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Convert standard atmosphere to hectopascal

Here you can quickly calculate how many hectopascal fit in one standard atmosphere.
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  • 1 atm = 1013.25 hPa
  • 1 hPa = 0.000987 atm

Example: standard atmosphere to hectopascal

  • 1 standard atmosphere = 1013.25 hectopascal

Standard atmosphere to hectopascal conversion table

standard atmosphere hectopascal
1 1013.25
2 2026.5
5 5066.25
10 10132.5
20 20265
50 50662.5
100 101325

Standard atmosphere to hectopascal formula

To convert standard atmosphere to hectopascal, multiply by 1013.25.

1 atm = 1013.25 hPa
Example: 1 standard atmosphere = 1013.25 hectopascal

Common pressure conversion mistakes

  • 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.

Quick standard atmosphere and hectopascal conversion quiz

Score: 0

10 standard atmosphere equals 50 700 hectopascal.

Correct answer: 10 standard atmosphere = 10 100 hectopascal.

100 standard atmosphere equals 10 100 hectopascal.

Correct answer: 100 standard atmosphere = 101 000 hectopascal.

5 hectopascal equals 0.00493 standard atmosphere.

Correct answer: 5 hectopascal = 0.00493 standard atmosphere.

100 hectopascal equals 0.0987 standard atmosphere.

Correct answer: 100 hectopascal = 0.0987 standard atmosphere.

1 hectopascal equals 0.000197 standard atmosphere.

Correct answer: 1 hectopascal = 0.000987 standard atmosphere.

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