Pressure Converter
Convert between Pascal, Bar, PSI, Atmosphere, Torr, and other pressure units instantly
Quick Examples
What is Pressure?
Pressure is the force applied perpendicular to the surface of an object per unit area. It is a fundamental physical quantity that plays a crucial role in various fields including physics, engineering, meteorology, and medicine.
The SI unit of pressure is the Pascal (Pa), which is equivalent to one newton per square meter (N/m²). However, many other units are commonly used depending on the application and region, such as bar, PSI (pounds per square inch), atmospheres, and torr.
Common Pressure Units Explained
Pascal (Pa)
The SI unit of pressure. 1 Pascal equals 1 Newton per square meter. Used in scientific calculations and engineering.
Bar
A metric unit commonly used in meteorology and engineering. 1 bar equals 100,000 Pascals, roughly equal to atmospheric pressure at sea level.
PSI (Pounds per Square Inch)
Common in the United States for tire pressure, hydraulics, and industrial applications. 1 PSI equals approximately 6,894.76 Pascals.
Atmosphere (atm)
Based on average atmospheric pressure at sea level. 1 atm equals 101,325 Pascals. Used in chemistry and diving.
Torr / mmHg
Used in medicine (blood pressure) and vacuum systems. 1 Torr equals approximately 133.322 Pascals, roughly equal to 1 millimeter of mercury.
Common Applications
Weather & Meteorology
Atmospheric pressure is typically measured in millibars (mbar) or inches of mercury (inHg). Standard atmospheric pressure at sea level is approximately 1013.25 mbar or 29.92 inHg.
Automotive & Tire Pressure
Tire pressure is commonly measured in PSI in the United States or bar in most other countries. Typical passenger car tire pressure ranges from 30-35 PSI (2.0-2.4 bar).
Medical Applications
Blood pressure is measured in millimeters of mercury (mmHg). A normal blood pressure reading is around 120/80 mmHg. Medical vacuum systems and respiratory equipment also use pressure measurements.
Industrial & Engineering
Hydraulic systems, compressed air systems, and industrial processes use various pressure units depending on the region and application, typically bar, PSI, or kilopascals (kPa).
Frequently Asked Questions
How do I convert PSI to bar?
To convert PSI to bar, multiply the PSI value by 0.0689476. For example, 100 PSI equals approximately 6.89 bar. Our converter handles this calculation automatically with high precision.
What is the difference between absolute and gauge pressure?
Absolute pressure is measured relative to a perfect vacuum (zero pressure), while gauge pressure is measured relative to atmospheric pressure. Absolute pressure = Gauge pressure + Atmospheric pressure.
Is this pressure converter accurate?
Yes, our converter uses standard conversion factors and provides high-precision results. All conversions are based on internationally recognized standards and are suitable for both everyday and professional use.
Can I use this for scientific calculations?
Absolutely! Our pressure converter provides high-precision conversions suitable for scientific and engineering applications. The tool displays results in both standard and scientific notation when appropriate.
Is my data secure when using this tool?
Yes, completely! All conversions are performed entirely in your browser using JavaScript. No data is sent to any server, ensuring complete privacy and security.