Pressure Converter
Convert between any pressure units instantly. Our free pressure converter handles PSI, bar, pascal, atmosphere, torr, and more. Real-time conversions with high precision for automotive, HVAC, diving, and scientific applications.
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Reference Points
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How to Use
- 1 Enter a pressure value in the input field at the top of the converter.
- 2 Select your input unit from the dropdown menu (PSI, bar, pascal, atmosphere, etc.).
- 3 Choose your target unit from the second dropdown to see the converted value instantly.
- 4 View all conversions in the reference table below showing your pressure value in all supported units.
- 5 Use reference points - Click on common pressures (sea level, tire pressure, scuba tank) to see instant conversions in all units.
Pro Tip: Use the reference points to learn common pressure values — from tire pressure to scuba diving depths. Perfect for mechanics, engineers, and divers!
Frequently Asked Questions
What is PSI and when is it used?
PSI (pounds per square inch) is the most common pressure unit in the US. It's used for tire pressure, hydraulics, and compressed air. Most car tires are inflated to 30-35 PSI.
What's the difference between bar and atmosphere?
One atmosphere (atm) is the average air pressure at sea level (14.7 PSI). One bar is slightly less (14.5 PSI) and is commonly used in Europe and for weather reports. 1 atm = 1.01325 bar.
What is pascal used for?
Pascal (Pa) is the SI unit of pressure (1 Pa = 1 N/m²). It's a very small unit, so kilopascals (kPa) and megapascals (MPa) are more common. 1 bar = 100,000 Pa = 100 kPa.
What is gauge vs absolute pressure?
Gauge pressure (PSIG) measures pressure relative to atmospheric pressure. Absolute pressure (PSIA) includes atmospheric pressure. Most tire gauges show gauge pressure. Absolute pressure = Gauge pressure + Atmospheric pressure (14.7 PSI at sea level).