Pressure Converter
Standard Atmospheric Pressure (1 atm)
Pascal (Pa)101,325
Kilopascal (kPa)101.325
Megapascal (MPa)0.101325
Bar1.01325
Millibar (mbar)1,013.25
PSI14.6959494
Atmosphere (atm)1
Torr (mmHg)759.99982
inHg29.9212524
Pressure Unit Converter: Pascal, Bar, PSI, ATM & More
Pressure is force applied per unit area and is measured in a wide variety of units across different industries. Meteorologists use millibars, tire gauges display PSI, scientists prefer pascals, and divers think in atmospheres. This free converter supports nine common pressure units and performs real-time conversions.
How to Use
- Enter a numeric pressure value in the input field.
- Choose your source unit from the dropdown menu.
- All equivalent values appear instantly in the result cards.
- Check the reference table for standard atmospheric pressure in every unit.
FAQ
- What is standard atmospheric pressure?
- Standard atmospheric pressure (1 atm) is defined as exactly 101,325 pascals. This is roughly the average air pressure at sea level.
- What is the difference between bar and atm?
- 1 bar = 100,000 Pa, while 1 atm = 101,325 Pa. They are close but not identical. Bar is commonly used in industry and meteorology, while atm is used in chemistry and diving.
- What does PSI stand for?
- PSI stands for "pounds per square inch." It is widely used in the United States for tire pressure, hydraulic systems, and compressed gas.
- What is Torr / mmHg?
- Torr and millimeters of mercury (mmHg) are nearly identical units. 1 Torr ≈ 1 mmHg ≈ 133.32 Pa. They are commonly used in vacuum engineering and blood pressure measurement.
- How do I convert PSI to bar?
- Divide the PSI value by 14.5038. For example, 30 PSI ÷ 14.5038 ≈ 2.068 bar. Alternatively, multiply PSI by 0.0689476.