Conversion Factors

Multiple

By

To obtain

Liters

0.22009

Gallons (U. K)

Liters

1.76072

Pints

Metres

3.2808

Feet

Metres

1.093614

Yards

Metric Tonnes

0.98421

Tons (U.K.)

Miles

1.609343

Kilometres

Millimetres

0.03937

Inches

Ounces

28.34953

Grams

Pints

0.56795

Litres

Pounds

0.4536

Kilograms

Sq. Centimetres

0.15500

Square Inches

Square Feet

0.09290

Square Metres

Square Inches

6.45163

Sq. Centimetres

Square Kilometres

0.386102

Square Miles

Square Metres

0.0002471

Acres

Square Metres

10.76387

Square Feet

Square Metres

1.19599

Square Yards

Square Miles

640.00

Acres

Square Miles

2.58999

Square Kilometres

Square Yards

0.83613

Square Metres

Tons (U.K.)

1.01605

Square Tonnes

Tons (U.K.)

1016.0470

Kilograms

Yards

0.914399

Metres

Acres

0.404686

Hectares

Acres

4047.00

Square Metres

Acres

0.001562

Square Miles

Centimetres

0.393701

Inches

Cubic Centimetres

0.061024

Cubic Inches

Cubic Feet

6.228

Gallons

Cubic Feet

0.02832

Cubic Metres

Cubic Inches

16.3871

Cubic Centimetres

Cubic Metres

35.31445

Cubic Feet

Cubic Metres

1.30794

Cubic Yards

Cubic Yards

0.76456

Cubic Metres

Feet

0.3048

Metres

Gallons

0.1606

Cubic Feet

Gallons (U.K.)

4.536

Litres

Grams

0.03527

Ounces

Hectares

2.47105

Acres

Horsepower

0.7457

Kilowatts

Inches

2.539998

Centimetres

Inches

25.39998

Millimetres

Kilograms

2.204620

Pounds

Kilograms

0.0009842

Tons (U.K.)

Kilometres

0.621372

Miles

Kilowatts

1.341

Horsepower

Conversion Table

UNITS OF PRESSURE

Units x Factor

To
obtain

Atm

kg/cm²

Psi

mmHg

Bars

In/H₂O

M/H ₂O

1 atm = 760 mm Hg

1.0

1.033

14.70

760

1.013

407.1

10.34

1 kg/cm²

0.9678

1.0

14.22

735.6

0.9807

394.1

10.01

1 psi (pounds per square inch)

0.06805

0.07031

1.0

51.71

0.06895

27.70

0.7037

1 torr = 1/760
atm = 1 mm Hg

1.360
x 10^-3

1.316
x 10^-3

19.34
x 10^-3

1.0

1.333
x 10^-3

0.5357

0.0136

1 bar = 10 6 dyne/cm²

0.9869

1.020

14.50

750.1

1.0

401.8

10.21

In/H 2 0 (Inches of Water at 15°C)

2.456
x 10^-3

2.538
x 10^-3

0.0361

1.867

2.489
x 10^-3

1.0

0.0254

M/H 2 0 (Metres of water at 15°C)

0.0967

0.0999

1.421

73.49

0.098

39.37

1.0

Conversion Table

UNITS OF VACUUM

Measurement

kg/cm'

BAR

in WG

in Hg

PSI

mm Hg TORR

mm WG

1 kg/cm³

1.0

0.981

393.7

28.94

14.22

736

10000

1 BAR

1.02

1.0

401.6

29.53

14.5

750

10210

1 in WG

0.00254

0.00249

1.0

0.0736

0.0361

1.87

25.4

1 in Hg

0.0346

0.0339

13.6

1.0

0.491

25.4

345.4

1 PSI

0.0703

0.0689

27.68

2.035

1.0

51.7

703.1

1 mm Hg TORR

0.0014

0.0013

0.54

0.04

0.02

1.0

13.6

1 mmWG

0.0001

0.0001

0.04

0.003

0.0015

0.07

1.0

Conversion Table

UNITS OF FLOW

Units x Factor

To
obtain

gpm

1/min.

1/hr.

Cfh

cfm

m³/min

m³/hr.

gpm (gallons per minute-U.S.A. gals)

1.0

3.785

227.1

8.021

0.1337

3.785 x 10³

0.2271

1/min. (Iitres per minute)

0.264

1.0

60.0

2.119

0.035

1 x 10³

60 x 10³

Dm³/sec.

15.84

60

3600

127.14

2.10

60 x 10³

3.6

1/hr. (litres per hour)

0.0044

16.66
x 10^-3

1.0

0.035

05885 x 10^-3

16.67
x 10^-3

1 x 10^-3

cfh (cubic feet per hour)

0.1247

0.472

28.32

1.0

16.67
x 10^-3

0.472
x 10^-3

28.32
x 10^-3

cfm (cubic feet per minute)

7.481

28.32

1699.

60

1.0

28.32
x 10^-3

1.6992

m³/min. (cubic metre per minute)

264.2

1000.

60 x 10³

2119.

35.31

1.0

60.

M³/hr. (Cubic metre per hour)

4.403

16.67

1000.

35.31

0.588

16.67
x 10^-3

1.0

 

bar

kPa
KN/m²
Kilopascal

kg/cm²
kilogrammes
per square
Centimetre

cm Hg
centimeters
head of
mercury
(std)

atm
standard
atmosphere

in Hg
inches
head of
mercury
(std)

ft water
feet
head of
water
(std)

lb/in²
pounds
per
square
inch

bar

1.0

100

1.0197

75.006

0.98692

29.530

33.455

14.504

kpa

0.01

1.0

0.010197

0.75006

0.009869

0.2953

0.33455

0.14504

kg/cm²

0.98067

98.067

1.0

73.556

0.96784

28.959

32.808

14.223

cm Hg

0.013332

1.3332

0.013595

1.0

0.013158

0.39370

0.44603

0.19337

atm

1.0133

101.33

1.0332

76.000

1.0

29.921

33.899

14.696

in Hg

0.033864

3.3864

0.034532

2.5400

0.033421

1.0

1.1329

0.49115

ft water

0.029891

2.9891

0.030480

2.2420

0.029500

0.88267

1.0

0.43353

lb / in²

0.068948

6.8948

0.070307

5.1715

0.068046

2.0360

2.3067

1.0