Pressure Converter
Convert between pressure units including Pascal, bar, PSI, atmosphere, mmHg, and more
Use Pressure Converter
Assumptions
Use Pressure Converter for data and measurement conversion work when you need a local browser check and output you can review before using it in the next step.
Worked example
When To Use Pressure Converter
- Paste a real example into Pressure Converter that includes the edge case you need to check.
- Review whether the output matches the converted value, table, or format against the source input before using it in the next step.
Sample Input And Output Checks
- Start with a sample that includes the failure you are trying to reproduce, not only a clean placeholder.
- Review numeric precision, unit assumptions, delimiter handling, and destination format before trusting the output.
- Run one known sample through the converted output before relying on it in the next step.
About This Tool
Pressure Conversion Example
Use this converter for pascals, bar, psi, atmospheres, and related engineering or lab pressure values.
32 psi to bar
About 2.21 bar, with psi kept as the source unit.
- Confusing gauge pressure and absolute pressure in equipment notes.
- Rounding values before safety, calibration, or specification checks.
- Mixing pressure units with force or weight units.
- Use Temperature Converter when the same reading depends on temperature context.
- Use Energy Converter for adjacent physics calculations.
- Keep units and measurement conditions beside the converted result.
Local processing note: Pressure conversion is local; redact equipment IDs, facility names, or test references before sharing.
Free Online Pressure Unit Converter
Our pressure converter provides instant conversion between 10 pressure units: Pascal (Pa), kilopascal (kPa), megapascal (MPa), bar, millibar (mbar), atmosphere (atm), PSI, mmHg, inches of mercury (inHg), and torr. Essential for engineers, scientists, HVAC technicians, and meteorologists. For related conversions, explore our Temperature Converter and Energy Converter.
Technical Details: SI Pressure Units and Conversion Factors
The Pascal (Pa) is the SI unit of pressure, defined as one newton per square meter. Key conversions: 1 atm = 101,325 Pa, 1 bar = 100,000 Pa, 1 PSI = 6,894.757 Pa, 1 mmHg = 133.3224 Pa. Standard atmospheric pressure at sea level is 101.325 kPa = 1 atm = 1.01325 bar = 14.696 PSI = 760 mmHg = 29.92 inHg.
Real-World Use Cases
Pressure conversion is essential in HVAC engineering (PSI and kPa), meteorology (millibar and inHg for weather reports), medical applications (mmHg for blood pressure), automotive (tire pressure in PSI or bar), industrial processes (MPa for hydraulic systems), and scuba diving (atmospheres for depth calculations). For comprehensive unit conversion, try our Unit Converter.
Gauge Pressure vs Absolute Pressure
One reason pressure calculations go wrong is that the number is converted correctly but the pressure type is misunderstood. Tire gauges, compressor readouts, and many industrial instruments often show gauge pressure, while scientific equations and thermodynamic references may require absolute pressure. That means a converted PSI or bar value is not automatically interchangeable unless you know whether atmospheric pressure has already been included. If the source system mixes process data and ambient conditions, verify that first before you trust the converted result.
High-Frequency Pressure Conversion Searches
Common searches on this page include PSI to bar, PSI to kPa, bar to PSI, atm to kPa, and mmHg to kPa. Those pairs appear in tire pressure checks, espresso machine setup, vacuum systems, weather station exports, and engineering specifications. If the pressure value is part of a broader physical calculation, review the related temperature with our Temperature Converter or the energy assumptions with our Energy Converter.