EQUIVALENCE TABLE FOR PRESSURE / VACUUM MEASUREMENTS
1 bar = 14.5 psi
1 Kg/cm2 = 14.223 psi
1 inch-25.4 mm
1 cubic foot = 28.32 liters
1 cubic meter = 35.31 cubic feet

1 micron = 1 millionth of a meter
1 millimeter = 1000 microns
1 micron = .001mm or 1 x 10 (-3)mm

MICRON TORR or MM Mercury MBAR Inches Mercury Absolute Inches Mercury Gauge ATM % VACUUM
760,000
760
1013
29.92
0
1
0
750,000
750
1000
29.5
0.42
0.987
1.3
735,600
735.6
981
28.9
1.02
0.968
1.9
700,000
700
934
27.6
2.32
0.921
7.9
600,000
600
800
23.6
6.32
0.789
21
500,000
500
667
19.7
10.22
0.658
34
400,000
400
533
15.7
14.22
0.526
47
380,000
380
507
15
14.92
0.5
50
300,00
300
400
11.8
18.12
0.395
61
200,000
200
267
7.85
22.07
0.264
74
100,000
100
133.3
3.94
25.98
0.132
87
90,000
90
120
3.54
26.38
0.118
88
80,000
80
106.8
3.15
26.77
0.105
89.5
70,000
70
93.4
2.76
27.16
0.0921
90.8
60,000
60
80
2.36
27.56
0.0789
92.1
51,700
51.7
68.8
2.03
27.89
0.068
93
50,000
50
66.7
1.97
27.95
0.0658
93.5
40,000
40
53.3
1.57
28.35
0.0526
94.8
30,000
30
40
1.18
28.74
0.0395
96.1
25,400
25.4
33.8
1
28.92
0.034
96.6
20,000
20
26.7
0.785
29.14
0.0264
97.4
10,000
10
13.33
0.394
29.53
0.0132
98.7
7,600
7.6
10.13
0.299
29.62
0.01
99
1000
1
1.33
0.03937
29.88
0.00132
99.9
750
0.75
1
0.0295
29.89
0.000987
99.9
100
0.1
0.133
0.00394
29.916
0.000132
99.99
10
0.01
0.0133
0.000394
29.9196
0.0000132
99.999
1
0.001
0.00133
0.0000394
29.92996
0.00000132
99.9999
0.1
0.0001
0.000133
0.00000394
29.91999
0.000000132
**
** Pressure reduction of 1 torr corresponds to 0.132% vacuum.


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