Atmospheric Pressure to PSI Calculator
| Unit | Value |
|---|
Atmospheric Pressure Information
Standard atmospheric pressure at sea level: 101,325 Pa or 14.6959 psi
Atmospheric pressure decreases with altitude at approximately 1 kPa per 100 meters.
Typical pressure range at sea level: 95,000 Pa to 105,000 Pa
Here’s a comprehensive table with all the essential information about converting atmospheric pressure to PSI (pounds per square inch):
| Pressure Unit | Equivalent in PSI | Notes |
|---|---|---|
| 1 atmosphere (atm) | 14.6959 PSI | Standard atmospheric pressure at sea level |
| 1 bar | 14.5038 PSI | Commonly used in meteorology |
| 1 pascal (Pa) | 0.000145038 PSI | SI unit of pressure |
| 1 hectopascal (hPa) | 0.0145038 PSI | 1 hPa = 100 Pa, used in weather reports |
| 1 kilopascal (kPa) | 0.145038 PSI | 1 kPa = 1000 Pa |
| 1 millimeter of mercury (mmHg) | 0.0193368 PSI | Traditional unit, still used in medicine |
| 1 inch of mercury (inHg) | 0.49115 PSI | Used in aviation and weather reporting in the US |
| 1 torr | 0.0193368 PSI | 1 torr ≈ 1 mmHg |
Key Conversion Factors:
- 1 PSI = 6894.75729 Pa
- 1 PSI = 68.9475729 hPa
- 1 PSI = 6.89475729 kPa
- 1 PSI = 0.068947573 bar
- 1 PSI = 0.068045964 atm
- 1 PSI = 51.7149326 mmHg
- 1 PSI = 2.03602374 inHg
Important Points:
- Standard atmospheric pressure at sea level: 14.6959 PSI (1 atm)
- Typical range of atmospheric pressure at sea level: 13.7 to 15.2 PSI
- Atmospheric pressure decreases with altitude:
- At 5,000 feet (1,524 m): about 12.2 PSI
- At 10,000 feet (3,048 m): about 10.1 PSI
- Pressure can vary due to weather conditions:
- High-pressure systems: typically above 14.7 PSI
- Low-pressure systems: typically below 14.7 PSI
- In meteorology, pressure is often reported in hectopascals (hPa) or millibars (mbar):
- 1013.25 hPa = 1013.25 mbar = 14.6959 PSI (standard atmospheric pressure)
Practical Applications:
- Weather forecasting: Changes in atmospheric pressure can indicate weather patterns
- Aviation: Altimeters are calibrated based on atmospheric pressure
- Scuba diving: Understanding pressure changes is crucial for safety
- Tire pressure: Often measured in PSI
- Industrial processes: Many involve pressure measurements and conversions
This table and additional information provide a comprehensive overview of the relationship between atmospheric pressure and PSI, including key conversion factors and practical applications. It covers the most common pressure units and their equivalents in PSI, which is essential for various fields including meteorology, aviation, and engineering.