UNITS CONVERSION TABLES

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UNITS CONVERSION TABLES

Overview

These conversion tables are provided for your reference.

Units Conversion Tables

Table 1

Multiples and Submultiples of SI Units

Table 2

Length Units

Table 3

Area Units

Table 4

Volume Units

Table 5

Mass Units

Table 6

Density Units

Table 7

Volumetric Liquid Flow Units

Table 8

Volumetric Gas Flow Units

Table 9

Mass Flow Units

Table 10

High Pressure Units

Table 11

Low Pressure Units

Table 12

Speed Units

Table 13

Torque Units

Table 14

Dynamic Viscosity Units

Table 15

Kinematic Viscosity Units

Table 16

Temperature Conversion Formulas

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Table 1: Multiples and Submultiples of SI units

Prefix Symbol

Multiplying Factor

exa peta tera giga mega kilo hecto*

E

1018 1 000 000 000 000 000 000

P

1015

1 000 000 000 000 000

T

1012

G

109

1 000 000 000 000 1 000 000 000

M

106

1 000 000

k

103

1 000

h

102

100

deca*

da 10

deci*

d

10-1

centi

c

10-2

milli

m

10-3

micro

u

10-6

nano

n

10-9

pico

p

10-12

femto

f

10-15

atto

a

10-18

* these prefixes are not normally used

10 0.1 0.01 0.001 0.000 001 0.000 000 001 0.000 000 000 001 0.000 000 000 000 001 0.000 000 000 000 000 001

Table 2: Length Units

Millimeters Centimeters

mm

cm

1

0.1

10

1

1000 1000000

25.4

100 100000

2.54

304.8 914.4 1609344

30.48 91.44 160934.4

Meters Kilometers

m

km

0.001 0.01

0.000001 0.00001

1 1000 0.0254

0.001 1

0.000025

0.3048 0.000305 0.9144 0.000914 1609.344 1.609344

Inches

in

0.03937 0.393701 39.37008 39370.08

1 12 36 63360

Feet

ft

0.003281 0.032808 3.28084 3280.84 0.083333

1 3 5280

Yards

yd

0.001094 0.010936 1.093613 1093.613 0.027778 0.333333

1 1760

Miles

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

mm2

cm2

1 100 1000000 645.16 92903 836127

0.01 1

10000 6.4516 929.0304 8361.274

Meter square

m2

0.000001 0.0001 1

0.000645 0.092903 0.836127

Inch square

in2

0.00155 0.155

1550.003 1

144 1296

Foot square

ft2

0.000011 0.001076 10.76391 0.006944

1 9

Yard square

yd2

0.000001 0.00012 1.19599 0.000772 0.111111

1

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Table 4: Volume Units

Centimeter Meter

cube

cube

cm3

m3

1 1000000

1000 16.4 28317 3785 4545 158970

0.000001 1

0.001 0.000016 0.028317 0.003785 0.004545 0.15897

Liter

ltr

0.001 1000

1 0.016387 28.31685

3.79 4.55 159

Inch cube in3

0.061024 61024 61 1 1728 231 277 9701

Foot cube

ft3

0.000035 35

0.035 0.000579

1 0.13 0.16

6

US gallons US gal

0.000264 264

0.264201 0.004329 7.481333

1 1.20 42

Imperial gallons

Imp. gal

0.00022 220 0.22

0.003605 6.229712 0.832701

1 35

US barrel (oil)

US brl

0.000006 6.29

0.00629 0.000103 0.178127 0.02381 0.028593

1

Table 5: Mass Units

Grams

g

1 1000 1000000 907200 1016000 453.6 28

Kilograms

kg

0.001 1

1000 907.2 1016 0.4536 0.02835

Metric tonnes

tonne

0.000001 0.001 1 0.9072 1.016

0.000454 0.000028

Short ton

shton

0.000001 0.001102 1.102293

1 1.119929

0.0005 0.000031

Long ton

Lton

9.84e-07 0.000984 0.984252 0.892913

1 0.000446 0.000028

Pounds

lb

0.002205 2.204586 2204.586

2000 2239.859

1 0.0625

Ounces

oz

0.035273 35.27337 35273.37

32000 35837.74

16 1

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

g/ml

kg/m3

1 0.001 0.01602 27.68

1000 1

16.02 27680

Pound/foot cube lb/ft3

62.42197 0.062422

1 1727.84

Pound/inch cube lb/in3

0.036127 0.000036 0.000579

1

Table 7: Volumetric Liquid Flow Units

Liter/second

Liter/minute

Meter cube/hour

Foot cube/minute

L/sec

L/min

M3/hr

ft3/min

Foot cube/hour

ft3/hr

US gallons/minute

gal/min

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

US barrels (oil)/day

US brl/d

543.4783 9.057609 150.9661 256.4674 4.275326 34.28804

1

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Table 8: Volumetric Gas Flow Units

Normal meter cube/hour Standard cubic feet/hour

Nm3/hr

scfh

1 0.02832

1.699

35.31073 1

59.99294

Standard cubic feet/minute

scfm

0.588582 0.016669

1

Table 9: Mass Flow Units

Kilogram/hour

Pound/hour

kg/h

lb/hour

1

2.204586

0.4536 3600 1000

1 7936.508 2204.586

Kilogram/second

kg/s

0.000278 0.000126

1 0.277778

Ton/hour

t/h

0.001 0.000454

3.6 1

Table 10: High Pressure Units

Bar

Pound/square inch

Kilopascal

Megapascal

bar

1 0.06895

0.01 10 0.9807 0.001333 1.013

psi

14.50326 1

0.1450 145.03 14.22335 0.019337 14.69181

kPa

100 6.895

1 1000 98.07 0.13333 101.3

MPa

0.1 0.006895

0.001 1

0.09807 0.000133

0.1013

Kilogram force/

centimeter square kgf/cm2

1.01968

0.070307

0.01020

10.197

1 0.00136 1.032936

Millimeter of mercury

Atmospheres

mm Hg

750.0188 51.71379

7.5002 7500.2 735.5434

1 759.769

atm

0.987167 0.068065

0.00987 9.8717 0.968115 0.001316

1

Table 11: Low Pressure Units

Meter of water mH2O

1

0.304813 0.135937 0.345299 0.025403 0.000102

Foot of water ftH2O

3.280696

1 0.445969 1.13282 0.083339 0.000335

Centimeter of mercury cmHg

7.356339

2.242311 1

2.540135 0.186872 0.00075

Inches of mercury

inHg

2.896043

0.882753 0.39368

1 0.073568 0.000295

Inches of water inH2O

39.36572

11.9992 5.351265 13.59293

1 0.004014

Pascal

Pa 9806 2989 1333 3386 249.1

1

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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

Nm

kgfm

1

0.101972

9.80665 1.35582 0.112985

1 0.138255 0.011521

Foot pound

ftlb

0.737561 7.233003

1 0.083333

Inch pound

inlb

8.850732 86.79603

12 1

Table 14: Dynamic Viscosity Units

Centipoise*

Poise

cp

1 100 1488.16

poise

0.01 1

14.8816

Pound/foot?second

lb/(ft?s)

0.000672 0.067197

1

Table 15: Kinematic Viscosity Units

Centistoke*

Stoke

Foot square/second

cs

St

ft2/s

1

0.01

0.000011

100

1

0.001076

92903

929.03

1

1000000

10000

10.76392

*note: centistokes x specific gravity = centipoise

meter square/second

m2/s

0.000001 0.0001

0.092903 1

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

November 2007

International Society of Automation

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