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Pressure Unit Converter

Convert pressure units between Pascal (Pa), Bar, PSI, Torr / mmHg, Atmosphere (atm), and Kilopascals (kPa).

About This Tool

The Pressure Unit Converter instantly converts pressure measurements between SI metric units (Pascal, kPa, MPa, Bar), imperial units (PSI), and barometric mercury units (Torr, mmHg, inHg, atm).

Key Features

Converts between Pascal (Pa), Kilopascal (kPa), Megapascal (MPa), Bar, PSI, Torr, and atm
Simultaneous results across all 7 pressure standards
Calculates standard atmospheric pressure references
Scientific notation for extreme vacuum and high-pressure ranges

How to Use This Tool

  1. Enter a pressure numerical value.
  2. Select your source pressure unit (e.g. PSI, Bar, kPa).
  3. Instantly view the converted pressures.

Why Use This Tool

  • Convert tire pressure, HVAC refrigeration specs, and hydraulic systems between PSI and Bar.
  • Calibrate weather barometer readings (hPa, inHg, mmHg).

Pro Tips

  • 1 standard atmosphere (atm) is defined as exactly 101,325 Pa (14.6959 PSI or 760 mmHg).

Frequently Asked Questions

How many PSI are in 1 Bar?

1 Bar equals approximately 14.5038 Pounds per Square Inch (PSI) or 100,000 Pascals (100 kPa).

What is standard atmospheric pressure?

Standard atmosphere (1 atm) is 101,325 Pascals (101.325 kPa), 14.696 PSI, or 760 mmHg/Torr.

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