How to Convert Pressure Units (atm, Pa, bar, psi)

Pressure is a fundamental physical quantity used in many fields such as physics, engineering, meteorology, and medicine. Understanding how to convert pressure units is crucial for accurate measurements and communication worldwide.

This guide will help you easily convert between atmospheres (atm), pascals (Pa), bars (bar), and pounds per square inch (psi), providing context on each unit and when to use them.

Step 1: Access the Converter Tool

Visit our Pressure Converter page to get started.

Step 2: Enter the Pressure Value

Input the numeric value of pressure you want to convert. For example, 1.

Tip: Use the value from your measurement device or experiment.

Step 3: Select the Original Unit

Choose the unit corresponding to your pressure value:

  • atm (atmosphere): Common in meteorology and scuba diving.
  • Pa (pascal): SI unit, widely used in science and engineering.
  • bar: Often used in industrial applications.
  • psi: Used primarily in the US, especially automotive and mechanical fields.

Step 4: Select the Unit to Convert To

Select the target unit you want the pressure value converted into. This can be any of the units above.

Step 5: Convert

Click the Convert button to see the converted value instantly.

Step 6: Review the Result

The result will be displayed right below the form, showing the equivalent pressure in the chosen unit.