# Atmospheres to Hectopascals Converter

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

Results in Hectopascals: 1 atm = 1,013.25 hPa

Do you want to convert hectopascals to atmospheres?

## How to Convert Atmospheres to Hectopascals

To convert a measurement in atmospheres to a measurement in hectopascals, multiply the pressure by the following conversion ratio: 1,013.25 hectopascals/atmosphere.

Since one atmosphere is equal to 1,013.25 hectopascals, you can use this simple formula to convert:

hectopascals = atmospheres × 1,013.25

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

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

## What Is an Atmosphere?

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.

## What Is a Hectopascal?

The hectopascal is equal to 100 pascals, which are defined as the pressure of one newton per square meter. The hectopascal is the internationally adopted unit used to measure atmospheric pressure.

The hectopascal is a multiple of the pascal, which is the SI derived unit for pressure. In the metric system, "hecto" is the prefix for 102. Hectopascals can be abbreviated as hPa; for example, 1 hectopascal can be written as 1 hPa.

## Atmosphere to Hectopascal Conversion Table

Table showing various atmosphere measurements converted to hectopascals.
Atmospheres Hectopascals
0.001 atm 1.0133 hPa
0.002 atm 2.0265 hPa
0.003 atm 3.0398 hPa
0.004 atm 4.053 hPa
0.005 atm 5.0663 hPa
0.006 atm 6.0795 hPa
0.007 atm 7.0928 hPa
0.008 atm 8.106 hPa
0.009 atm 9.1193 hPa
0.01 atm 10.13 hPa
0.02 atm 20.27 hPa
0.03 atm 30.4 hPa
0.04 atm 40.53 hPa
0.05 atm 50.66 hPa
0.06 atm 60.8 hPa
0.07 atm 70.93 hPa
0.08 atm 81.06 hPa
0.09 atm 91.19 hPa
0.1 atm 101.33 hPa
0.2 atm 202.65 hPa
0.3 atm 303.98 hPa
0.4 atm 405.3 hPa
0.5 atm 506.63 hPa
0.6 atm 607.95 hPa
0.7 atm 709.28 hPa
0.8 atm 810.6 hPa
0.9 atm 911.93 hPa
1 atm 1,013 hPa