Trying to convert units of pressure from atmospheres to millibars? Try out our accurate atm to mbar pressure converter with many more converters available!

To measure atmospheric pressure, both **millibars** and **atmospheres** are popular units of pressure to use. Measuring pressure at sea level is more commonly done in millibars rather than atmospheres, however recently the hectopascal is being introduced. They can be used in several different fields, such as meteorology and science or more commercial uses like weather forecasts. Try this** atmospheres to millibars converter** or any of our other pressure converters.

## How to use the Converter for Atmospheres to Millibars?

To use this **atmosphere to millibar calculator**, input a quantity of atmospheres into the box above and click “convert” to be given an accurate equivalent in millibars. For the opposite calculation, **convert millibars to atmospheres**.

## Formula to Convert atm – mbar

In mathematical terms, to do this **atmosphere to millibar conversion** by hand you need to know the formula behind the calculation so we are providing it below. For instance, 4 atm = 4,053 mbar and 17 atm = 17,225.25 mbar

**[number of] atmospheres x 1,013.25 = [number of] millibars**

## What are atmoshperes?

**Atmospheres** measure pressure through the force of an object exerted on a surface by the weight of the air above it, or in other terms the Earth’s atmoshpere. Atmoshperic pressure is measured by the unit of atmoshpere** **by a piece of equipment called a barometer, which is commonly used in meteorology. Use our** atmosphere – millibar converter**.

## What are millibars?

Scientists use the measure of **millibars** to identify the standard atmospheric pressure at sea level to be around 1,013 millibars. As a subunit of the unit of pressure called bars, the millibar is equal to exactly one-thousandth of a bar. Millibars are used in meteorology and for weather forecasts written for the public. Try the **atm to mbar converter** for your calculations.

### How many is 1 Atmosphere in Millibars?

**1013.25 Millibars**

`(1atm = 1013.25mbar)`

### How many are 2 Atmospheres in Millibars?

**2026.5 Millibars**

`(2atm = 2026.5mbar)`

### How many are 3 Atmospheres in Millibars?

**3039.75 Millibars**

`(3atm = 3039.75mbar)`

### How many are 4 Atmospheres in Millibars?

**4053 Millibars**

`(4atm = 4053mbar)`

### How many are 5 Atmospheres in Millibars?

**5066.25 Millibars**

`(5atm = 5066.25mbar)`

### How many are 10 Atmospheres in Millibars?

**10132.5 Millibars**

`(10atm = 10132.5mbar)`

### How many are 15 Atmospheres in Millibars?

**15198.75 Millibars**

`(15atm = 15198.75mbar)`

### How many are 20 Atmospheres in Millibars?

**20265 Millibars**

`(20atm = 20265mbar)`

### How many are 25 Atmospheres in Millibars?

**25331.25 Millibars**

`(25atm = 25331.25mbar)`

### How many are 30 Atmospheres in Millibars?

**30397.5 Millibars**

`(30atm = 30397.5mbar)`

### How many are 50 Atmospheres in Millibars?

**50662.5 Millibars**

`(50atm = 50662.5mbar)`

### How many are 100 Atmospheres in Millibars?

**101325 Millibars**

`(100atm = 101325mbar)`

### How many are 200 Atmospheres in Millibars?

**202650 Millibars**

`(200atm = 202650mbar)`

### How many are 500 Atmospheres in Millibars?

**506625 Millibars**

`(500atm = 506625mbar)`

### How many are 1000 Atmospheres in Millibars?

**1013250 Millibars**

`(1000atm = 1013250mbar)`