PPISO TOOLS

Pressure Converter

Convert between Pascal, Bar, PSI, Atmosphere, Torr, and more pressure units instantly.

About Pressure Converter

Our Pressure Converter is a powerful online tool that allows you to convert pressure measurements between different units seamlessly. Whether you're working on engineering projects, scientific research, weather analysis, or industrial applications, this tool provides accurate conversions across all commonly used pressure units.

The tool supports conversions between Pascal (Pa), Bar, PSI (Pounds per Square Inch), Atmosphere (atm), Torr, Millimeter of Mercury (mmHg), and many other units. All conversions are calculated with high precision and displayed instantly as you type or change units.

Convert From

How to Use

1

Enter the Pressure Value

Type the numerical value of the pressure you want to convert in the "Pressure Value" field. You can enter whole numbers, decimals, or negative values (for gauge pressure below atmospheric).

2

Select the Original Unit

Choose the unit of your input value from the "From Unit" dropdown. Options include Pascal, Bar, PSI, Atmosphere, Torr, mmHg, and more.

3

Select the Target Unit

Choose the unit you want to convert to from the "To Unit" dropdown. You can also use the "Swap Units" button to quickly switch between the source and target units.

4

View Results

Click "Convert" to see the result. The tool will display the converted value, the formula used, and all possible conversions from your original value to every supported unit.

Common Conversions

Quick links to frequently used pressure conversions. Click any link to see the instant result.

1 atm to PSI
1 atmosphere → psi
1 atm to Bar
1 atmosphere → bar
1 atm to Pascal
1 atmosphere → pascal
1 bar to PSI
1 bar → psi
1 bar to Atmosphere
1 bar → atmosphere
1 bar to kPa
1 bar → kilopascal
1 PSI to Bar
1 psi → bar
1 PSI to Atmosphere
1 psi → atmosphere
14.7 PSI to atm
14.7 psi → atmosphere
101325 Pa to atm
101325 pascal → atmosphere
101325 Pa to bar
101325 pascal → bar
760 Torr to atm
760 torr → atmosphere
760 mmHg to atm
760 mmhg → atmosphere
1 atm to Torr
1 atmosphere → torr
1 atm to mmHg
1 atmosphere → mmhg
100 kPa to Bar
100 kilopascal → bar
1 kgf/cm² to PSI
1 kgf/cm² → psi
1000 mbar to Bar
1000 millibar → bar
30 inHg to mmHg
30 in mercury → mmhg
1 atm to inH₂O
1 atmosphere → inh2o

Frequently Asked Questions

What is the standard unit of pressure?

The SI unit of pressure is the Pascal (Pa), which is equal to one Newton per square meter (N/m²). For practical applications, larger units like kilopascal (kPa = 1000 Pa) or bar (1 bar = 100,000 Pa) are commonly used.

What is standard atmospheric pressure?

Standard atmospheric pressure (1 atm) is defined as exactly 101,325 Pa or 101.325 kPa. This equals 14.696 PSI, 760 mmHg, 760 Torr, or 1.01325 bar. It represents the average air pressure at sea level at 15°C (59°F).

What is the difference between PSI and bar?

PSI (Pounds per Square Inch) is commonly used in the US and UK for tire pressure, scuba tanks, and industrial applications. Bar is a metric unit widely used in Europe and scientific contexts. 1 bar equals approximately 14.5038 PSI, and they are close but not identical to atmospheric pressure.

What is the difference between Torr and mmHg?

Torr and mmHg (millimeters of Mercury) are nearly identical units. Historically, 1 mmHg was defined as the pressure exerted by a 1mm column of mercury. 1 Torr is defined as exactly 1/760 of a standard atmosphere. For most practical purposes, 1 Torr ≈ 1 mmHg (the difference is less than 0.000015%).

Is this tool free to use?

Absolutely! Our Pressure Converter is completely free to use, with no registration required. We believe in providing high-quality, accessible tools for students, engineers, scientists, and anyone who needs to perform pressure conversions quickly and accurately.