Convert hectopascal to standard atmosphere

Here you can quickly calculate how many standard atmosphere fit in one hectopascal.

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Conversion from hectopascal to standard atmosphere example

Starting value Increment Accuracy

To convert hectopascal to standard atmosphere, multiply by 0.000987.

1 hPa = 0.000987 atm

Example: 1 hectopascal = 0.000987 standard atmosphere

One atmosphere is not exactly one bar: 1 atm = 1.01325 bar = 101.325 kPa. There is also the technical atmosphere (1 kgf/cm²) at about 0.981 bar. The ~1% differences rarely matter day to day, but engineering and diving calculations need the right unit.
Blood pressure uses mmHg (120/80) and weather reports use hPa (around 1,013), different units that must not be mixed: 760 mmHg = 1,013.25 hPa. One mmHg is about 1.33 hPa.
Hectopascals and millibars are exactly the same size: 1 hPa = 1 mbar. A chart showing 1,013 mbar and one showing 1,013 hPa agree perfectly, no conversion needed. Meteorology simply renamed the unit.

Score: 0

10 hectopascal equals 0.0493 standard atmosphere.

Correct answer: 10 hectopascal = 0.00987 standard atmosphere.

5 standard atmosphere equals 5.07e+3 hectopascal.

Correct answer: 5 standard atmosphere = 5.07e+3 hectopascal.

10 hectopascal equals 0.00197 standard atmosphere.

Correct answer: 10 hectopascal = 0.00987 standard atmosphere.

50 hectopascal equals 0.493 standard atmosphere.

Correct answer: 50 hectopascal = 0.0493 standard atmosphere.

1 standard atmosphere equals 1.01e+3 hectopascal.

Correct answer: 1 standard atmosphere = 1.01e+3 hectopascal.