Hectopascal (hPa) - Pressure Unit - Definition, Application, Conversions

What is a hectopascal (hPa)?

The hectopascal (hPa) is the SI unit of pressure measurement, equivalent to 100 pascals (Pa). With the term "hectopascal", the prefix "hecto-", meaning hundred, is combined with the unit "pascal". This is why 1 hPa = 100 Pa.

The hectopascal facilitates the measurement and recording of atmospheric pressure, which often oscillates around values of several hundred pascals.

Hectopascal is rarely used in the industrial hose sector. In an industrial context, hectopascal might be too small a unit to express working pressures. The key aspect of industrial hoses is their ability to withstand appropriate working pressures, typically expressed in kilopascals or bars.

When are hectopascals used to measure pressure?

Hectopascals are used to measure pressure in the following areas:

• Meteorology - Atmospheric pressure, which is crucial for weather forecasting and the study of climate change, is usually measured in hectopascals. They replaced millibars (mbar) as a step towards standardising measurements to the metric system. 
• Atmospheric science and climatology - In addition to meteorology, hPa are also used in broad atmospheric research, including climatology. This helps scientists to analyse and model weather systems and to study climate change. 
• Aviation - In aviation, hectopascal is used to measure atmospheric pressure, which is essential for safe flight planning and execution. Pilots and air traffic controllers use atmospheric pressure to determine aircraft altitude. 
• Other scientific and technical applications - Although the hectopascal is mainly associated with meteorology, it can also be used in other fields that require precise pressure measurements, such as oceanography and engineering.

How to measure pressure in hectopascals?

To measure pressure in hectopascals (hPa), you need a suitable manometer calibrated in this unit or a measuring device that can convert pressure to hectopascals.

Here are the steps to take:

1. Choose the right manometer - You can use a digital manometer or barometer that has a hectopascal scale.
2. Identify the measuring point - Determine where you want to measure pressure (e.g. in the atmosphere using a barometer or in industrial, hydraulic or pneumatic systems).
3. Connect the manometer - Connect the manometer to the appropriate measuring point. Make sure the connection is tight to ensure an accurate measurement.
4. Read the result - Digital manometers or barometers display the reading directly in hPa units if this is the setting. In a mechanical manometer, the reading can be read directly from the dial.

If your device measures pressure in other pressure units, you can convert it to hectopascals using the appropriate pressure converters.

Conversion of pressure unit hectopascal (hPa)

• 1 hPa = 0,001 bar
• 1 hPa = 100 Pa
• 1 hPa = 0,1 kPa
• 1 hPa = 0,0001 MPa
• 1 hPa = 0,000986923 atm
• 1 hPa = 0,0145038 PSI
• 1 hPa = 10,1971621 mmH2O
• 1 hPa = 0,401463 inH2O
• 1 hPa = 0,750062 Tr
• 1 hPa = 0,750062 mmHg
• 1 hPa = 0,02953 inHg
• 1 hPa = 2,08854 PSF
• 1 hPa = 0,00101972 at

1 hektopascal (hPa) = 0,001 bar = 100 Pa = 0,1 kPa = 0,0001 MPa = 0,000986923 atm = 0,0145038 PSI = 10,1971621 mmH2O = 0,401463 inH2O = 0,750062 Tr = 0,750062 mmHg = 0,02953 inHg = 2,08854 PSF = 0,00101972 at

hPa to Bar - Hectopascal to Bar pressure unit conversion

To convert pressure from Hectopascal (hPa) to Bar multiply the pressure in Hectopascal (hPa) by 0,001.

• 1 hPa to bar? 1 hPa is equal to 0,001 bar
• 2 hPa to bar? 2 hPa is equal to 0,002 bar
• 5 hPa to bar? 5 hPa is equal to 0,005 bar
• 10 hPa to bar? 10 hPa is equal to 0,01 bar
• 20 hPa to bar? 20 hPa is equal to 0,02 bar
• 50 hPa to bar? 50 hPa is equal to 0,05 bar
• 100 hPa to bar? 100 hPa is equal to 0,1 bar
• 200 hPa to bar? 200 hPa is equal to 0,2 bar
• 500 hPa to bar? 500 hPa is equal to 0,5 bar
• 1000 hPa to bar? 1000 hPa is equal to 1 bar
• 1013 hPa to bar? 1013 hPa is equal to 1,013 bar
• 1500 hPa to bar? 1500 hPa is equal to 1,5 bar
• 2000 hPa to bar? 2000 hPa is equal to 2 bar
• 5000 hPa to bar? 5000 hPa is equal to 5 bar

hPa to Pa - Hectopascal to Pascal pressure unit conversion

To convert pressure from Hectopascal (hPa) to Pascal (Pa) multiply the pressure in Hectopascal (hPa) by 100.

