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Pressure Conversion Tables

Technical Data Section Reference

PRESSURE CONVERSION TABLE TO HELP IN APPLYING
  OMEGA® PRESSURE TRANSDUCERS

Multiply by the conversion factors to obtain the new units

Atmos

Bars

Dynes/cm2

In of Hg (0°C)

In of H2O (4°C)

K grams/
meter2

Atmos

1

9.86923x 10-1

9.86923 x 10-7

3.34207 x 10-2

2.458 x 10-3

9.678 x 10-5

Bars

1.01325

1

1 x 10-6

3.3864 x 10-2

2.491 x 10-3

9.8067 x 10-5

Dynes/cm2

1.01325 x 106

106

1

3.386 x 104

2.491 x 103

98.067

In of Hg (0°C)

29.9213

29.53

2.953 x 10-5

1

7.355 x 10-2

2.896 x 10-3

In of H2O (4°C)

406.8

401.48

4.0148 x 10-4

13.60

1

3.937 x 10-2

K grams/meter2

1.033227 x 104

1.0197 x 104

1.0197 x 10-2

345.3

25.40

1

Lb/In2 psi

14.695595

14.504

1.4504 x 10-5

0.4912

3.6126 x 10-2

1.423 x 10-3

Lb/ft2

2116.22

2088.5

2.0885 x 10-3

70.726

5.202

0.2048

mm of Hg torr

760

750.06

7.5006 x 10-4

25.400

1.868

7.3558 x 10-2

Microns

760 x 103

750.06 x 103

0.75006

2.54 x 104

1.868 x 103

73.558

Pascals

1.01325 x 105

1 x 105

10-1

3.386 x 103

2.491 x 102

9.8067

PRESSURE CONVERSION TABLE TO HELP IN APPLYING
  OMEGA® PRESSURE TRANSDUCERS

Multiply by the conversion factors to obtain the new units

Lb/In2 psi

Lb/ft2

mm of Hg torr

Microns

Pascals

Atmos

0.068046

4.7254 x 10-4

1.316 x 10-3

1.316 x 10-6

9.869 x 10-6

Bars

6.8948 x 10-2

4.788 x 10-4

1.333 x 10-3

1.333 x 10-6

10-5

Dynes/cm2

6.8948 x 104

478.8

1.333 x 103

1.333

10

In of Hg (0°C)

2.036

0.014139

3.937 x 10-2

3.937 x 10-5

2.953 x 10-4

In of H2O (4°C)

27.68

0.1922

0.5354

5.354 x 10-4

4.014 x 10-3

K grams/meter2

7.0306 x102

4.882

13.59

13.59 x 10-3

1.019 x 10-1

Lb/In2 psi

1

6.9444 x 10-3

1.934 x 10-2

1.934 x 10-5

1.450 x 10-4

Lb/ft2

144.0

1

2.7844

2.7844 x 10-3

2.089 x 10-2

mm of Hg torr

51.715

0.35913

1

10-3

7.502 x 10-3

Microns

51.715 x 103

359.1

1 x 103

1

7.502

Pascals

6.8948 x 103

4.788 x 101

1.333 x 102

1.333 x 10-1

1

 

TEMPERATURE CONVERSION CHART

°C

°F

°C

°F

°C

°F

-200

-328

0

32

140

284

-180

292

5

41

160

320

-160

-256

10

50

180

356

-140

-220

15

59

200

392

-120

-184

20

68

212

414

-100

-148

25

77

220

428

-90

-130

30

86

250

482

-80

-112

40

104

300

572

-70

-94

50

122

350

662

-60

-76

60

140

400

752

-50

-58

70

158

450

842

-40

-40

80

176

500

932

-30

-22

90

194

600

1112

-20

-4

100

212

700

1292

-10

+14

120

248

800

1472

   

   

   

   

900

1652

   

   

   

   

1000

1832

METRIC

English

Metric

mm = 0.03937 in.

in.= 25.4 mm

cm = 0.3937 in.

in. = 2.54 cm

m = 39.37 in.

in. = 2.54 x 10-2 m

 

TEMPERATURE

Celcius

Fahrenheit

°C = (F-32) / 1.8

°F = 1.8C + 32

PRESSURE VS. ALTITUDE

Altitude
(Feet)

Pressure

in of Hg

mm of Hg

psia

-1,000

31.02

787.9

15.25

-500

30.47

773.8

14.94

0

29.921

760.0

14.70

500

29.38

746.4

14.43

1,000

28.86

732.9

14.18

1,500

28.33

719.7

13.90

2,000

27.82

706.6

13.67

2,500

27.31

693.8

13.41

3,000

26.81

681.1

13.19

3,500

26.32

668.6

12.92

4,000

25.84

656.3

12.70

4,500

25.36

644.2

12.45

5,000

24.89

632.3

12.23

10,000

20.58

522.6

10.10

15,000

16.88

428.8

8.28

20,000

13.75

349.1

6.75

30,000

8.88

225.6

4.36

40,000

5.54

140.7

2.72

50,000

3.426

87.30

1.689

60,000

2.132

54.15

1.048

70,000

1.322

33.59

0.649

80,000

0.820

20.83

0.403

 

SI: The Modernized Metric System

SI - the International System of Units - establishes the pascal (Pa) as the standard unit for Pressure or Stress in the modernized Metric System adopted by the American National Standards Institute.

