Hectopascal is 100 pascal units.
Hectopascals to Pascals Converter — hPa to Pa
Convert Hectopascal (hPa) to Pascal (Pa) using the exact conversion factor (1 hectopascal = 100 pascal). See the formula, worked examples, conversion table, history, and common uses.
Hectopascals to Pascals converter
Converter
Pressure Converter
Convert pascals, bars, PSI, atmospheres, mercury columns, water columns, and engineering pressure units.
Context values
Some unit families need one extra value for a physically accurate result.
The pascal is one newton per square meter.
Result = input x 100 / 1.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Hectopascals to Pascals
Hectopascal and Pascal both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Specifically: Hectopascal is 100 pascal units, and the pascal is one newton per square meter.
Formula
pascals = hectopascals × 100
This factor comes from each unit's defined relationship to the category's base unit: 1 hectopascal equals 100 base units, and 1 pascal equals 1 base unit, so dividing one by the other gives the direct hectopascal-to-pascal factor of 100.
Simple example
1 hPa × 100 = 100 Pa
1 hectopascal = 100 pascals.
Real-world example
35 hPa × 100 = 3,500 Pa
35 hectopascals = 3,500 pascals.
Conversion table
| Hectopascal (hPa) | Pascal (Pa) |
|---|---|
| 1 hPa | 100 Pa |
| 5 hPa | 500 Pa |
| 10 hPa | 1,000 Pa |
| 25 hPa | 2,500 Pa |
| 50 hPa | 5,000 Pa |
| 100 hPa | 10,000 Pa |
Reverse conversion: Pascal to Hectopascal
100 Pa × 0.01 = 1 hPa
100 pascals = 1 hectopascal.
hectopascals = pascals × 0.01
For a page dedicated to this direction, see Pascal to Hectopascal.
Understanding the Hectopascal (hPa)
Hectopascal is 100 pascal units.
Understanding the Pascal
Pascal (Pa) measures pressure. The pascal is the SI derived unit of pressure: one newton of force per square meter. It is classified as a SI derived unit.
Where it's used: Standard scientific pressure unit worldwide
Uses of the Pascal today
- Scientific and engineering pressure measurement worldwide
- Meteorology (often as hectopascals, equivalent to millibars)
- Material science (stress and strength, typically in megapascals)
History of the Pascal
The pascal is named after Blaise Pascal, whose 17th-century experiments clarified the physics of fluid pressure and vacuum. It was adopted as the SI derived unit of pressure in 1971, replacing the older, non-coherent CGS pressure units used in much scientific work up to that point.
Historical origin. Pascal was not the invention of a single named person; it developed through the process described above.
Pascal — sources
- BIPM SI Brochure — Coherent derived units — Defines the pascal as the SI unit of pressure.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pascals are in 1 hectopascal?
1 hectopascal equals 100 pascals, using the exact defined conversion factor rather than an estimate.
How do I convert hectopascal to pascal?
Multiply the hectopascal value by 100. The converter above does this instantly to whatever precision you set.
How do I convert pascal back to hectopascal?
Use the reverse factor: 1 pascal equals 0.01 hectopascals. You can also use the swap control in the converter above to flip the direction instantly.
What is a hectopascal?
Hectopascal (hPa) is a unit of pressure.
What is a pascal?
Pascal (Pa) measures pressure. The pascal is the SI derived unit of pressure: one newton of force per square meter. It is classified as a SI derived unit.
Is the hectopascal to pascal conversion exact?
Yes. Both hectopascal and pascal are defined by fixed standards rather than physical artifacts, so the factor of 100 used above is exact to as many digits as you choose to display.