Pressure Converter | Convert Pa, kPa, bar, psi, atm, mmHg, inHg
Free online pressure converter. Convert between pascals, kilopascals, bar, psi, atmospheres, mmHg, inHg and more. Accurate pressure measurement conversion tool.
Free Online Pressure Converter
Our pressure converter tool allows you to instantly convert between different units of pressure measurement. Whether you need to convert PSI to bar for tire pressure, kPa to atm for scientific calculations, or mmHg to inHg for weather readings, our tool provides accurate results in real-time.
Supported Pressure Units
SI Units
- Pascal (Pa) Base SI unit
- Kilopascal (kPa) 1000 pascals
- Megapascal (MPa) 1,000,000 pascals
- Hectopascal (hPa) 100 pascals
Metric Units
- Bar 100,000 pascals
- Millibar (mbar) 0.001 bar
- Torr 1/760 of atmosphere
- mm of Mercury (mmHg) 133.322 pascals
Imperial & Other
- Pound per Sq Inch (PSI) 6,894.76 pascals
- Kilopound per Sq Inch (KSI) 1,000 PSI
- Atmosphere (atm) 101,325 pascals
- Inch of Mercury (inHg) 3,386.39 pascals
How to Use the Pressure Converter
- Enter the value - Type the number you want to convert in the "Convert From" field
- Select "From" unit - Choose the unit you're converting from (e.g., PSI)
- Select "To" unit - Choose the unit you want to convert to (e.g., bar)
- Get instant results - The converted value appears automatically
- Use quick values - Click on common values like "1 atm" or "100 kPa" for quick conversion
Common Pressure Conversion Examples
| Conversion | Formula | Example |
|---|---|---|
| PSI to Bar | PSI × 0.0689476 = bar | 30 PSI = 2.06843 bar |
| Bar to PSI | bar × 14.5038 = PSI | 2 bar = 29.0075 PSI |
| kPa to PSI | kPa × 0.145038 = PSI | 200 kPa = 29.0075 PSI |
| Atm to kPa | atm × 101.325 = kPa | 1 atm = 101.325 kPa |
| mmHg to kPa | mmHg × 0.133322 = kPa | 760 mmHg = 101.325 kPa |
Practical Applications
🚗 Automotive & Tire Pressure
Convert between PSI, bar, and kPa for checking and adjusting tire pressure in vehicles.
⚕️ Medical & Healthcare
Convert blood pressure measurements between mmHg and kPa for medical equipment calibration.
🌤️ Weather & Meteorology
Convert atmospheric pressure between hPa, inHg, and bar for weather forecasting and analysis.
🏭 Industrial & Engineering
Convert between MPa, PSI, and bar for hydraulic systems, pneumatic tools, and structural calculations.
Pressure Measurement Systems
SI Units (International System)
The Pascal (Pa) is the SI unit of pressure. It's defined as one newton per square meter. Larger units like kilopascal (kPa) and megapascal (MPa) are used for practical measurements.
- Used in scientific research worldwide
- Standard for engineering calculations
- Base unit: Pascal (1 Pa = 1 N/m²)
- Common multiples: kPa (1,000 Pa), MPa (1,000,000 Pa)
Metric System
The bar is a metric unit of pressure, but not part of the SI system. It's equal to 100,000 pascals and is commonly used in meteorology and industry.
- Bar = 100,000 pascals
- Common in European countries
- Used for weather pressure (millibar)
- Used for scuba diving and compressed air
Imperial System
PSI (pounds per square inch) is the primary imperial unit of pressure. It's widely used in the United States for tire pressure, hydraulic systems, and industrial applications.
- PSI = pounds per square inch
- Common in the United States
- Used for tire pressure and plumbing
- KSI = 1,000 PSI (for high pressures)
💡 Pressure Conversion Tips
- Quick PSI to bar: Divide PSI by 14.5 to get bar
- Quick bar to PSI: Multiply bar by 14.5 to get PSI
- Quick atm to kPa: Multiply atm by 101 to get kPa
- Quick kPa to PSI: Divide kPa by 6.9 to get PSI
- Standard atmosphere: 1 atm = 101.325 kPa = 14.696 PSI = 760 mmHg
- For precise calculations, always use our converter tool
Start Converting Now!
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