Pressure Converter
Convert pressure between PSI, bar, Pascal, kPa, MPa, atm, Torr, and inHg instantly.
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Frequently Asked Questions
What is standard atmospheric pressure?
Standard atmosphere (atm) is defined as 101,325 Pa (pascals), equal to 1013.25 hPa, 760 mmHg (Torr), or 14.696 psi. This is the average air pressure at sea level.
What is the difference between gauge pressure and absolute pressure?
Gauge pressure is measured relative to atmospheric pressure (e.g., tyre pressure). Absolute pressure is measured from a perfect vacuum. Absolute = Gauge + Atmospheric pressure.
When is bar vs psi used?
Bar is common in European industrial and scientific contexts. PSI (pounds per square inch) is widely used in the US for tyres, hydraulics, and HVAC. 1 bar ≈ 14.504 psi.