Pressure Converter
Pressure is force applied over an area. The SI unit is the pascal, but engineering and weather reports commonly use bar, psi, atmospheres, or millimeters of mercury. These conversions treat readings as absolute pressure; gauge readings add or subtract atmospheric pressure.
About pressure conversion
Pressure conversion is commonly needed when tire inflation, weather forecasting, diving, and industrial systems.
Popular conversions
All pressure units
| Unit | Symbol | System |
|---|---|---|
| Pascal | Pa | SI |
| Kilopascal | kPa | SI |
| Megapascal | MPa | SI |
| Bar | bar | Metric |
| Millibar | mbar | Metric |
| Pound per Square Inch | psi | Imperial |
| Standard Atmosphere | atm | Other |
| Torr | Torr | Other |
| Millimeter of Mercury | mmHg | Other |
| Inch of Mercury | inHg | Imperial |
Frequently asked questions
What is the base unit for pressure?
Pressure conversions on this site are calculated against the pascal (Pa).
Which pressure units can I convert?
You can convert between 10 units, including pascal, kilopascal, megapascal, bar, and more.
Where is pressure conversion useful?
It is commonly needed when tire inflation, weather forecasting, diving, and industrial systems.
Does this converter mix measurement systems?
The converter supports SI, Metric, Imperial, Other units and keeps their exact definitions separate so results stay accurate.