Pressure Unit Definitions
Our Pressure Converter helps you convert between pascals, atmospheres, psi, bar, and torr. Essential for engineering, weather forecasting, and automotive work, this tool provides precise pressure conversions for tire pressure, atmospheric conditions, and industrial applications.
Pascal (Pa)
The pascal is the SI derived unit of pressure, named after the French physicist Blaise Pascal. One pascal is defined as one newton per square meter. It is widely used in scientific and engineering applications.
Kilopascal (kPa)
A kilopascal equals 1,000 pascals. It is commonly used for measuring tire pressure, blood pressure, and atmospheric pressure variations.
Pound per Square Inch (PSI)
PSI is a unit of pressure expressing pounds of force per square inch of area. It is commonly used in the United States for measuring tire pressure, water pressure, and hydraulic systems.
Bar (bar)
A bar is a unit of pressure approximately equal to atmospheric pressure at sea level. One bar equals 100,000 pascals or 14.5 PSI. It is commonly used in meteorology and industrial applications.
Atmosphere (atm)
One atmosphere is defined as the atmospheric pressure at sea level. It equals 101,325 pascals, 101.325 kilopascals, or 14.696 PSI.
Torr
A torr is a unit of pressure equal to 1/760 of an atmosphere or approximately 133.322 pascals. It is named after Evangelista Torricelli, the inventor of the barometer. The torr is commonly used in vacuum measurements and scientific applications.
Frequently Asked Questions on Pressure Conversion
Q: How to convert PSI to bar?
Multiply PSI by 0.0689476. Example: 14.7 PSI = 1.013 bar (approximately 1 atm).
Q: What is atmospheric pressure at sea level?
Standard atmospheric pressure at sea level is 14.7 PSI, 101.325 kPa, or 1.01325 bar.
Q: How does pressure change with altitude?
Pressure decreases with altitude. At 5,000 feet, atmospheric pressure is about 12.2 PSI; at 18,000 feet it's 7.34 PSI.
Popular Pressure Conversions
Common searches: psi to bar | bar to psi | pascal to atm | atm to psi.
Our free online pressure converter provides instant, accurate results for PSI to bar, Pascal to ATM, and bar to PSI and more. Perfect for engineering, automotive, diving, and scientific applications.