 0.000028 0.0625 1

Table 6: Density Units

Gram/milliliter Kilogram/meter cube Pound/foot cube Pound/inch cube
g/ml kg/m3 lb/ft3 lb/in3
1 1000 62.42197 0.036127
0.001 1 0.062422 0.000036
0.01602 16.02 1 0.000579
27.68 27680 1727.84 1

Table 7: Volumetric Liquid Flow Units
Liter/second Liter/minute Meter Foot Foot US US barrels
cube/hour cube/minute cube/hour gallons/minute (oil)/day
L/sec L/min M3/hr ft3/min ft3/hr gal/min US brl/d
1 60 3.6 2.119093 127.1197 15.85037 543.4783
0.016666 1 0.06 0.035317 2.118577 0.264162 9.057609
0.277778 16.6667 1 0.588637 35.31102 4.40288 150.9661
0.4719 28.31513 1.69884 1 60 7.479791 256.4674
0.007867 0.472015 0.02832 0.01667 1 0.124689 4.275326
0.06309 3.785551 0.227124 0.133694 8.019983 1 34.28804
0.00184 0.110404 0.006624 0.003899 0.2339 0.029165 1

Table 8: Volumetric Gas Flow Units

Normal meter cube/hour Standard cubic feet/hour Standard cubic feet/minute
Nm3/hr scfh scfm
1 35.31073 0.588582
0.02832 1 0.016669
1.699 59.99294 1

Table 9: Mass Flow Units
Kilogram/hour Pound/hour Kilogram/second Ton/hour
kg/h lb/hour kg/s t/h
1 2.204586 0.000278 0.001
0.4536 1 0.000126 0.000454
3600 7936.508 1 3.6
1000 2204.586 0.277778 1

Table 10: High Pressure Units
Kilogram
Bar Pound/square Kilopascal Megapascal force/ Millimeter Atmospheres
inch centimeter of mercury
square
bar psi kPa MPa kgf/cm2 mm Hg atm
1 14.50326 100 0.1 1.01968 750.0188 0.987167
0.06895 1 6.895 0.006895 0.070307 51.71379 0.068065
0.01 0.1450 1 0.001 0.01020 7.5002 0.00987
10 145.03 1000 1 10.197 7500.2 9.8717
0.9807 14.22335 98.07 0.09807 1 735.5434 0.968115
0.001333 0.019337 0.13333 0.000133 0.00136 1 0.001316
1.013 14.69181 101.3 0.1013 1.032936 759.769 1

Table 11: Low Pressure Units
Meter of Foot of Centimeter of Inches of Inches of Pascal
water water mercury mercury water
mH2O ftH2O cmHg inHg inH2O Pa
1 3.280696 7.356339 2.896043 39.36572 9806
0.304813 1 2.242311 0.882753 11.9992 2989
0.135937 0.445969 1 0.39368 5.351265 1333
0.345299 1.13282 2.540135 1 13.59293 3386
0.025403 0.083339 0.186872 0.073568 1 249.1
0.000102 0.000335 0.00075 0.000295 0.004014 1

Table 12: Speed Units

Meter/second Meter/minute Kilometer/hour Foot/second Foot/minute Miles/hour
m/s m/min km/h ft/s ft/min mi/h
1 59.988 3.599712 3.28084 196.8504 2.237136
0.01667 1 0.060007 0.054692 3.281496 0.037293
0.2778 16.66467 1 0.911417 54.68504 0.621477
0.3048 18.28434 1.097192 1 60 0.681879
0.00508 0.304739 0.018287 0.016667 1 0.011365
0.447 26.81464 1.609071 1.466535 87.99213 1

Table 13: Torque Units

Newton meter Kilogram force meter Foot pound Inch pound
Nm kgfm ftlb inlb
1 0.101972 0.737561 8.850732
9.80665 1 7.233003 86.79603
1.35582 0.138255 1 12
0.112985 0.011521 0.083333 1

Table 14: Dynamic Viscosity Units

Centipoise* Poise Pound/foot·second
cp poise lb/(ft·s)
1 0.01 0.000672
100 1 0.067197
1488.16 14.8816 1

Table 15: Kinematic Viscosity Units
Centistoke* Stoke Foot square/second meter
square/second
cs St ft2/s m2/s
1 0.01 0.000011 0.000001
100 1 0.001076 0.0001
92903 929.03 1 0.092903
1000000 10000 10.76392 1
*note: centistokes x specific gravity = centipoise
Table 16: Temperature Conversion Formulas
Degree Celsius (°C) (°F – 32) x 5/9
(K – 273.15)
Degree Fahrenheit (°F) (°C x 9/5) + 32
(1.8 x K) – 459.67
Kelvin (K) (°C + 273.15)
(°F + 459.67) ÷ 1.8
 

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