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NBC Action Weather Plus Calculators
Have you ever wondered how relative humidity affects how hot it really feels outside? Confused about what the dew point really is? You can learn all about these and other weather terms with our interactive NBC Action Weather Plus Calculators below.

Barometric Pressure Conversions
(Enter a unit; click Convert for the other two.)
Millibars:   mb
Inches:   " mercury
Millimeters:   mm
   

Related weather definitions from NBC Action Weather Plus:

 • barometer – a device used to measure the atmosphere's barometric pressure at a given altitude.
 • barometric pressure – the weight of the air above a given location from the surface of the earth to the top of the atmosphere.

NBC Action Weather Plus Calculators:
 • Barometric Pressure Conversions
 • Cloud Base Calculator
 • Density Altitude Calculator
 • Dew Point Calculator
 • Fahrenheit / Celsius Conversion
 • Heat Index Calculator 1
 • Heat Index Calculator 2
 • Relative Humidity Calculator
 • Relative Humidity / Dew Point Calculator
 • Wind Chill Calculator
 • Wind Velocity

Learn more weather terminology here.

Current Conditions
39°
Clear
High 58° Low 43°
Feels like 35°
Barometer 30.11 in.
Humidity 95%
Visibility 6 Miles
Dewpoint 38°
Wind SE 6 mph
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