Atmosphere to Millibar Converter

Convert atmospheric pressure units quickly and accurately

1013.25
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Understanding Pressure Conversion

What is an Atmosphere?

An atmosphere (atm) is a unit of pressure equal to the average pressure of Earth's atmosphere at sea level. One atmosphere is precisely defined as 101,325 pascals or 1013.25 millibars. This standardized unit is widely used in physics, engineering, and meteorology.

What is a Millibar?

A millibar (mbar) is a metric unit of pressure equal to 1/1000th of a bar. It's commonly used in meteorology to measure atmospheric pressure. One millibar is equivalent to 100 pascals or one hectopascal (hPa). Standard atmospheric pressure at sea level is 1013.25 millibars.

Conversion Formula

To convert from atmospheres to millibars, use the following formula:

Millibars = Atmospheres × 1013.25