Engineering Unit conversion.pdf

UNITS CONVERSION T ABLES

Overview These conversion tables are provided for your reference.

Units Conversion Tables 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 Submulti ples of SI units Prefix

Symbol E P T G M k h da d

exa peta tera giga

Multiplying Factor 18

10 15 10 12 10 9 10 6 10 3 10 2 10

1 000 000 000 000 000 000 1 000 000 000 000 000 1 000 000 000 000 1 000 000 000 mega 1 000 000 kilo 1 000 hecto* 100 deca* 10 10 -1 deci* 10 0.1 -2 centi 10 c 0.01 -3 milli 10 m 0.001 -6 micro 10 u 0.000 001 -9 10 nano n 0.000 000 001 -12 pico 10 p 0.000 000 000 001 -15 femto f 10 0.000 000 000 000 001 -18 atto 10 a 0.000 000 000 000 000 001 * these prefixes are not normally used

Table 2: Length Units Millimeters Centimeters mm 1 10 1000 1000000 25.4 304.8 914.4 1609344

cm 0.1 1 100 100000 2.54 30.48 91.44 160934.4

Meters

Kilometers

Inches

Feet

Yards

Miles

m 0.001 0.01 1 1000 0.0254 0.3048 0.9144 1609.344

km 0.000001 0.00001 0.001 1 0.000025 0.000305 0.000914 1.609344

in 0.03937 0.393701 39.37008 39370.08 1 12 36 63360

ft 0.003281 0.032808 3.28084 3280.84 0.083333 1 3 5280

yd 0.001094 0.010936 1.093613 1093.613 0.027778 0.333333 1 1760

mi 6.21e-07 0.000006 0.000621 0.621371 0.000016 0.000189 0.000568 1

Table 3: Area Units Millimeter Centimeter square square 2

2

Meter square 2

Inch square 2

Foot square 2

mm

cm

m

in

ft

1 100 1000000 645.16 92903 836127

0.01 1 10000 6.4516 929.0304 8361.274

0.000001 0.0001 1 0.000645 0.092903 0.836127

0.00155 0.155 1550.003 1 144 1296

0.000011 0.001076 10.76391 0.006944 1 9

Yard square 2

yd

0.000001 0.00012 1.19599 0.000772 0.111111 1

Table 4: Volume Units Centimeter Meter cube cube 3

3

Liter

Inch cube in

cm

m 

ltr

1 1000000 1000 16.4 28317 3785 4545 158970

0.000001 1 0.001 0.000016 0.028317 0.003785 0.004545 0.15897

0.001 1000 1 0.016387 28.31685 3.79 4.55 159

Foot cube

US gallons

Imperial gallons

US barrel (oil)

ft

3

US gal

Imp. gal

US brl

0.000035 35 0.035 0.000579 1 0.13 0.16 6

0.000264 264 0.264201 0.004329 7.481333 1 1.20 42

0.00022 220 0.22 0.003605 6.229712 0.832701 1 35

0.000006 6.29 0.00629 0.000103 0.178127 0.02381 0.028593 1

3

0.061024 61024 61 1 1728 231 277 9701

Table 5: Mass Units Grams

Kilograms

Metric tonnes

Short ton

Long ton

Pounds

Ounces

g 1 1000 1000000 907200 1016000 453.6 28

kg 0.001 1 1000 907.2 1016 0.4536 0.02835

tonne 0.000001 0.001 1 0.9072 1.016 0.000454 0.000028

shton 0.000001 0.001102 1.102293 1 1.119929 0.0005 0.000031

Lton 9.84e-07 0.000984 0.984252 0.892913 1 0.000446 0.000028

lb 0.002205 2.204586 2204.586 2000 2239.859 1 0.0625

oz 0.035273 35.27337 35273.37 32000 35837.74 16 1

Table 6: Density Units Gram/milliliter Kilogram/meter cube

Pound/foot cube

3

3

Pound/inch cube 3

g/ml

kg/m

lb/ft

lb/in

1 0.001 0.01602 27.68

1000 1 16.02 27680

62.42197 0.062422 1 1727.84

0.036127 0.000036 0.000579 1

Table 7: Volumetric Liquid Flow Units Meter Foot Liter/second Liter/minute cube/hour cube/minute 3

