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Pressure Converter with Log History

Convert between PSI, Pascal, Bar, Atmosphere, Torr, and more pressure units with browser-based conversion history

Pressure
PSI
Pascal
Bar
Atmosphere
Unit Conversion
Enter any positive pressure value for conversion.

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Quick Reference

Common Pressure Conversions

1 PSI6,894.76 Pa / 0.0689 bar
1 Bar100,000 Pa / 14.5 PSI
1 Atmosphere101,325 Pa / 14.696 PSI
1 Torr133.32 Pa / 1 mmHg
Tire Pressure (32 PSI)2.2 bar / 220 kPa
Sea Level1 atm / 1013.25 mbar

Conversion Formulas

1 PSI = 6,894.76 Pa = 0.0689 bar
1 bar = 100,000 Pa = 14.5 PSI
1 atm = 101,325 Pa = 1.01325 bar
1 kPa = 1,000 Pa = 0.145 PSI
1 Torr = 133.32 Pa ≈ 1 mmHg

Sample Pressures

About Pressure Converter

Pressure Units

Pressure can be measured in different units. This tool supports 9 major units: Pascal (Pa) - the SI unit, Kilopascal (kPa), Bar - metric unit, PSI (pounds per square inch) - imperial unit, Atmosphere (atm) - standard atmospheric pressure, Torr and mmHg - medical/vacuum applications, Inch of Mercury (inHg) - weather, and Millibar (mbar) - meteorology.

Common Use Cases

  • Tire Pressure: Convert between PSI (US) and bar or kPa (Europe/Asia)
  • Weather: Convert barometric pressure between mbar, inHg, and mmHg
  • HVAC & Plumbing: Work with PSI, bar, and kPa for system pressures
  • Scientific Research: Convert between Pascal, atm, and Torr
  • Medical: Blood pressure measurements in mmHg

History Feature

Successfully converted pressures are automatically saved to your browser's local storage. You can revisit previous conversions, compare different pressures, and manage your conversion history.

Privacy & Security

All pressure conversions happen in your browser. No data is sent to our servers. History is stored locally in your browser and can be cleared at any time.

Frequently Asked Questions (FAQ)

What pressure units can I convert between?
This tool supports conversion between 9 pressure units: Pascal (Pa), Kilopascal (kPa), Bar, PSI (pounds per square inch), Atmosphere (atm), Torr, Millimeter of Mercury (mmHg), Inch of Mercury (inHg), and Millibar (mbar). You can convert from any unit to all others simultaneously.
How do I convert PSI to Bar?
To convert PSI to Bar, multiply by 0.0689476. For example, 1 PSI = 0.0689476 bar, and 100 PSI = 6.89476 bar. Simply enter your PSI value and select PSI as the input unit to see all conversions.
What is the difference between PSI and Pascal?
PSI (pounds per square inch) is an imperial unit commonly used in the US, while Pascal (Pa) is the SI unit of pressure used internationally. 1 PSI equals approximately 6,894.76 Pascals. Pascal is the standard scientific unit.
What is atmospheric pressure?
Standard atmospheric pressure at sea level is 1 atmosphere (atm), which equals 101,325 Pascals, 14.696 PSI, or 1.01325 bar. This is the pressure exerted by the weight of the atmosphere at sea level.
When would I use Bar vs PSI?
Bar is commonly used in Europe and for metric measurements (tire pressure, weather, industrial applications). PSI is primarily used in the United States for tire pressure, compressed air, and industrial applications. 1 bar ≈ 14.5 PSI.
What are Torr and mmHg used for?
Torr and mmHg (millimeter of mercury) are nearly identical units (1 Torr ≈ 1 mmHg) commonly used in medicine (blood pressure), vacuum systems, and barometric pressure. They relate to the height of a mercury column in a barometer.
Is my conversion history secure?
Yes, all conversions happen locally in your browser. Your conversion history is stored only in your browser's local storage and is never sent to any servers.
How accurate are the conversions?
All conversions use internationally accepted conversion factors with floating-point precision. Results are displayed with 4 decimal places by default for high accuracy in professional and scientific applications.
Can I use this for tire pressure?
Absolutely! This tool is perfect for converting tire pressure between PSI (common in the US) and bar or kPa (common in Europe and Asia). Just enter your tire pressure and see all equivalent values.