Pressure Unit Converter

Convert between PSI, Bar, kPa, MPa, atm, and other pressure units instantly. Essential for valve selection, pipe sizing, and system design.

From

6.8948

100 PSI (lb/in²)=6.8948 Bar

Quick Reference (100 as base)

100 PSI (lb/in²)=6.8948 Bar

100 Bar=1450.3774 PSI (lb/in²)

100 PSI (lb/in²)=689.4757 kPa

100 Bar=10000.0000 kPa

100 atm (atmosphere)=1469.5949 PSI (lb/in²)

100 kg/cm²=1422.3344 PSI (lb/in²)

Common Conversion Formulas

PSI to Bar

Bar = PSI * 0.0689476

Bar to PSI

PSI = Bar * 14.5038

PSI to kPa

kPa = PSI * 6.89476

Bar to kPa

kPa = Bar * 100

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Frequently Asked Questions

What is PSI?

PSI stands for Pounds per Square Inch. It's a common pressure unit used in the United States and is widely used in industrial applications, especially for valve and pipe pressure ratings.

What is the difference between Bar and PSI?

Bar is a metric unit of pressure, while PSI is an imperial unit. 1 Bar equals approximately 14.5 PSI. Bar is commonly used in Europe and international standards, while PSI is prevalent in North America.

How do I convert PSI to Bar?

To convert PSI to Bar, multiply the PSI value by 0.0689476. For example, 100 PSI = 6.89476 Bar. Alternatively, divide PSI by 14.5038 to get Bar.

What pressure unit should I use for valve specifications?

It depends on the standard you're following. ASME/ANSI standards typically use PSI or pressure classes (150, 300, 600, etc.), while European EN standards use Bar. Always match the unit to your project specifications.

What is kPa?

kPa (kilopascal) is a metric unit equal to 1,000 Pascals. It's commonly used in scientific and engineering applications. 1 Bar = 100 kPa, and 1 PSI ≤ 6.895 kPa.

How accurate is this converter?

This converter uses standard conversion factors and provides results accurate to 4 decimal places. For critical engineering calculations, always verify with official standards and specifications.

Disclaimer: This calculator provides engineering estimates for reference purposes. Actual product selection should be based on official specifications and engineering standards. Consult with a qualified engineer for critical applications.