Pressure Converter
Convert pressure measurements between PSI, bar, pascal, atmosphere, and other pressure units.
Popular Pressure Conversions
Complete List of Pressure Units for Conversion
1 Decapascal [daPa] = 10.0000 Pascal [Pa]
1 Hectopascal [hPa] = 100.000 Pascal [Pa]
1 Kilopascal [kPa] = 1000.00 Pascal [Pa]
1 Megapascal [MPa] = 1.00000e+6 Pascal [Pa]
1 Gigapascal [GPa] = 1.00000e+9 Pascal [Pa]
1 Micropascal [µPa] = 0.00000100000 Pascal [Pa]
1 Bar [bar] = 100000 Pascal [Pa]
1 Millibar [mbar] = 100.000 Pascal [Pa]
1 Microbar [µbar] = 0.100000 Pascal [Pa]
1 Standard Atmosphere [atm] = 101325 Pascal [Pa]
Standard Atmosphere to Pascal, Pascal to Standard Atmosphere
1 Pound-force per Square Inch [psi] = 6894.76 Pascal [Pa]
Pound-force per Square Inch to Pascal, Pascal to Pound-force per Square Inch
1 Pound-force per Square Foot [psf] = 47.8803 Pascal [Pa]
Pound-force per Square Foot to Pascal, Pascal to Pound-force per Square Foot
1 Kilopound per Square Inch [ksi] = 6.89476e+6 Pascal [Pa]
Kilopound per Square Inch to Pascal, Pascal to Kilopound per Square Inch
1 Torr [Torr] = 133.322 Pascal [Pa]
1 Millimeter of Mercury [mmHg] = 133.322 Pascal [Pa]
Millimeter of Mercury to Pascal, Pascal to Millimeter of Mercury
1 Inch of Mercury [inHg] = 3386.39 Pascal [Pa]
1 Kilogram-force per Square Centimeter [kgf/cm²] = 98066.5 Pascal [Pa]
Kilogram-force per Square Centimeter to Pascal, Pascal to Kilogram-force per Square Centimeter
1 Kilogram-force per Square Meter [kgf/m²] = 9.80665 Pascal [Pa]
Kilogram-force per Square Meter to Pascal, Pascal to Kilogram-force per Square Meter
1 Newton per Square Centimeter [N/cm²] = 10000.0 Pascal [Pa]
Newton per Square Centimeter to Pascal, Pascal to Newton per Square Centimeter
1 Newton per Square Millimeter [N/mm²] = 1.00000e+6 Pascal [Pa]
Newton per Square Millimeter to Pascal, Pascal to Newton per Square Millimeter
Understanding pressure units
Pressure is force per unit area. The pascal (Pa) is the SI unit, but many other units are used in different contexts. PSI (pounds per square inch) is common in the US, bar is used in meteorology and engineering, and atmospheres represent average sea-level air pressure.
Common pressure relationships
- 1 bar = 100,000 pascals
- 1 PSI ≈ 6,894.76 pascals
- 1 atmosphere = 101,325 pascals
- 1 bar ≈ 14.5038 PSI
When to use each pressure unit
Pascals and kilopascals are used in scientific and engineering contexts. Bar is commonly used in meteorology, scuba diving, and some engineering applications. PSI is widely used in the United States for tire pressure, hydraulics, and general engineering. Atmospheres are used in chemistry and physics to describe standard pressure conditions.
Frequently Asked Questions
- How many PSI are in a bar?
- One bar equals approximately 14.5038 PSI. This is a commonly needed conversion for tire pressure and other applications.
- 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. Most pressure gauges show gauge pressure.