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Pressure Converter — Free Online Tool
A tyre gauge may read PSI while a car manual lists bar, a weather report quotes hectopascals and a physics textbook uses atmospheres. This pressure converter sits between them. Choose a value, pick the unit it is in and the unit you want, and the answer appears instantly using accurate factors: one bar equals 100,000 pascals, one atmosphere equals 101,325 pascals, one PSI is about 6,894.76 pascals and one torr is about 133.322 pascals. The default setup converts bar to PSI, which is the most common request for drivers checking tyre inflation, since 2.2 bar is roughly 32 PSI. Mechanics, cyclists, pressure-cooker users, aquarium and compressor owners, HVAC technicians and students all meet these units. Remember that tyre and gauge readings are normally gauge pressure, which ignores atmospheric pressure, whereas some scientific values are absolute pressure, so the same number can mean different things; this converter changes units only and does not switch between gauge and absolute. Always follow the pressure printed on your vehicle's door placard or the equipment manual rather than a generic number. For safety-critical work, check conversions with a certified instrument. The calculations run in your browser with no sign-up and no stored data.
Use our Pressure Converter on AllConvertor — no registration, no download, works on iPhone, Android, Windows, and Mac. All processing runs in your browser when possible for maximum privacy and speed.
How to use Pressure Converter
- Type the pressure value you need to convert.
- Choose the starting unit, such as bar.
- Choose the unit you want, such as PSI.
- Read the converted pressure shown below.
Key benefits
- ✓ 100% free — no paywall or trial limits
- ✓ No account or email required
- ✓ Mobile-friendly responsive design
- ✓ Instant results in your browser
- ✓ Secure — data stays on your device
- ✓ Trusted by thousands of users daily
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Frequently Asked Questions
How do I convert bar to PSI?
Multiply bar by 14.5038. For instance, 2.2 bar is about 31.9 PSI.
How many pascals are in one atmosphere?
One standard atmosphere equals 101,325 pascals, which is about 1.013 bar or 14.7 PSI.
What is the correct tyre pressure for my car?
Use the value printed on the door-jamb placard or in the owner's manual. The converter helps you read that value in the unit shown on your pump or gauge.
What is the difference between gauge and absolute pressure?
Gauge pressure is measured relative to the surrounding air, while absolute pressure is measured from a perfect vacuum. This tool changes units only, not the reference type.
Which pressure units are available?
Pascal, bar, PSI, atmosphere and torr, which you can convert between in any direction.