Convert Hectopascals to Atmospheres

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

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1 hPa = 0.000987 atm

How to Convert Hectopascals to Atmospheres

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

To convert a hectopascal measurement to a atmosphere measurement, multiply the pressure by the conversion ratio. One hectopascal is equal to 0.000987 atmospheres, so use this simple formula to convert:

atmospheres = hectopascals × 0.000987

The pressure in atmospheres is equal to the hectopascals multiplied by 0.000987.

For example, here's how to convert 5 hectopascals to atmospheres using the formula above.
5 hPa = (5 × 0.000987) = 0.004935 atm

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

Hectopascals

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.

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.

Hectopascal Measurements and Equivalent Atmosphere Conversions

Common hectopascal values converted to the equivalent atmosphere value
Hectopascals Atmospheres
1 hPa 0.000987 atm
2 hPa 0.001974 atm
3 hPa 0.002961 atm
4 hPa 0.003948 atm
5 hPa 0.004935 atm
6 hPa 0.005922 atm
7 hPa 0.006908 atm
8 hPa 0.007895 atm
9 hPa 0.008882 atm
10 hPa 0.009869 atm
11 hPa 0.010856 atm
12 hPa 0.011843 atm
13 hPa 0.01283 atm
14 hPa 0.013817 atm
15 hPa 0.014804 atm
16 hPa 0.015791 atm
17 hPa 0.016778 atm
18 hPa 0.017765 atm
19 hPa 0.018752 atm
20 hPa 0.019738 atm
21 hPa 0.020725 atm
22 hPa 0.021712 atm
23 hPa 0.022699 atm
24 hPa 0.023686 atm
25 hPa 0.024673 atm
26 hPa 0.02566 atm
27 hPa 0.026647 atm
28 hPa 0.027634 atm
29 hPa 0.028621 atm
30 hPa 0.029608 atm
31 hPa 0.030595 atm
32 hPa 0.031582 atm
33 hPa 0.032568 atm
34 hPa 0.033555 atm
35 hPa 0.034542 atm
36 hPa 0.035529 atm
37 hPa 0.036516 atm
38 hPa 0.037503 atm
39 hPa 0.03849 atm
40 hPa 0.039477 atm

More Hectopascal Pressure Conversions

Convert to Pascals
1 hPa is equal to 100 pascals
Convert to Bars
1 hPa is equal to 0.001 bars
Convert to Millibars
1 hPa is equal to 1 millibars
Convert to Kilograms Per Square Centimeter
1 hPa is equal to 0.00102 kilograms per square centimeter
Convert to Kilograms Per Square Meter
1 hPa is equal to 10.197162 kilograms per square meter
Convert to Pounds Per Square Inch
1 hPa is equal to 0.014504 pounds per square inch
Convert to Pounds Per Square Foot
1 hPa is equal to 2.088546 pounds per square foot
Convert to Torr
1 hPa is equal to 0.750062 torr