压力转换器
为HVAC、汽车和工程应用在PSI、巴、帕斯卡等压力单位之间转换。
Pascal to PSI
1 Pascal = 0.000145 PSI
SI to Imperial conversion
PSI to Pascal
1 PSI = 6,895 Pascal
Imperial to SI conversion
Bar to PSI
1 Bar = 14.504 PSI
Metric to Imperial
Atmosphere to Pascal
1 atm = 101,325 Pascal
Standard atmospheric pressure
PSI to kPa
1 PSI = 6.895 kPa
Common engineering conversion
mmHg to Pascal
1 mmHg = 133.322 Pascal
Medical pressure unit
Understanding Pressure Measurement
Pressure measures the force applied per unit area, representing how much force is distributed over a surface. Critical for HVAC systems, automotive engineering, medical equipment, weather forecasting, and industrial processes, pressure conversions ensure accuracy in system design, safety compliance, and performance optimization.
Fundamental Concepts
- • Absolute Pressure: Measured relative to perfect vacuum
- • Gauge Pressure: Measured relative to atmospheric pressure
- • Differential Pressure: Difference between two pressure points
- • Static Pressure: Pressure in a fluid at rest
- • Dynamic Pressure: Pressure due to fluid motion
Measurement Principles
- • Force per unit area (F/A)
- • Pascal's principle application
- • Hydrostatic pressure calculations
- • Atmospheric pressure variations
- • Temperature compensation factors
Essential Conversion Factors
Base Conversions
- 1 Pascal = 1 N/m² = 0.000145 PSI
- 1 PSI = 6,895 Pascal = 0.0689 Bar
- 1 Bar = 100,000 Pascal = 14.504 PSI
- 1 Atmosphere = 101,325 Pascal = 14.696 PSI
- 1 mmHg = 133.322 Pascal = 0.01934 PSI
- 1 Torr = 133.322 Pascal = 1 mmHg
Quick Reference
- 1 kPa = 1,000 Pascal = 0.145 PSI
- 1 MPa = 1,000,000 Pascal = 145 PSI
- 1 inHg = 3,386 Pascal = 0.491 PSI
- 1 inH₂O = 249 Pascal = 0.036 PSI
- 1 mbar = 100 Pascal = 0.0145 PSI
- 1 kgf/cm² = 98,067 Pascal = 14.22 PSI
International Pressure Standards
SI System (International)
Pascal (Pa), kilopascal (kPa), megapascal (MPa) - Used worldwide for scientific and engineering applications
Imperial System (US/UK)
PSI (pounds per square inch), PSF (pounds per square foot) - Common in US industrial applications
Metric System
Bar, millibar, atmosphere - Widely used in European industrial and automotive applications
Specialized Units
mmHg (medical), inHg (weather), Torr (vacuum) - Industry-specific measurement standards
Professional Applications
HVAC Systems
Ductwork pressure calculations, system balancing, equipment sizing, fan performance curves, and air flow optimization for commercial and residential buildings.
Automotive Engineering
Tire pressure monitoring, engine compression testing, hydraulic system design, brake system analysis, and fuel injection pressure calculations.
Medical Equipment
Blood pressure monitoring, respiratory equipment calibration, medical gas delivery systems, and ventilator pressure settings for patient care.
Weather Forecasting
Atmospheric pressure readings, barometric measurements, storm tracking, weather pattern analysis, and meteorological research applications.
Industrial Processes
Steam systems, compressed air networks, hydraulic machinery, process control systems, and manufacturing equipment operation.
Aerospace Engineering
Cabin pressure control, fuel system design, pneumatic controls, altitude compensation, and spacecraft environmental systems.
Common Pressure Values and Examples
Everyday Pressures
- Atmospheric pressure at sea level: 101.325 kPa (14.696 PSI)
- Car tire pressure: 200-250 kPa (30-35 PSI)
- Blood pressure (normal): 16 kPa (120 mmHg systolic)
- Bicycle tire pressure: 400-800 kPa (60-120 PSI)
- Vacuum cleaner suction: -70 kPa (-10 PSI)
- Espresso machine: 900 kPa (130 PSI)
Industrial & Scientific
- Steam boiler: 1-10 MPa (145-1450 PSI)
- Compressed air systems: 600-900 kPa (90-130 PSI)
- Hydraulic systems: 10-35 MPa (1500-5000 PSI)
- Scuba tank: 20 MPa (3000 PSI)
- Deep ocean (11 km): 110 MPa (16,000 PSI)
- High-pressure research: 100+ GPa (15+ million PSI)
Pressure Safety and Standards
Safety Standards
- ASME Boiler Code: Pressure vessel design and construction standards
- OSHA Regulations: Compressed air safety limits and workplace protection
- Medical Standards: Blood pressure measurement protocols and equipment
- Automotive Standards: Tire pressure monitoring system requirements
- Aviation Standards: Cabin pressure and oxygen system regulations
Critical Safety Factors
- • Pressure relief valve settings and testing
- • Maximum allowable working pressure (MAWP)
- • Pressure testing and inspection schedules
- • Emergency shutdown procedures
- • Personal protective equipment requirements
- • Training and certification for operators
Our pressure converter provides professional-grade precision for any application, from everyday tire pressure checks to complex industrial system design and scientific research calculations. With comprehensive unit support and accurate conversion factors, it's the trusted tool for engineers, technicians, and professionals worldwide.
PSI to Bar Conversion Chart
Reference table for converting PSI to bar with common applications.
| PSI | Bar | Common Application |
|---|---|---|
| 1 | 0.069 | Very low pressure |
| 5 | 0.345 | Low-pressure testing |
| 10 | 0.689 | Residential water supply |
| 14.7 | 1.013 | 1 atmosphere (sea level) |
| 15 | 1.034 | Low-pressure steam |
| 20 | 1.379 | Bicycle tire (road, minimum) |
| 25 | 1.724 | Water distribution |
| 30 | 2.068 | Car tire (economy car) |
| 32 | 2.206 | Standard car tire pressure |
| 35 | 2.413 | Car tire (sedan) |
| 40 | 2.758 | SUV / truck tire |
| 44 | 3.034 | Heavy-load vehicle tire |
| 50 | 3.447 | Industrial air tools |
| 60 | 4.137 | Fire hose / air compressor |
| 80 | 5.516 | Scuba tank regulator |
| 100 | 6.895 | Industrial hydraulics |
| 120 | 8.274 | Pneumatic systems |
| 150 | 10.342 | High-pressure systems |
| 200 | 13.790 | Hydraulic presses |
| 300 | 20.684 | Heavy industrial equipment |
| 500 | 34.474 | Waterjet cutting |
| 3000 | 206.843 | Scuba tank (full) |
Conversion factor: 1 PSI = 0.0689476 bar. 1 bar = 14.5038 PSI.