To Convert to pascals

Multiply by

atmosphere

1.013 x 105

bar

1.000 x 105

dyne/centimeter2

1.000 x 10-1

inch of mercury (0°C)

3.386 x 103

inch of water (4°C)

2.491 x 102

kilogram/meter2

9.807

pound/inch2 (psi)

6.894 x 103

pound/foot2

4.788 x 101

torr (mm of mercury 0°C)

1.333 x 102

 

PRESSURE CONVERSION CHART

psi

in. 0f H2O

in. of Hg

mm of H2O

mm of Hg

bar

mbar

.01

.2768

.0204

7.031

.5171

.0007

.6895

.02

.5536

.0407

14.06

1.034

.0014

1.379

.03

.8304

.0611

21.09

1.551

.0021

2.068

.04

1.107

.0814

28.12

2.068

.0028

2.758

.05

1.384

.1018

35.15

2.586

.0034

3.447

.06

1.661

.1222

42.18

3.103

.0041

4.137

.07

1.938

.1425

49.22

3.620

.0048

4.826

.08

2.214

.1629

56.25

4.137

.0055

5.516

.09

2.491

.1832

63.28

4.654

.0062

6.205

.10

2.768

.2036

70.31

5.171

.0069

6.895

.20

5.536

.4072

140.6

10.34

.0138

13.79

.30

8.304

.6108

210.9

15.51

.0207

20.68

.40

11.07

.8144

281.2

20.68

.0276

27.58

.50

13.84

1.018

351.5

25.86

.0345

34.47

.60

16.61

1.222

421.8

31.03

.0414

41.37

.70

19.38

1.425

492.2

36.20

.0483

48.26

.80

22.14

1.629

562.5

41.37

.0552

55.16

.90

24.91

1.832

632.8

46.54

.0620

62.05

1.0

27.68

2.036

703.1

51.71

.0690

68.95

2.0

55.36

4.072

1406

103.4

.1379

137.9

3.0

83.04

6.108

2109

155.1

.2068

206.8

4.0

110.7

8.144

2812

206.8

.2758

275.8

5.0

138.4

10.18

3515

258.6

.3447

344.7

6.0

166.1

12.22

4218

310.3

.4137

413.7

7.0

193.8

14.25

4922

362.0

.4826

482.6

8.0

221.4

16.29

5625

413.7

.5516

551.6

9.0

249.1

18.32

6328

465.4

.6205

620.5

10.0

276.8

20.36

7031

517.1

.6895

689.5

14.7

406.9

29.93

10340

760.2

1.014

1014

15.0

415.2

30.54

10550

775.7

1.034

1034

20.0

553.8

40.72

14060

1034

1.379

1379

25.0

692.0

50.90

17580

1293

1.724

1724

30.0

830.4

61.08

21090

1551

2.068

2068

40.0

1107

81.44

28120

2068

2.758

2758

50.0

1384

101.8

35150

2586

3.447

3447

100.0

2768

203.6

70310

5171

6.895

6895

150.0

4152

305.4

105500

7757

10.34

10340

200.0

5538

407.2

140600

10340

13.79

13790

250.0

6920

509.0

175800

12930

17.24

17240

 

PSI CONVERSION FACTORS
 

To PSI

From PSI

psi = in. of H2O x (3.6127 x 10-2)

in. of H2O = psi x 27.68

psi = in. of Hg x (0.49118)

in. of Hg = psi x 2.036

psi = mm of H2 x (1.4223 x 10-3)

mm of H2O = psi x 703.1

psi = mm of Hg x (1.9339 x 10-2)

mm of Hg = psi x 51.71

psi = cm of H2O x (14.223 x 6-3)

cm of H2O = psi x 70.3

psi = kg/cm2 x (14.223)

kg/cm2 = psi x .0703

psi = bar x (14.503)

bar = psi x .0689

psi = mbar x (1.4503 x 10-2)

mbar = psi x 68.95

psi = Pa x (1.4503 x 10-4)

Pa = psi x 6895

psi = kPa x (1.4503 x 10-1)

kPa = psi x 6.895

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