Pressure Converter

How to Use the Pressure Converter

1. Enter the pressure value you want to convert.
2. Select the original pressure unit.
3. Select the unit you want to convert to.
4. Click Convert Pressure to display the result.
5. Use Reset to clear the value and restore the default units.

What Is Pressure?

Pressure describes the force applied per unit area. It is measured in different units across science, engineering, weather reporting, industry and everyday applications. This converter uses Pascals as its common calculation base to convert between the listed units.

Common Pressure Units

Pascal (Pa)

The Pascal is the SI unit of pressure. One Pascal equals one newton per square meter.

Kilopascal (kPa) and Megapascal (MPa)

One kilopascal equals 1,000 Pascals, while one megapascal equals 1,000,000 Pascals. These units are useful in engineering and technical pressure measurements.

Bar and Millibar

One bar equals 100,000 Pascals. Millibars are commonly encountered in weather reporting; one millibar equals 100 Pascals.

Pounds per Square Inch (PSI)

PSI is widely used for tire pressure, hydraulic systems, compressors and other mechanical applications.

Atmosphere (atm)

The standard atmosphere is a reference unit equal to exactly 101,325 Pascals.

Millimeters of Mercury (mmHg) and Torr

These units are used in several pressure-measurement settings. They are very close in size but are not exactly identical under the conventional definitions used by this calculator.

Inches of Mercury and Inches of Water

Inches of mercury (inHg) and inches of water (inH₂O) are used in selected atmospheric, ventilation and pressure applications. Their conversion values depend on the adopted conventional reference definitions.

Pressure Conversion Formulas

The calculator first converts the entered value to Pascals and then divides by the conversion factor for the destination unit.

Common Pressure Conversion Examples

• 1 kPa = 1,000 Pa
• 1 MPa = 1,000,000 Pa
• 1 bar = 100,000 Pa
• 1 standard atmosphere = 101,325 Pa
• 1 psi ≈ 6,894.7573 Pa
• 1 bar = 100 kPa
• 1 atmosphere ≈ 1.01325 bar
• 1 atmosphere = 760 Torr

Values shown with an approximation symbol are rounded for convenient reference.

Related Tools

Frequently Asked Questions