Pascal Conversion
Convert pascals to any pressure unit with this free converter. Works with hPa, kPa, MPa, bar, atm, psi, mmHg, inHg, and torr for engineers and scientists.
About This Calculator
The Pascal Conversion calculator is a free online pressure converter that instantly converts between all major pressure units. Whether you need to convert pascals to PSI for automotive applications, pascals to bar for industrial use, or any other combination of pressure units, this tool provides accurate results for engineers, scientists, meteorologists, students, and professionals worldwide.
The conversion uses precise coefficients based on the pascal (Pa) as the base SI unit. Each pressure unit is converted to pascals first, then to the target unit. For example, 1 atm = 101,325 Pa, 1 bar = 100,000 Pa, 1 PSI = 6894.76 Pa, and 1 mmHg = 133.322 Pa. The calculator supports all common pressure units including pascals, hectopascals, kilopascals, megapascals, bar, atmosphere, PSI, mmHg, inHg, and torr.
Regional Notes
United States: PSI is the standard unit for tire pressure (30–35 PSI for passenger cars), HVAC systems, and industrial pressure gauges. Weather reports may use inches of mercury (inHg) for barometric pressure.
India: India follows the SI system with pascals (Pa), kilopascals (kPa), and bars most common in engineering and industry. Tire pressures are often displayed in both kPa and PSI on gauges. Weather reports use hectopascals (hPa).
United Kingdom: The UK uses a mix — tire pressures in PSI, weather in hectopascals (hPa), engineering in pascals or bars, and medical blood pressure in millimeters of mercury (mmHg).
Frequently Asked Questions
What is a pascal (Pa)?
A pascal (Pa) is the SI unit of pressure, defined as one newton of force per square meter. It is named after the French mathematician and physicist Blaise Pascal. One pascal is a relatively small unit; everyday pressures are typically measured in kilopascals (kPa) or megapascals (MPa).
How do you convert pascals to PSI?
To convert pascals (Pa) to pounds per square inch (PSI), divide the pressure in pascals by 6894.76. For example, 101,325 Pa (1 atm) divided by 6894.76 equals approximately 14.696 PSI. This converter does the calculation instantly for any value you enter.
What is the difference between bar and pascal?
A bar is a metric unit of pressure equal to 100,000 pascals (100 kPa). It is commonly used in meteorology, engineering, and industrial applications. While the pascal is the official SI unit, the bar is more practical for everyday pressure measurements like tire pressure, where 1 bar equals approximately 14.5 PSI.
What are the common units of pressure?
The common units of pressure include pascal (Pa), hectopascal (hPa), kilopascal (kPa), megapascal (MPa), bar, atmosphere (atm), pounds per square inch (psi), millimeters of mercury (mmHg), inches of mercury (inHg), and torr. Meteorologists use hectopascals, engineers use pascals and bars, and the US uses PSI for tire and hydraulic pressure.
How do you convert pressure to atmospheres?
One standard atmosphere (atm) equals 101,325 pascals. To convert any pressure to atmospheres, divide the pressure in pascals by 101,325. For example, 202,650 Pa divided by 101,325 equals 2 atm. This converter supports direct conversion between all common pressure units including atm.
Is this pressure converter free to use?
Yes, this pascal conversion tool is completely free to use with no registration, downloads, or usage limits. You can make unlimited conversions between all supported pressure units and share the results using the generated permalink.
What is standard atmospheric pressure in different units?
Standard atmospheric pressure at sea level is 101,325 Pa, which equals 1013.25 hPa, 101.325 kPa, 0.101325 MPa, 1.01325 bar, 1 atm, 14.696 PSI, 760 mmHg, 29.92 inHg, and 760 torr. This converter shows all these equivalents instantly.
Which countries use PSI vs pascals for pressure measurement?
The United States primarily uses PSI (pounds per square inch) for tire pressure, hydraulic systems, and industrial applications. India officially uses the SI system (pascals and kilopascals) but PSI is still found on imported equipment. The United Kingdom uses a mix: tire pressures in PSI, while scientific and engineering contexts use pascals or bars.