• 1 hPa to Pa? 1 hPa is equal to 100 Pa
• 2 hPa to Pa? 2 hPa is equal to 200 Pa
• 5 hPa to Pa? 5 hPa is equal to 500 Pa
• 10 hPa to Pa? 10 hPa is equal to 1000 Pa
• 20 hPa to Pa? 20 hPa is equal to 2000 Pa
• 50 hPa to Pa? 50 hPa is equal to 5000 Pa
• 100 hPa to Pa? 100 hPa is equal to 10000 Pa
• 200 hPa to Pa? 200 hPa is equal to 20000 Pa
• 300 hPa to Pa? 300 hPa is equal to 30000 Pa
• 400 hPa to Pa? 400 hPa is equal to 40000 Pa
• 500 hPa to Pa? 500 hPa is equal to 50000 Pa
• 1000 hPa to Pa? 1000 hPa is equal to 100000 Pa
• 1013 hPa to Pa? 1013 hPa is equal to 101300 Pa
• 1020 hPa to Pa? 1020 hPa is equal to 102000 Pa

hPa to kPa - Hectopascal to Kilopascal pressure unit conversion

To convert pressure from Hectopascal (hPa) to Kilopascal (kPa) multiply the pressure in Hectopascal (hPa) by 0,1.

• 1 hPa to kPa? 1 hPa is equal to 0,1 kPa
• 2 hPa to kPa? 2 hPa is equal to 0,2 kPa
• 5 hPa to kPa? 5 hPa is equal to 0,5 kPa
• 10 hPa to kPa? 10 hPa is equal to 1 kPa
• 20 hPa to kPa? 20 hPa is equal to 2 kPa
• 50 hPa to kPa? 50 hPa is equal to 5 kPa
• 100 hPa to kPa? 100 hPa is equal to 10 kPa
• 200 hPa to kPa? 200 hPa is equal to 20 kPa
• 300 hPa to kPa? 300 hPa is equal to 30 kPa
• 400 hPa to kPa? 400 hPa is equal to 40 kPa
• 500 hPa to kPa? 500 hPa is equal to 50 kPa
• 1000 hPa to kPa? 1000 hPa is equal to 100 kPa
• 1013 hPa to kPa? 1013 hPa is equal to 101,3 kPa

hPa to MPa - Hectopascal to Megapascal pressure unit conversion

To convert pressure from Hectopascal (hPa) to Megapascal (MPa) multiply the pressure in Hectopascal (hPa) by 0,0001.

• 1 hPa to MPa? 1 hPa is equal to 0,0001 MPa
• 2 hPa to MPa? 2 hPa is equal to 0,0002 MPa
• 5 hPa to MPa? 5 hPa is equal to 0,0005 MPa
• 10 hPa to MPa? 10 hPa is equal to 0,001 MPa
• 20 hPa to MPa? 20 hPa is equal to 0,002 MPa
• 50 hPa to MPa? 50 hPa is equal to 0,005 MPa
• 100 hPa to MPa? 100 hPa is equal to 0,01 MPa
• 200 hPa to MPa? 200 hPa is equal to 0,02 MPa
• 500 hPa to MPa? 500 hPa is equal to 0,05 MPa
• 1000 hPa to MPa? 1000 hPa is equal to 0,1 MPa

hPa to atm - Hectopascal to Atmosphere pressure unit conversion

To convert pressure from Hectopascal (hPa) to Atmosphere (atm) multiply the pressure in Hectopascal (hPa) by 0,000986923.

• 1 hPa to atm? 1 hPa is equal to 0,0009869 atm
• 2 hPa to atm? 2 hPa is equal to 0,0019738 atm
• 5 hPa to atm? 5 hPa is equal to 0,0049346 atm
• 10 hPa to atm? 10 hPa is equal to 0,0098692 atm
• 20 hPa to atm? 20 hPa is equal to 0,0197385 atm
• 50 hPa to atm? 50 hPa is equal to 0,0493462 atm
• 100 hPa to atm? 100 hPa is equal to 0,0986923 atm
• 200 hPa to atm? 200 hPa is equal to 0,1973846 atm
• 500 hPa to atm? 500 hPa is equal to 0,4934615 atm
• 1000 hPa to atm? 1000 hPa is equal to 0,986923 atm

hPa to PSI - Hectopascal to PSI pressure unit conversion

To convert pressure from Hectopascal (hPa) to PSI multiply the pressure in Hectopascal (hPa) by 0,0145038.

