Kpa to Mbar Converter
Common Conversions
| kPa | mbar |
|---|---|
| 0.1 | 1 |
| 1 | 10 |
| 5 | 50 |
| 10 | 100 |
| 20 | 200 |
| 50 | 500 |
| 75 | 750 |
| 100 | 1000 |
| 101.325 | 1013.25 |
| 150 | 1500 |
| 200 | 2000 |
Why this conversion matters in chemistry
European-made rotary evaporator manuals spec set-points in mbar; the building's process-control system reports the same line in kPa. A 50 kPa reservoir on a rotovap shows 500 mbar on the controller — well above the 72 mbar boiling-point pressure for ethanol at 25 °C, which is exactly where you want it. The factor of 10 mbar per kPa falls out of 1 bar = 100 kPa. So when an SI process datasheet has to match a vacuum gauge calibrated in millibar, this is the trivial decimal shift that closes the gap.
Formula
Worked Examples
Standard atmospheric pressure expressed in both unit systems.
Exactly 1 bar — the IUPAC reference pressure for tabulated thermodynamic data.
The factor anchor — useful when scanning a low-pressure value off a vacuum gauge.
About half an atmosphere — the kind of reduced pressure a rotovap holds for ethanol.