Pressure Converter
Convert between various pressure units including Pa, hPa, bar, psi, and more.
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Pressure Converter
Convert between various pressure units with ease using our comprehensive pressure converter. Whether you’re in aviation, engineering, or research, this tool provides fast and accurate conversions across all common pressure metrics.
Supported Pressure Units
Our tool covers a wide range of pressure units used globally:
- Pascal (Pa): The base SI unit for pressure.
- Hectopascal (hPa): Standard unit for barometric pressure in meteorology (equivalent to millibars).
- Megapascal (MPa): Commonly used in structural engineering and high-pressure systems.
- Bar & Millibar (bar, mbar): Widely used in weather reporting and industrial applications.
- Pounds per Square Inch (psi): The standard unit for tire pressure and hydraulic systems in the US.
- Inch of Mercury (inHg): Essential for aviation altimeter settings and weather barometers (especially in the US).
- Torr (mmHg): Primary unit used in vacuum technology and blood pressure measurement.
- Standard Atmosphere (atm): Used to relate other pressure units to the average atmospheric pressure at sea level.
Professional Use Cases
- Aviation: Seamlessly switch between hPa and inHg for altimeter settings (QNH/QFE) when flying between different regions.
- Engineering: Convert between metric (MPa, bar) and imperial (psi) specifications for machinery and construction.
- Science & Lab: Accurately translate vacuum levels in Torr to standard SI units.
- Automotive: Check and convert tire pressure from psi to bar or kPa.
Save time and ensure accuracy with our high-precision pressure conversion engine.
live_help Frequently Asked Questions (FAQ)
How do pilots use different pressure units?
Pilots use pressure settings to calibrate their altimeters. In most of the world, hectopascals (hPa) or millibars (mbar) are standard. However, in the United States and parts of Canada, inches of mercury (inHg) are used. Our tool helps pilots quickly convert between these two during international flight planning.
What is the difference between hPa and mbar?
There is no difference in value. 1 hectopascal (hPa) is exactly equal to 1 millibar (mbar). “Hectopascal” is the preferred SI unit, while “millibar” is a legacy unit still common in meteorology.
Why are there so many units for pressure?
Different industries have different historical standards. For example, mechanical engineers often use psi, scientists might use Pascals or Torr (for vacuum), and weather services use hPa or inHg. Our converter bridges these gaps.
How do I convert tire pressure?
Most vehicles list recommended tire pressure in psi (pounds per square inch) or bar. If your car manual says 2.2 bar and your pump only shows psi, simply input 2.2 bar into our tool to find it is approximately 32 psi.
What is standard atmospheric pressure?
Standard atmospheric pressure is defined as 1013.25 hPa, which is also equal to 1 atm, 29.92 inHg, or 760 Torr. This represents the average pressure at sea level.