3

Foot US cube/hour  gallons/minute 3

US barrels (oil)/day

L/sec

L/min

M /hr

ft /min

ft /hr

gal/min

US brl/d

1 0.016666 0.277778 0.4719 0.007867 0.06309 0.00184

60 1 16.6667 28.31513 0.472015 3.785551 0.110404

3.6 0.06 1 1.69884 0.02832 0.227124 0.006624

2.119093 0.035317 0.588637 1 0.01667 0.133694 0.003899

127.1197 2.118577 35.31102 60 1 8.019983 0.2339

15.85037 0.264162 4.40288 7.479791 0.124689 1 0.029165

543.4783 9.057609 150.9661 256.4674 4.275326 34.28804 1

Table 8: Volumetric Gas Flow Units Normal meter cube/hour Standard cubic feet/hour

Standard cubic feet/minute

Nm /hr

3

scfh

scfm

1 0.02832 1.699

35.31073 1 59.99294

0.588582 0.016669 1

Table 9: Mass Flow Uni ts Kilogram/hour Pound/hour kg/h 1 0.4536 3600 1000

Kilogram/second

Ton/hour

kg/s 0.000278 0.000126 1 0.277778

t/h 0.001 0.000454 3.6 1

lb/hour 2.204586 1 7936.508 2204.586

Table 10: High Pressure Units Bar

Pound/square inch

Kilopascal

Megapascal

Kilogram force/ centimeter square

bar

psi

kPa

MPa

1

14.50326

100

0.06895

1

0.01 10 0.9807 0.001333 1.013

Millimeter of mercury

 Atmospheres

kgf/cm

mm Hg

atm

0.1

1.01968

750.0188

0.987167

6.895

0.006895

0.070307

51.71379

0.068065

0.1450

1

0.001

0.01020

7.5002

0.00987

145.03 14.22335 0.019337 14.69181

1000 98.07 0.13333 101.3

1 0.09807 0.000133 0.1013

10.197 1 0.00136 1.032936

7500.2 735.5434 1 759.769

9.8717 0.968115 0.001316 1

2

Table 11: Low Pressure Units Meter of water mH2O

Foot of water ftH2O

Centimeter of mercury cmHg

Inches of mercury inHg

Inches of water inH2O

1

3.280696

7.356339

2.896043

39.36572

9806

0.304813

1

2.242311

0.882753

11.9992

2989

0.135937 0.345299 0.025403 0.000102

0.445969 1.13282 0.083339 0.000335

1 2.540135 0.186872 0.00075

0.39368 1 0.073568 0.000295

5.351265 13.59293 1 0.004014

1333 3386 249.1 1

Pascal Pa

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: Torqu e Units Newton meter Kilogram force meter Nm 1 9.80665 1.35582 0.112985

Foot pound

Inch pound

ftlb 0.737561 7.233003 1 0.083333

inlb 8.850732 86.79603 12 1

kgfm 0.101972 1 0.138255 0.011521

Table 14: Dynamic Visc osit y Units Centipoise*

Poise

Pound/foot·second

cp

poise

lb/(ft·s)

1 100 1488.16

0.01 1 14.8816

0.000672 0.067197 1

Table 15: Kinematic Viscosit y Units Centistoke*

Stoke

Foot square/second

cs

St

ft /s

2

1 0.01 0.000011 100 1 0.001076 92903 929.03 1 1000000 10000 10.76392 *note: centistokes x specific gravity = centipoise Table 16: Temperature Conversi on 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 November 2007

meter square/second 2

m /s 0.000001 0.0001 0.092903 1