One standard atmosphere
1 atm equals exactly 101,325 Pa, 101.325 kPa, 1.01325 bar, and 760 torr; it is approximately 14.6959488 psi.
Convert pressure values among SI, metric, atmospheric, and US customary units using Pascal-based definitions.
Pressure measures force applied over an area. The Pascal (Pa) is the SI unit, and every conversion in this calculator passes through Pascals.
Kilopascals and megapascals scale the Pascal, while bar, atmosphere, psi, torr, and mmHg use different conventional reference values.
Pa = kPa × 1,000Pa = bar × 100,000Pa = atm × 101,325Pa = psi × 6,894.757293168Pa = torr × (101,325 ÷ 760)Pa = mmHg × 133.3223874151 atm equals exactly 101,325 Pa, 101.325 kPa, 1.01325 bar, and 760 torr; it is approximately 14.6959488 psi.
100 psi is approximately 689.4757293168 kPa and 6.8947572932 bar.
2 bar equals 200 kPa and approximately 29.0075475 psi.
760 torr equals exactly one standard atmosphere and 101.325 kPa.
1 kPa is 1,000 Pa; 1 MPa is 1,000,000 Pa.
1 bar is 100 kPa. One millibar and one hectopascal are both 100 Pa, so their numeric values are equal.
One standard atmosphere is exactly 101.325 kPa. It is a defined unit, not a measurement of local weather conditions.
They are extremely close but not identical here: torr is exactly 1/760 atmosphere, while mmHg uses 133.322387415 Pa.
This converter changes pressure units only. It does not convert between gauge and absolute pressure because those use different reference points. For example, 0 psi gauge does not mean 0 psi absolute.
mmHg is used in medicine, but this tool does not interpret blood pressure or label values normal, high, or low.
Weather reports commonly use hPa or mbar. These units are numerically equal, but this converter does not provide forecasts or safety recommendations.
There are exactly 1,000 Pascals in one kilopascal.
One psi is approximately 6.894757293168 kPa.
One bar is approximately 14.5037738 psi.
Yes. The standard atmosphere is defined as exactly 101,325 Pa, or 101.325 kPa.
They are nearly equal but use slightly different conventional definitions in this calculator.
Both equal exactly 100 Pascals.
Negative values can be meaningful in some gauge-pressure contexts, so this unit converter accepts them without inferring a reference convention.
No. It converts units only and does not change the pressure reference.
No. It only converts pressure units and provides no medical interpretation.