Pressure Converter
Convert between psi, bar, pascal, atmosphere, mmHg, and torr instantly.
Conversions run instantly in your browser — nothing is uploaded or stored.
About This Pressure Converter
Pressure is force applied over an area. This tool switches between seven units used across automotive, industrial, scientific, and weather contexts: pascal, kilopascal, bar, atmosphere, psi, mmHg, and torr. It's commonly used to check tire pressure specifications against a different unit system, match hydraulic or pneumatic equipment ratings, read barometric weather data, or convert scientific and medical pressure measurements.
Frequently Asked Questions
How many psi are in a bar?
One bar equals 14.5038 psi. To convert psi to bar, divide by 14.5038; to convert bar to psi, multiply by 14.5038.
What is a normal car tire pressure in psi and bar?
Most passenger car tires run between 30 and 35 psi, which is roughly 2.1 to 2.4 bar. Always check the pressure listed on the driver's door jamb or owner's manual rather than the tire sidewall, which shows the maximum rating, not the recommended one.
What is standard atmospheric pressure in pascals, bar, and psi?
Standard atmospheric pressure is 101,325 pascals, which equals 1.01325 bar or 14.696 psi. This is the reference value used to define one atmosphere (atm).
What's the difference between mmHg and torr?
They're nearly identical. One torr is defined as 1/760 of an atmosphere, which differs from 1 mmHg by less than 0.001%. Both are included as separate options since each is standard in different fields.
Why is bar still used if it's not an SI unit?
Bar isn't part of the International System of Units, but it remains common because it's close to average atmospheric pressure at sea level and simple to work with (1 bar = 100,000 pascals exactly). Meteorologists often use the related millibar for the same reason.
Is mmHg the same unit used for blood pressure readings?
Yes, blood pressure is conventionally read in millimeters of mercury (mmHg). This converter can translate mmHg to other pressure units, but it isn't a substitute for a calibrated blood pressure monitor or medical advice.
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