Pressure Converter
Convert pascal, bar, psi, atm, torr and more.
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Pascal (Pa)
Kilopascal (kPa)
| Unit | 1 Pa equals |
|---|---|
| Pascal (Pa) | 1 |
| Kilopascal (kPa) | 0.001 |
| Megapascal (MPa) | 0.000001 |
| Bar (bar) | 0.00001 |
| PSI (psi) | 0.000145038 |
| Atmosphere (atm) | 0.00000986923 |
| Torr (Torr) | 0.00750064 |
| mmHg (mmHg) | 0.00750064 |
How it works
- 1 atm = 101,325 Pa
- 1 bar = 14.5038 psi
- 1 psi ≈ 6.895 kPa
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Frequently asked
What is 1 atmosphere in psi?
1 atm ≈ 14.696 psi.
Where you'll actually use this
Pressure measures force per unit area. The SI unit is the pascal (Pa), but everyday use spans bar, psi, atm, mmHg, and torr.
- Tire pressure
Most cars list psi in the US, kPa or bar in Europe. 32 psi ≈ 2.2 bar ≈ 220 kPa.
- Weather
Atmospheric pressure is reported in hPa (hectopascals) or millibars (1 hPa = 1 mbar). 'Inches of mercury' (inHg) is still used in US aviation.
- Diving & medical
Blood pressure is measured in mmHg; scuba tank pressure in bar or psi.
Common mistakes to avoid
- Gauge vs absolute
Tire pressure is gauge pressure (relative to atmospheric). Absolute pressure adds ~1 atm (14.7 psi) on top.
Did you know?
Standard atmospheric pressure (101,325 Pa) is the force of a column of air reaching the top of the atmosphere.
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Accuracy & sources
How this tool is built and verified.
- Source
- Standards-aligned factors
- Last reviewed
- Q2 2026
- Status
- Verified
- International System of Units (SI)BIPM — Bureau International des Poids et Mesures · The International System of Units (SI Brochure), 9th edition
- ISO 80000 — Quantities and UnitsISO / IEC · ISO 80000-1:2022
- Standards aligned
- Formula verified
- Editor reviewed
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