Barometric Pressure Converter
Convert atmospheric pressure units for weather forecasting and scientific applications
Atmospheric Pressure Converter
Enter the barometric pressure value to convert
Most common weather unit
Complete Pressure Conversions
Standard Units
Weather Units
Engineering Units
Reference: Standard atmospheric pressure = 1 ATM = 1013.25 hPa = 760 mmHg
Weather note: hPa (hectopascals) are commonly used in meteorology
Common Pressure Conversions
| ATM | Bar | hPa | mmHg | Description |
|---|---|---|---|---|
| 1 | 1.01325 | 1013.25 | 760 | Standard Atmosphere |
| 0.5 | 0.507 | 506.6 | 380 | Half Standard Pressure |
| 1.5 | 1.52 | 1520 | 1140 | 1.5x Standard Pressure |
| 2 | 2.027 | 2026.5 | 1520 | Double Standard Pressure |
Weather Pressure Examples
Standard Atmospheric Pressure
Pressure: 1 ATM
Equivalent: 1013.3 hPa
Context: Sea level reference
Hurricane (Category 5)
Pressure: 0.94 ATM
Equivalent: 952.5 hPa
Context: Extremely low pressure
Strong High Pressure
Pressure: 1.04 ATM
Equivalent: 1053.8 hPa
Context: Clear, stable weather
Typical Low Pressure
Pressure: 0.99 ATM
Equivalent: 1003.1 hPa
Context: Cloudy, stormy conditions
Aircraft Cabin Pressure
Pressure: 0.75 ATM
Equivalent: 759.9 hPa
Context: Commercial aviation
Denver, Colorado
Pressure: 0.83 ATM
Equivalent: 841.0 hPa
Context: High altitude city
Key Conversion Factors
1 ATM = 1013.25 hPa
Weather standard
1 ATM = 760 mmHg
Mercury barometer
1 ATM = 29.92 inHg
US weather reports
1 ATM = 14.696 PSI
Engineering standard
Weather Pressure Guide
Low Pressure (< 1010 hPa)
Typically associated with storms, rain, and unsettled weather conditions.
Normal Pressure (1010-1020 hPa)
Average atmospheric conditions with variable weather patterns.
High Pressure (> 1020 hPa)
Usually brings clear skies, calm conditions, and stable weather.
Applications
Weather forecasting and meteorology
Aviation altitude calculations
Medical equipment calibration
Industrial process monitoring
Scientific research
HVAC system design
Understanding Barometric Pressure
What is Barometric Pressure?
Barometric pressure, also known as atmospheric pressure, is the force exerted by the weight of air in the Earth's atmosphere. It's measured using a barometer and varies with altitude, temperature, and weather conditions.
Why Different Units?
- •hPa/mbar: Standard for weather reports
- •mmHg: Medical and scientific applications
- •inHg: Common in US weather reports
- •PSI: Engineering and industrial use
Pressure and Weather
Changes in barometric pressure are strong indicators of weather patterns. Meteorologists use pressure measurements to predict storms, fair weather, and other atmospheric conditions.
Pressure Trends
- Falling pressure: Approaching storm or bad weather
- Rising pressure: Clearing weather, fair conditions
- Steady pressure: Stable weather conditions
- Rapid changes: Significant weather events likely
Altitude Effect: Atmospheric pressure decreases by about 12 hPa per 100 meters of elevation gain.