Convert between kPa, psi, bar, atm, Torr, and mbar. Input never leaves your device — everything runs locally in your browser.
Content reviewed October 2026 · About Toolzum
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Kilopascals (kPa), pounds per square inch (psi), bar, atmosphere (atm), Torr (mmHg), and millibar (mbar). All conversions are bidirectional.
kPa: SI standard, meteorology. psi: tire pressure, US hydraulics. bar: industrial, European. atm: chemistry. Torr: vacuum systems. mbar: weather.
1 atm = 101.325 kPa = 14.696 psi = 1.01325 bar = 760 Torr = 1013.25 mbar. These are exact SI definitions.
The converter uses absolute pressure by default. For gauge pressure, add atmospheric pressure (101.325 kPa) before converting.
Yes. All calculations run in your browser. No data is transmitted.
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