Pressure Converter
Convert pressure between pascal, kilopascal, bar, psi, atmosphere and mmHg instantly. Useful for tires, weather, diving and engineering.
Pressure reference: gauge values (such as psig or barg) are relative to local atmosphere; absolute values (psia or bara) are relative to vacuum. Converting between them requires the local atmospheric pressure, not just a unit factor.
Vehicle tires: copy the cold-pressure value from the vehicle placard and convert it here. This tool does not recommend or choose tire pressure.
All units at once
Upsizing wheels? Tire size calculator.
Convert pressure units
Convert a stated pressure value without changing whether it is gauge or absolute. Torr and mmHg at 0 °C are listed separately, and no tire-pressure recommendation is supplied.
FAQ
Which units are supported?
Pascal (Pa), kilopascal (kPa), bar, pound-force per square inch (psi), atmosphere (atm), millimetres of mercury at 0 °C (mmHg) and Torr.
How do I convert bar to psi?
1 bar ≈ 14.504 psi. Enter the value, pick the units, and the result updates instantly.
Can this choose a tire pressure?
No. Copy the cold-pressure value from the vehicle placard or manufacturer documentation, then use this tool only to convert that value.
What is the difference between gauge and absolute pressure?
Gauge pressure is measured relative to local atmospheric pressure; absolute pressure is measured relative to vacuum. Unit conversion alone does not change that reference.
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