Pressure Converter | Convert Pa, kPa, MPa, bar, psi, atm, torr

📖 How to Use This Pressure Converter

Enter the value - Type the pressure value you want to convert.

Select the source unit - Choose the unit of your input value (e.g., psi, bar, atm).

Select the target unit - Choose the unit you want to convert to (e.g., Pa, kPa, torr).

Get instant results - The converted value appears automatically as you type or change units.

📊 Understanding Pressure Units

Pressure is the force applied perpendicular to a surface per unit area. Different fields use different units:

Pascal (Pa): SI unit of pressure. 1 Pa = 1 N/m². Very small unit.
Kilopascal (kPa): 1 kPa = 1000 Pa. Common in meteorology and engineering.
Megapascal (MPa): 1 MPa = 1,000,000 Pa. Used for material strength and hydraulics.
Bar (bar): 1 bar = 100,000 Pa ≈ atmospheric pressure at sea level. Used in meteorology and scuba diving.
Pounds per square inch (psi): Imperial unit. Common in US for tire pressure, hydraulics, and industrial applications.
Atmosphere (atm): 1 atm = 101,325 Pa. Standard atmospheric pressure at sea level.
Torr (mmHg): 1 torr = 133.322 Pa. Used in vacuum physics and medicine (blood pressure).

📊 Common Pressure Conversions

Atmospheric Pressure (1 atm):
• 1 atm = 101,325 Pa = 101.325 kPa = 0.1013 MPa
• 1 atm = 1.01325 bar = 14.6959 psi = 760 torr

Common Conversions:
• 1 bar = 100 kPa = 14.5038 psi
• 1 psi = 6.89476 kPa = 0.0689476 bar
• 1 torr = 133.322 Pa = 0.0193368 psi

💡 Real-World Applications

Tire Pressure: Car tires typically 30-35 psi (2.07-2.41 bar)
Blood Pressure: Measured in mmHg (torr) - normal ~120/80 mmHg
Weather: Barometric pressure in millibars (1 mbar = 100 Pa)
Scuba Diving: Pressure increases 1 atm every 10 meters (33 feet) underwater
HVAC: Refrigerant pressures in psi or bar
Industrial Hydraulics: Often measured in MPa or bar

❓ Frequently Asked Questions (FAQ)

How do I convert psi to bar?

Divide psi by 14.5038. For example, 30 psi ÷ 14.5038 = 2.07 bar. Our converter does this automatically.

What is standard atmospheric pressure in psi?

Standard atmospheric pressure at sea level is 14.6959 psi (approximately 14.7 psi).

What is the difference between bar and millibar?

1 bar = 1000 millibars (mbar). Millibars are commonly used in weather reports (e.g., 1013 mbar = 1.013 bar).

What is a Pascal in practical terms?

One Pascal is a very small pressure - roughly the pressure exerted by a sheet of paper resting on a table. That's why kilopascals (kPa) and megapascals (MPa) are more commonly used.

How does altitude affect atmospheric pressure?

Atmospheric pressure decreases with altitude. At 5,000 feet (1,524 m), pressure is about 12.2 psi (0.83 atm). At 10,000 feet (3,048 m), it's about 10.1 psi (0.69 atm).

What is the difference between absolute pressure and gauge pressure?

Gauge pressure measures pressure relative to atmospheric pressure (e.g., tire pressure). Absolute pressure includes atmospheric pressure (gauge + 14.7 psi at sea level). This converter uses absolute pressure values.