• 1 hPa to PSI? 1 hPa is equal to 0,0145038 PSI
• 2 hPa to PSI? 2 hPa is equal to 0,0290076 PSI
• 5 hPa to PSI? 5 hPa is equal to 0,072519 PSI
• 10 hPa to PSI? 10 hPa is equal to 0,145038 PSI
• 20 hPa to PSI? 20 hPa is equal to 0,290076 PSI
• 50 hPa to PSI? 50 hPa is equal to 0,72519 PSI
• 100 hPa to PSI? 100 hPa is equal to 1,45038 PSI
• 200 hPa to PSI? 200 hPa is equal to 2,90076 PSI
• 300 hPa to PSI? 300 hPa is equal to 4,35114 PSI
• 500 hPa to PSI? 500 hPa is equal to 7,2519 PSI
• 1000 hPa to PSI? 1000 hPa is equal to 14,5038 PSI
• 1060 hPa to PSI? 1060 hPa is equal to 15,374028 PSI

hPa to mmH2O - Hectopascal to Milimetre of water column pressure unit conversion

To convert pressure from Hectopascal (hPa) to Milimetre of water column (mmH2O) multiply the pressure in Hectopascal (hPa) by 10,1971621.

• 1 hPa to mmH2O? 1 hPa is equal to 10,1971621 mmH2O
• 2 hPa to mmH2O? 2 hPa is equal to 20,3943242 mmH2O
• 5 hPa to mmH2O? 5 hPa is equal to 50,9858105 mmH2O
• 10 hPa to mmH2O? 10 hPa is equal to 101,971621 mmH2O
• 20 hPa to mmH2O? 20 hPa is equal to 203,943242 mmH2O
• 50 hPa to mmH2O? 50 hPa is equal to 509,858105 mmH2O
• 100 hPa to mmH2O? 100 hPa is equal to 1019,71621 mmH2O
• 200 hPa to mmH2O? 200 hPa is equal to 2039,43242 mmH2O
• 500 hPa to mmH2O? 500 hPa is equal to 5098,58105 mmH2O
• 1000 hPa to mmH2O? 1000 hPa is equal to 10197,1621 mmH2O

hPa to inH2O - Hectopascal to Inch of water column pressure unit conversion

To convert pressure from Hectopascal (hPa) to Inch of water column (inH2O) multiply the pressure in Hectopascal (hPa) by 0,401463.

• 1 hPa to inH2O? 1 hPa is equal to 0,401463 inH2O
• 2 hPa to inH2O? 2 hPa is equal to 0,802926 inH2O
• 5 hPa to inH2O? 5 hPa is equal to 2,007315 inH2O
• 10 hPa to inH2O? 10 hPa is equal to 4,01463 inH2O
• 20 hPa to inH2O? 20 hPa is equal to 8,02926 inH2O
• 50 hPa to inH2O? 50 hPa is equal to 20,07315 inH2O
• 100 hPa to inH2O? 100 hPa is equal to 40,1463 inH2O
• 200 hPa to inH2O? 200 hPa is equal to 80,2926 inH2O
• 500 hPa to inH2O? 500 hPa is equal to 200,7315 inH2O
• 1000 hPa to inH2O? 1000 hPa is equal to 401,463 inH2O

hPa to torr - Hectopascal to torr pressure unit conversion

To convert pressure from Hectopascal (hPa) to torr (Tr) multiply the pressure in Hectopascal (hPa) by 0,750062.

• 1 hPa to torr? 1 hPa is equal to 0,750062 torr
• 2 hPa to torr? 2 hPa is equal to 1,500124 torr
• 5 hPa to torr? 5 hPa is equal to 3,75031 torr
• 10 hPa to torr? 10 hPa is equal to 7,50062 torr
• 20 hPa to torr? 20 hPa is equal to 15,00124 torr
• 50 hPa to torr? 50 hPa is equal to 37,5031 torr
• 100 hPa to torr? 100 hPa is equal to 75,0062 torr
• 200 hPa to torr? 200 hPa is equal to 150,0124 torr
• 500 hPa to torr? 500 hPa is equal to 375,031 torr
• 1000 hPa to torr? 1000 hPa is equal to 750,062 torr

hPa to mmHg - Hectopascal to Milimetre of mercury column pressure unit conversion

To convert pressure from Hectopascal (hPa) to Milimetre of mercury column (mmHg) multiply the pressure in Hectopascal (hPa) by 0,750062.

