# Hectopascals to Atmospheres Conversion

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

**Results in Atmospheres:**

## How to Convert Hectopascals to Atmospheres

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

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

**For example,**here's how to convert 5,000 hectopascals to atmospheres using the formula above.

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 10^{2}. 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 to Atmosphere Conversion Table

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 |

20 hPa | 0.019738 atm |

30 hPa | 0.029608 atm |

40 hPa | 0.039477 atm |

50 hPa | 0.049346 atm |

60 hPa | 0.059215 atm |

70 hPa | 0.069085 atm |

80 hPa | 0.078954 atm |

90 hPa | 0.088823 atm |

100 hPa | 0.098692 atm |

200 hPa | 0.197385 atm |

300 hPa | 0.296077 atm |

400 hPa | 0.394769 atm |

500 hPa | 0.493462 atm |

600 hPa | 0.592154 atm |

700 hPa | 0.690846 atm |

800 hPa | 0.789539 atm |

900 hPa | 0.888231 atm |

1,000 hPa | 0.986923 atm |

2,000 hPa | 1.9738 atm |

3,000 hPa | 2.9608 atm |

4,000 hPa | 3.9477 atm |

5,000 hPa | 4.9346 atm |

6,000 hPa | 5.9215 atm |

7,000 hPa | 6.9085 atm |

8,000 hPa | 7.8954 atm |

9,000 hPa | 8.8823 atm |

10,000 hPa | 9.8692 atm |