Tabela służąca do przeliczania jednostek ciśnienia: Pa, mmH2O, at, atm, bar.
| Jedn. | 1 Pa | 1 kPa | 1 bar | 1 mbar | 1mm H2O | 1 atm | 1 at |
| 1 Pa | 1 | 10-3 | 10-5 | 0.001 | 0.102 | 9,87*10-6 | 1,02*10-5 |
| 1 kPa | 1000 | 1 | 0,01 | 10 | 102 | 9,87*10-3 | 1,02*10-2 |
| 1 bar | 105 | 100 | 1 | 1000 | 10,2*104 | 0,987 | 1,02 |
| 1 mbar | 100 | 0,1 | 10-3 | 1 | 10,2 | 9,87*10-4 | 1,02*10-3 |
| 1mm H20 | 9,81 | 9,81*10-3 | 9,81*10-5 | 9,81*10-2 | 1 | 9,87*10-5 | 10-4 |
| 1 atm | 1,01*105 | 101 | 1,01 | 1010 | 10332 | 1 | 1,033 |
| 1 at | 9,81*104 | 98,1 | 0,981 | 981 | 10000 | 0,968 | 1 |