Millibar to Atmosphere Converter

Convert Pressure Units Instantly

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Understanding Pressure Conversion

What is a Millibar (mbar)?

A millibar is a unit of atmospheric pressure equal to 0.001 bar or 100 pascals. It's commonly used in meteorology and weather forecasting. Standard atmospheric pressure at sea level is 1013.25 millibars.

What is an Atmosphere (atm)?

One atmosphere (atm) is the average pressure exerted by Earth's atmosphere at sea level. It equals 1013.25 millibars or 101,325 pascals. This unit is frequently used in chemistry and physics.

Conversion Formula

To convert millibars to atmospheres, multiply the millibar value by 0.000987:

Atmospheres = Millibars × 0.000987