Convert between pascals, bars, PSI, atmospheres and more in one step. Enter a value, pick your units, and see the result across every common pressure unit instantly.
| Pascal (Pa) | |
| Kilopascal (kPa) | |
| Millibar (mbar) | |
| Bar (bar) | |
| PSI (psi) | |
| Atmosphere (atm) | |
| Millimetres of mercury (mmHg) | |
| Inches of mercury (inHg) |
How to Use
- Enter the pressure value you want to convert.
- Choose the unit you are converting from.
- Choose the unit you want to convert to, or press Swap to reverse the direction.
- Press Convert — the result appears above, with every other unit listed in the table.
Key Features
- Eight pressure units — pascals, kilopascals, millibars, bars, PSI, atmospheres, mmHg and inHg.
- Live results — the conversion updates as you type, with a full comparison table.
- One-click swap — reverse the conversion direction instantly.
- 100% private — runs entirely in your browser; nothing is sent or stored.
FAQs
What is PSI?
Pounds per square inch, the pressure unit most often used in the United States — for example, for tyre pressures. One PSI equals about 6894.76 pascals.
What is the difference between bar and millibar?
One bar equals 1000 millibars. Millibars (hectopascals) are the unit you will usually see in weather forecasts.
How accurate are the conversions?
The tool uses standard international conversion factors and shows up to 8 significant figures, which is plenty for motoring, weather and workshop use.
Is my data sent anywhere?
No. Everything runs entirely in your browser and never transmits or saves your entries.
Related Tools
Try these related tools: Unit Converter, Data Size Converter and Speed Calculator.