Technical

Useful Conversion Data

LENGTH

millimetre mm metre m inch in foot ft yard yd
   1100025.4

304.8

914.4

0.00110.0254

0.3048

0.9144

0.039439.37011

12

36

0.00333.28080.0833

1

3

0.00111.09360.0278

0.3333

1


VOLUME

cubic metre m3 cubic centimetre cm3 litrel cubic inchin3 cubic footft3 UK gallonUK gal US gallon US gal
10.000 0010.001

0.000 016

0.028 3

0.004 5

0.003 8

1 000 00011 000.028

16.3871

28 316.8

4 546.09

3 785.41

999.9720.000 999 71

0.016 4

28.316 1

4.546

3.785 3

61 023.70.061061.0255

1

1 728

277.419

231

35.314 70.000 035 30.035 3

0.000 58

1

0.160 5

0.133 7

219.9690.000 220.22

0.003 6

6.228 8

1

0.832 7

264.1720.000 260.264.2

0.004 3

7.480 5

1.201

1

 

VELOCITY

metre per second m/s foot per second ft/s foot per minute ft/m kilometre per hour km/h mile per hour mile/h
10.304818.288

0.2778

0.4470

3.2808160

0.9113

1.4667

0.05470.01671

0.0152

0.0245

3.61.097365.8368

1

1.6093

2.23690.681840.9091

0.6214

1

 

MASS

kilogram Kg pound lb hundredweight cwt ton net UK ton US short ton  sh ton
   10.453650.8023

1000

1016.05

907.185

   2.20461112

2204.62

2240

2000

0.01970.00891

19.6841

20

17.8571

0.0010.000 4540.050 8

1

1.016 1

0.907 2

0.000 980.000 4460.05

0.984 2

1

0.892 9

0.00110.00050.056

1.1023

1.12

1


MASS RATE OF FLOW

kilogram per second kg/s kilogram per hour kg/h pound per hour lb/h ton per hourUK ton/hr tonne per day t/d
10.000 2780.000 126

0.282 2

0.011 6

360010.4536

1016.05

41.6667

7936.642.20461

2240

91.8592

3.543 140.000 9840.000 446

1

0.041 01

86.40.024.0109

24.3852

1


VOLUMETRIC RATE OF FLOW

litreper secondl/s litre per minute l/min cubic metre per hour m3/h cubic foot per hour ft3/h cubic foot per minute ft3/m UK gallon per minute UK gal/min US gallon per minute US gal/min US barrel per dayUS barrel/d
10.01670.2778

0.0079

0.4719

0.0758

0.0631

0.0018

60116.6666

0.4719

28.316

4.546

3.7853

0.1104

3.60010.06001

0.0283

1.6990

0.2728

0.2271

0.0066

127.1362.118935.3147

1

60

9.6326

8.0208

0.2339

2.11890.35320.5886

0.1067

1

0.1605

0.1337

0.0039

13.19860.223.6662

0.1038

6.2288

1

0.8327

0.0243

15.85080.26424.4029

0.1247

7.4805

1.201

1

0.0292

543.4569.0576150.956

4.2746

256.475

41.1754

34.2857

1


STANDARD GAS CONDITIONS AND MOLAR VOLUMES

NORMAL (eg nft3) – European and scientific work = 0°C and 1.0133 barMolar Volume 22.412m3/kgmol

STANDARD (eg std ft3) – British Gas Industry   = 15.55°C and 1.016 barMolar Volume 24.112m3/kgmol

STANDARD (scf) – USA                           = 15.55°C and 1.0133 barMolar Volume 23.681m3/kgmol


PRESSURE AND LIQUID HEAD

 

bar *1

kilogram force per square centimetre kgf/cm2 *2 pound force per square inchlbf/in2 *3  


atm *4

foot of water 

ft H2O *5

inch of water 

in H2O

metre of water 

m H2O

centimetre of mercury 

cm Hg

inch of mercury 

in Hg

millimetre of mercury 

mm Hg *6

10.98070.0689

1.0133

0.0299

0.0025

0.0981

0.0133

0.0339

0.0013

1.019710.0703

1.0332

0.0305

0.0025

0.1000

0.0136

0.0345

0.0014

14.503814.22331

14.6959

0.4335

0.0361

1.422

0.1934

0.4911

0.0193

0.98690.98780.0609

1

0.0295

0.0025

0.0968

0.0132

0.0334

0.0013

33.455332.80842.3067

33.889

1

0.0833

3.2808

0.4461

1.133

0.446

401.463393.70127.68

406.782

12

1

39.3701

5.3524

13.5951

0.5352

10.1972100.7031

10.3323

0.3048

0.0254

1

0.136

0.3453

0.0136

75.006273.5565.1715

76.0

2.242

0.1868

7.3556

1

2.54

0.1

29.53028.9592.036

29.9213

0.8827

0.0734

2.896

0.3937

1

0.0394

750.062735.55951.715

760

22.4198

1.8683

73.356

10

25.4           1


*1 1 bar = 105N/m2

*2 Technical (metric) atmosphere (at)

*3 Often denoted non-technically as psi

*4 International standard atmosphere

*5 At density 1g/cm3*6 Also known as torr


PRESSURE STANDARDS

International standard atmosphere (1 atm)= 1.0332 bar= 1.0032 kgf/cm2= 14.6959 lbf/in2

Metric atmosphere                 (1 at)= 0.9807 bar= 1 kgf/cm2= 14.2233 lbf/in2

ata= at absolute

atu= at gauge


STANDARD CONDITIONS – stp or NTP= 1.0133 bar at 0°C = 14.6959 lbf/in2 at 0°C

DENSITY

gram per millilitreg/ml kilogram per cubic metrekg/m3 pound per cubic footlb/ft3 pound per cubic inchlb/in3
10.0010.016

27.6807

1 000116.02

27 679.9

62.4280.06241

1728

0.036 10.000 0360.000 58

1


HEAT FLOW RATE

wattsW calorie per secondcal/s kilocalorie per hourkcal/h British Thermal unit per hourBtu/h
14.18681.163

0.2931

0.238810.2778

0.07

0.85983.61

0.252

3.412114.2863.9683

1


POWER

wattW kilogram force metre per secondkgf m/s metric horse power foot pound force per secondft lbf/s horse powerhp
19.8067735.499

1.3558

745.70

0.102175

0.1383

76.0402

0.001 360.013 331

0.001 84

0.013 9

0.73767.2330542.476

1

550.0

0.001 340.013 150.986 32

0.001 82

1


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