Convert Atmospheres to Millibars

Enter the pressure in atmospheres below to get the value converted to millibars.

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1 atm = 1,013.25 mbar

How to Convert Atmospheres to Millibars

Calculators can be used to convert measurements from one unit to another

To convert a atmosphere measurement to a millibar measurement, multiply the pressure by the conversion ratio. One atmosphere is equal to 1,013.25 millibars, so use this simple formula to convert:

millibars = atmospheres × 1,013.25

The pressure in millibars is equal to the atmospheres multiplied by 1,013.25.

For example, here's how to convert 5 atmospheres to millibars using the formula above.
5 atm = (5 × 1,013.25) = 5,066.25 mbar

Atmospheres and millibars are both units used to measure pressure. Keep reading to learn more about each unit of measure.

Atmospheres

The atmosphere is a reference measure of pressure equal to 101,325 pascals or 1,013,250 dynes. The atmosphere was originally defined as the pressure of 760 millimeters of mercury at standard gravity at 0 °C, but was later redefined in 1954 to be equal to 1,013,250 dynes.

Atmospheres can be abbreviated as atm, for example 1 atmosphere can be written as 1 atm.

Millibars

One millibar is equal to one-thousandth of a bar, which is defined as the pressure of one newton per square meter. One millibar is also equal to one hectopascal.

The millibar is a non-SI metric unit for pressure. In the metric system, "milli" is the prefix for 10-3. Millibars can be abbreviated as mbar, for example 1 millibar can be written as 1 mbar.

Atmosphere Measurements and Equivalent Millibar Conversions

Common atmosphere values converted to the equivalent millibar value
Atmospheres Millibars
1 atm 1,013 mbar
2 atm 2,027 mbar
3 atm 3,040 mbar
4 atm 4,053 mbar
5 atm 5,066 mbar
6 atm 6,080 mbar
7 atm 7,093 mbar
8 atm 8,106 mbar
9 atm 9,119 mbar
10 atm 10,133 mbar
11 atm 11,146 mbar
12 atm 12,159 mbar
13 atm 13,172 mbar
14 atm 14,186 mbar
15 atm 15,199 mbar
16 atm 16,212 mbar
17 atm 17,225 mbar
18 atm 18,239 mbar
19 atm 19,252 mbar
20 atm 20,265 mbar
21 atm 21,278 mbar
22 atm 22,292 mbar
23 atm 23,305 mbar
24 atm 24,318 mbar
25 atm 25,331 mbar
26 atm 26,345 mbar
27 atm 27,358 mbar
28 atm 28,371 mbar
29 atm 29,384 mbar
30 atm 30,398 mbar
31 atm 31,411 mbar
32 atm 32,424 mbar
33 atm 33,437 mbar
34 atm 34,451 mbar
35 atm 35,464 mbar
36 atm 36,477 mbar
37 atm 37,490 mbar
38 atm 38,504 mbar
39 atm 39,517 mbar
40 atm 40,530 mbar

More Atmosphere Pressure Conversions

Convert to Pascals
1 atm is equal to 101,325 pascals
Convert to Hectopascals
1 atm is equal to 1,013.25 hectopascals
Convert to Bars
1 atm is equal to 1.01325 bars
Convert to Kilograms Per Square Centimeter
1 atm is equal to 1.033227 kilograms per square centimeter
Convert to Kilograms Per Square Meter
1 atm is equal to 10,332.3 kilograms per square meter
Convert to Pounds Per Square Inch
1 atm is equal to 14.695964 pounds per square inch
Convert to Pounds Per Square Foot
1 atm is equal to 2,116.22 pounds per square foot
Convert to Torr
1 atm is equal to 760 torr