Standard Atmosphere to PSI Converter 2026 - atm to psi Calculator | Thiyagi

Standard Atmosphere to PSI Converter

Convert between standard atmosphere and pounds per square inch instantly

1 atm = 14.696 psi
1 psi = 0.068046 atm
Enter a value to see the conversion result

Pressure at Different Altitudes

Location/Altitude atm psi
Sea Level 1.000 14.696
1,000 ft 0.964 14.175
5,000 ft (Denver) 0.832 12.230
10,000 ft 0.688 10.110
20,000 ft 0.460 6.760
Commercial Flight 0.230 3.380

Pressure Comparisons

Weather Systems:
• High pressure: 1.02-1.05 atm (15.0-15.4 psi)
• Normal: 1.00 atm (14.7 psi)
• Low pressure: 0.95-0.98 atm (14.0-14.4 psi)
• Hurricane eye: 0.90 atm (13.2 psi)
Technical Applications:
• Vacuum pump: 0.1-0.8 atm
• Car tire: 2.0-2.5 atm (30-37 psi)
• Scuba tank: 200 atm (2,940 psi)
• Pressure cooker: 1.7 atm (25 psi)
Industrial Uses:
• Steam boiler: 10-20 atm
• Hydraulic system: 100-300 atm
• High-pressure cleaning: 100-1000 atm
• Diamond synthesis: 50,000+ atm

Unit Definitions

  • Standard Atmosphere: 101,325 Pa exactly
  • PSI: Pounds per square inch
  • Conversion: 1 atm = 14.696 psi
  • Reference: Sea level at 15°C

Applications

  • Meteorology and weather
  • Aviation and aerospace
  • Scuba diving calculations
  • Industrial pressure systems
  • Scientific research

Global Standards

  • Atmosphere: International scientific standard
  • PSI: Common in US engineering
  • Aviation: Uses inches of mercury
  • Meteorology: Uses millibars/hectopascals