• 1 hPa to mmHg? 1 hPa is equal to 0,750062 mmHg
• 2 hPa to mmHg? 2 hPa is equal to 1,500124 mmHg
• 5 hPa to mmHg? 5 hPa is equal to 3,75031 mmHg
• 10 hPa to mmHg? 10 hPa is equal to 7,50062 mmHg
• 20 hPa to mmHg? 20 hPa is equal to 15,00124 mmHg
• 50 hPa to mmHg? 50 hPa is equal to 37,5031 mmHg
• 100 hPa to mmHg? 100 hPa is equal to 75,0062 mmHg
• 200 hPa to mmHg? 200 hPa is equal to 150,0124 mmHg
• 500 hPa to mmHg? 500 hPa is equal to 375,031 mmHg
• 1000 hPa to mmHg? 1000 hPa is equal to 750,062 mmHg
• 1013 hPa to mmHg? 1013 hPa is equal to 759,812806 mmHg

hPa to inHg - Hectopascal to Inch of mercury column pressure unit conversion

To convert pressure from Hectopascal (hPa) to Inch of mercury column (inHg) multiply the pressure in Hectopascal (hPa) by 0,02953.

• 1 hPa to inHg? 1 hPa is equal to 0,02953 inHg
• 2 hPa to inHg? 2 hPa is equal to 0,05906 inHg
• 5 hPa to inHg? 5 hPa is equal to 0,14765 inHg
• 10 hPa to inHg? 10 hPa is equal to 0,2953 inHg
• 20 hPa to inHg? 20 hPa is equal to 0,5906 inHg
• 50 hPa to inHg? 50 hPa is equal to 1,4765 inHg
• 100 hPa to inHg? 100 hPa is equal to 2,953 inHg
• 200 hPa to inHg? 200 hPa is equal to 5,906 inHg
• 500 hPa to inHg? 500 hPa is equal to 14,765 inHg
• 1000 hPa to inHg? 1000 hPa is equal to 29,53 inHg

hPa to PSF - Hectopascal to PSF pressure unit conversion

To convert pressure from Hectopascal (hPa) to PSF multiply the pressure in Hectopascal (hPa) by 2,08854.

• 1 hPa to PSF? 1 hPa is equal to 2,08854 PSF
• 2 hPa to PSF? 2 hPa is equal to 4,17708 PSF
• 5 hPa to PSF? 5 hPa is equal to 10,4427 PSF
• 10 hPa to PSF? 10 hPa is equal to 20,8854 PSF
• 20 hPa to PSF? 20 hPa is equal to 41,7708 PSF
• 50 hPa to PSF? 50 hPa is equal to 104,427 PSF
• 100 hPa to PSF? 100 hPa is equal to 208,854 PSF
• 200 hPa to PSF? 200 hPa is equal to 417,708 PSF
• 500 hPa to PSF? 500 hPa is equal to 1044,27 PSF
• 1000 hPa to PSF? 1000 hPa is equal to 2088,54 PSF

hPa to at - Hectopascal to Technical atmosphere pressure unit conversion

To convert pressure from Hectopascal (hPa) to Technical Atmosphere (at) multiply the pressure in Hectopascal (hPa) by 0,00101972.

• 1 hPa to at? 1 hPa is equal to 0,0010197 at
• 2 hPa to at? 2 hPa is equal to 0,0020394 at
• 5 hPa to at? 5 hPa is equal to 0,0050986 at
• 10 hPa to at? 10 hPa is equal to 0,0101972 at
• 20 hPa to at? 20 hPa is equal to 0,0203944 at
• 50 hPa to at? 50 hPa is equal to 0,050986 at
• 100 hPa to at? 100 hPa is equal to 0,101972 at
• 200 hPa to at? 200 hPa is equal to 0,203944 at
• 500 hPa to at? 500 hPa is equal to 0,50986 at
• 1000 hPa to at? 1000 hPa is equal to 1,01972 at