Pressure
Convert kilopascal (kPa) to standard atmosphere (atm). Pressure is force per unit area. Process engineers move constantly between SI (kPa, bar) and US (psi) units, and between absolute and gauge.
1 kPa = 0.009869233 atm
To convert kilopascal to standard atmosphere, multiply the kPa value by 0.009869233. To go the other way, divide by 0.009869233 (or multiply by 101.325).
| kPa | atm |
|---|---|
| 1 | 0.009869233 |
| 2 | 0.01973847 |
| 5 | 0.04934616 |
| 10 | 0.09869233 |
| 25 | 0.2467308 |
| 50 | 0.4934616 |
| 100 | 0.9869233 |
| 250 | 2.467308 |
| 500 | 4.934616 |
| 1000 | 9.869233 |
Line and vessel ratings, pump discharge heads, and relief set points are all specified in pressure units — usually psi or barg in the field and kPa in calculations.
Always track whether a value is absolute or gauge: 0 barg equals about 101.3 kPa absolute, and mixing the two is a common and costly error.
Worked example. A pressure of 1000 kPa is 9.869233 atm.
Multiply the value in kPa by 0.009869233 to get atm. For example, 10 kPa = 0.09869233 atm.
1 kPa equals 0.009869233 atm.
Line and vessel ratings, pump discharge heads, and relief set points are all specified in pressure units — usually psi or barg in the field and kPa in calculations.