Absolute Vacuum Services Ltd

Your High Vacuum specialists

Technical Mobile: 0274 853 035 Phone: 09 294 7380 Sales Mobile: 0272 853 035

Vacuum Conversion Tables

Pressure Conversion Table

  mbar bar torr Pa atm in Hg mm Hg in H2O mm H2O
1 mbar 1 1x10-3 0.75 1x102 9.87x10-4 2.95x10-2 0.75 0.40 10.20
1 bar 1x103 1 7.5x102 1x103 0.987 29.53 7.5x102 4.02x102 1.02x104
1 torr 1.33 1.33x103 1 1.33x102 1.32x10-3 1.36x10-2 1 0.54 13.59
1 Pa 0.01 1x10-5 7.5x10-3 1.01x105 1 2.95x10-4 7.6x10-3 4.02x10-3 0.102
1 atm 1.01x103 1.013 7.6x102 1.013x105 1 29.92 7.6x102 4.07x102 1.03x104
1 in Hg 33.86 3.39x10-2 25.4 3.39x103 3.34x10-2 1 25.4 13.6 3.45x102
1 mm Hg 1.33 1.33x10-3 1 1.33x103 1.32x10-3 3.94x10-2 1 0.535 13.59
1 in H2O 2.49 2.49x10-3 1.868 2.49x102 2.46x10-3 7.36x10-2 1.87 1 25.4
1 mm H2O 9.81x10-2 9.81x10-5 7.35x10-2 9.81 9.68x10-5 2.90x10-3 7.35x10-2 3.39x10-2 1

 

Leak Rate Conversion Table

  mbar l/s-1 torr l/s-1 atm cm3s-1 atm ft3min-1 kg/h air (20o-C)
1 mbar l/s-1 1 0.75 0.987 2.097x10-3 4.3x10-3
1 torr l/s-1 1.333 1 1.316 2.795x10-3 5.7x10-3
1 atm cm3 s-1 1.013 0.76 1 2.12x10-3 4.3x10-3
1 atm ft3 min-1 4.78x102 3.58x102 4.72x102 1 -
1kg/h air (20oC) 230 175 230 - 1

 

Pumping Speed Units Table

  l/s-1 l/min-1 ft3min-1 lm3/h-1
1 l/s-1 1 60 2.12 3.60
1 l/min-1 0.0167 1 0.0353 0.06
1 ft3min-1 0.472 28.32 1 1.70
1 m3/h-1 0.278 16.67 0.5890 1