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Pressure Converter: PSI, Atmospheres, mmHg & More

Convert tire, weather, and engineering pressure readings between psi, standard atmospheres, millimeters of mercury, pascals, kilopascals, and bar.

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Conversions use standard unit definitions. Results use the selected number of decimal places; some exact conversions produce repeating decimals.

PSI to kilopascals

One pound per square inch equals about 6.894757 kilopascals.

Pounds per square inch (psi)Kilopascals (kPa)
16.89476
14.696101.325
30206.84272
32220.63223
100689.47573

Atmospheres to millimeters of mercury

One standard atmosphere (atm) is approximately 760 mmHg. The calculator uses standard atmosphere and conventional millimeters of mercury.

Atmospheres (atm)Millimeters of mercury (mmHg), approx.
0.5380
1760
21,520
32,280

Standard atmospheric pressure is 101.325 kPa, about 14.6959 psi or 1.01325 bar. Actual weather and elevation conditions vary.

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