Pressure Converter
Just pick a value and unit to convert across the major pressure units at once: Pa, kPa, MPa, hPa, bar, atm, mmHg, psi, kgf/cm² and meters of water. Handy for weather, plumbing, tire pressure and more.
Input
Input unit
atm（Atmosphere (standard)）
Result
1 atm converted to pascals
101,325Pa
| Unit | Name | Converted value |
|---|---|---|
| Pa | Pascal | 101,325 |
| hPa | Hectopascal | 1,013.25 |
| kPa | Kilopascal | 101.325 |
| MPa | Megapascal | 0.101325 |
| bar | Bar | 1.01325 |
| atm | Atmosphere (standard) | 1 |
| mmHg | Millimeter of mercury (Torr) | 760.0021 |
| psi | Pounds per square inch | 14.695949 |
| kgf/cm² | Kilogram-force per square centimeter | 1.033227 |
| mH₂O | Meter of water column | 10.332275 |
How it works
- Supports 10 units: pascal (Pa), hectopascal (hPa), kilopascal (kPa), megapascal (MPa), bar, atmosphere (atm), millimeter of mercury (mmHg/Torr), psi (pounds per square inch), kgf/cm² and meter of water column (mH₂O).
- Pascal (Pa) is the conversion base. Your input is first normalized to pascals and then converted to every other unit, so you can convert between any units regardless of the one you start from.
- Enter a number and choose the source unit, and the conversions to all supported units are listed in a table. The pascal (Pa) value is shown large at the top as the representative figure.
- The key reference values used are 1 bar = 100,000 Pa, 1 atm = 101,325 Pa, 1 mmHg = 133.322 Pa, 1 psi = 6,894.757 Pa and 1 kgf/cm² = 98,066.5 Pa.
- Extremely large or small magnitudes are shown in exponential notation; otherwise trailing decimal digits are trimmed for readability.
- Displayed values are rounded approximations. For precise measurement, design or trade, follow the relevant standards and significant-figure rules.
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Pressure Converter