Air Pressure Converter
Convert air and gas pressure between PSI, bar, kPa, MPa, atm, mmHg, and inHg.
Covers tire inflation, barometric pressure, HVAC, and scuba tank calculations.
Type in any field — the others update instantly.
Air pressure is measured in many units depending on the application.
Base unit: Pascal (Pa)
- 1 kPa = 1,000 Pa
- 1 bar = 100,000 Pa = 100 kPa
- 1 atm = 101,325 Pa = 101.325 kPa
- 1 PSI = 6,894.76 Pa = 6.89476 kPa
- 1 mmHg (torr) = 133.322 Pa
- 1 inHg = 3,386.39 Pa
Common conversions:
- 1 atm = 14.696 PSI = 1.01325 bar = 760 mmHg = 29.921 inHg
- 1 bar = 14.504 PSI = 100 kPa
- 1 PSI = 0.06895 bar = 6.895 kPa
Practical applications:
| Application | Typical Range | Common Unit |
|---|---|---|
| Car tires | 30–35 PSI / 2.1–2.4 bar | PSI or bar |
| Bicycle tires | 60–130 PSI / 4–9 bar | PSI or bar |
| Weather reports | 28.5–31 inHg / 965–1050 hPa | inHg or hPa |
| Blood pressure | 80–180 mmHg | mmHg |
| HVAC ducts | 0.05–1 inWG | inches of water |