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Conversion Chart

These are tools to help you do everyday calculations for vacuum pressure, volume, capacity, weight, length, efficiency and temperature. To find the required charts click here.
mbar (hPa)
bar
Pa (N/m2)
KPa
atm
Kgf cm -2(at)
mm H2O
Torr (mm Hg)
micron
in Hg
in H2O
lbfin-2 (psi)
1 mbar
1
1×10-3
102
0.1
9.869×10-4
1.02×10-3
10.197
0.75
750
2.953×10-2
0.402
1.45×10-2
1 bar
103
1
1×105
100
0.987
1.02
1.02×104
7.5×102
7.5×105
29.53
4.015×102
14.5
1 Pa (N/m2)
0.01
1×10-5
1
0.001
9.869×10-6
1.02×10-5
0.102
7.5×10-3
7.5
2.953×10-4
4.015×10-3
1.45×10-4
1 KPa
10
0.01
103
1
9.869×10-3
1.02×10-2
1.02×102
7.5
7.5×103
0.295
4.015
0.145
1 atm
1.013×103
1.013
1.013×105
1.013×102
1
1.033
1.033×104
7.6×102
7.6×105
29.92
4.068×102
14.7
1 Kgfcm-2(at)
9.807×102
0.981
9.807×104
98.07
0.968
1
104
7.356×102
7.356×105
28.96
3.937 x 102
14.22
1 mm H2O
9.807×10-2
9.807×10-5
9.807
9.807×10-3
9.677×10-5
10-4
1
7.354×10-2
73.54
2.896×10-3
3.394×10-2
1.42×10-3
1 Torr (mm Hg)
1.333
1.333×10-3
1.333×102
1.333×10-1
1.316×10-3
1.36×10-3
13.59
1
103
3.937×10-2
0.535
1.934×10-2
1 micron
1.333×10-3
1.333×10-6
1.333×10-1
1.333×10-4
1.316×10-6
1.36×10-6
1.359×10-2
10-3
1
3.937×10-5
5.35×10-4
1.934×10-5
1 in Hg
33.86
3.386×10-2
3.386×103
3.386
3.342×10-2
3.453×10-2
3.45×102
25.4
2.54×104
1
13.6
0.491
1 in H2O
2.491
2.491×10-3
2.491×102
0.249
2.458×10-3
2.54 x 10-3
25.4
1.868
1.868X103
7.356×10-2
1
3.613×10-2
1 lbfin-2 (psi)
68.95
6.895×10-2
6.895×103
6.895
6.805×10-2
7.03×10-2
7.03×102
51.71
5.171×104
2.036
27.68
1

Vacuum Conversion : Absolute pressure p (mbar abs.) can be converted to & from pressure difference DP (inches Hg) based on atmospheric pressure of 1013 mbar abs. (= 760 Torr = 29.92 inches Hg abs.) using the followng formula : 29.92 – 2.953X10-2 Xp(mbar abs) = Dp (inches Hg) ; 1013-33.86 X Dp (inches Hg) = p (mbar abs.)

 
m3/h
m3/min
m3/s
l/min
cfm (ft3min-1)
gal/min
1 m3/h
1
1.667×10-2
2.778×10-4
16.67
0.588
4.403
1 m3/min
60
1
1.667×10-2
103
35.28
2.642×102
1 m3/s
3600
60
1
6×104
2.117×103
1.585×104
1 l/min
6×10-2
10-3
1.667×10-5
1
3.528×10-2
0.264
1 cfm(ft3min-1)
1.699
2.832×10-2
4.72×10-4
28.32
1
7.481
1 gal/min
0.227
0.378
6.306×10-5
3.784
0.133
1
 
KW
W(J/S)
PS
Hp
Kcal/hr
Btu/hr
1 KW
1
103
1.36
1.341
860
3.412×103
1 W(J/S)
10-3
1
1.36×10-3
1.341×10-3
0.860
3.412
1 PS
0.736
736
1
0.986
6.329×102
2.509×103
1 hp
0.746
7.46
1.014
1
6.413×102
2.545×103
1 Kcal/hr
1.163×10-3
1.163
1.58×10-3
1.559×10-3
1
3.968
1 Btu/hr
2.931×10-4
0.2931
3.985×10-4
3.93×10-4
0.252
1
 
 
mm
cm
m
in
ft
yd
1 mm
1
0.1
10-3
3.94×10-2
3.28×10-3
1.093×10-3
1 cm
10
1
10-2
0.394
3.28×10-2
1.093×10-2
1 m
103
102
1
39.4
3.28
1.093
1 in
25.4
2.54
2.54×10-2
1
8.33×10-2
2.78×10-2
1 ft
3.048×102
30.48
0.305
12
1
0.333
1 yd
9.144
0.914×102
0.914
36
3
1
 
ml(cm3)
l(dm3)
in3
ft3
imp.gal
U.S.gal
1 ml(cm3)
1
10-3
0.061
3.53×10-5
2.20×10-4
2.64×10-4
1 ldm3
103
1
0.610×102
3.53×10-2
0.220
0.264
1 in3
16.39
1.639×10-2
1
5.79×10-4
3.606×10-3
4.327×10-3
1 ft3
2.83×104
28.3
1.728×103
1
6.25
7.46
1 lmp.gal
4.55×103
4.55
2.773×102
0.160
1
1.20
1 U.S.gal
3.785×103
3.785
2.311×102
0.134
0.833
1
 
g
Kg
oz
lb
Brit.ton
U.S.ton
1 g
1
10-3
3.53×10-2
2.205×10-3
0.984×10-6
1.103×10-6
1 Kg
103
1
35.3
2.205
0.984×10-3
1.103×10-3
1 oz
28.35
2.835×10-2
1
6.246×10-2
2.788×10-5
3.125×10-5
1 lb
454
0.454
16.01
1
4.463×10-4
5.00×10-4
1 Brit.ton
1.016×106
1.016×103
3.587×104
2.24×103
1
1.120
1 U.S.ton
0.907×106
0.907×103
3.2X104
2.00×103
0.893
1

Tempature Conversion tc (°C) — tf (°F)

1.8 x tc (°C) + 32 = tf (°F)

0.556 x tf (°F) – 17.78 =tc (°C)
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