How do you convert hectopascals to pascals?

To convert hectopascals (hPa) to pascals (Pa), multiply the pressure in hectopascals by 100 (pascals = hectopascals × 100).

What is 1013.25 hectopascals in pascals?

1013.25 hectopascals (1013.25 hPa) is equal to 101,325 pascals (101,325 Pa).

Which is larger, 1 hectopascal (hPa) or 1 pascal (Pa)?

One hectopascal (hPa) is larger than one pascal (Pa). Specifically, 1 hPa contains 100 Pa, whereas 1 Pa is 0.01 hPa.

How do I convert back from pascals (Pa) to hectopascals (hPa)?

To reverse the calculation from Pa to hPa, multiply your pascal value by the inverse factor 0.01 (or divide by 100). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round hPa to Pa results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 1013.25 hPa ≈ 101,325.00 Pa). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Hectopascals to Pascals Converter

Enter the pressure in hectopascals below to convert it to pascals.

Pascals to Hectopascals (Pa → hPa)

Convert Hectopascals to Pascals

Enter a value in hectopascals (hPa) to convert to pascals (Pa).

Value (hPa)

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Result

•

101,325pascals

1013.25 hPa = 101,325 Pa

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Equivalent Measurements Across UnitsFor 1013.25 hPa

Pascals101,325 Pa

Kilopascals101.325 kPa

Bars1.01325 bar

PSI14.69595 psi

Atmospheres1 atm

Suggested Conversions

Reference:NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))

[1–3] ↓

Hectopascal to Pascal Conversion Table

Table showing various hectopascal measurements converted to pascals. Click any preset value or arrow to load it into the converter.

Hectopascals (hPa)	Pascals (Pa)
1 hPa	100 Pa
2 hPa	200 Pa
5 hPa	500 Pa
10 hPa	1,000 Pa
15 hPa	1,500 Pa
20 hPa	2,000 Pa
25 hPa	2,500 Pa
30 hPa	3,000 Pa
50 hPa	5,000 Pa
75 hPa	7,500 Pa

How to Convert Hectopascals to Pascals

To convert hectopascals to pascals, multiply the pressure by the following conversion ratio: 100 pascals/hectopascal.

Since one hectopascal is equal to 100 pascals, you can use this simple formula to convert:

pascals = hectopascals × 100

The pressure in pascals is equal to the pressure in hectopascals multiplied by 100.

For example, here's how to convert 1013.25 hectopascals to pascals using the formula above.

pascals = (1013.25 hPa × 100) = 101,325 Pa

How Many Pascals Are in a Hectopascal?

There are 100 pascals in a hectopascal, which is why we use this value in the formula above.

1 hPa = 100 Pa|1 Pa = 0.01 hPa

Our hectopascal to pascal calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Hectopascals and pascals are both units used to measure pressure. Keep reading to learn more about each unit.

What Is a Hectopascal?

A hectopascal is a unit of pressure equal to 100 pascals (Pa), the base unit for pressure. Equal to 100 Pascals (identical to 1 millibar). [1]

The hectopascal is classified as a metric and SI-compatible unit of pressure. Hectopascals can be abbreviated as hPa; for example, 1 hectopascal can be written as 1 hPa.

In the metric system, "hecto" is the standard SI prefix for hundreds, or 10². This makes the hectopascal (hPa) a convenient decimal multiple of the pascal (Pa).

In practice, hectopascals (hPa) are widely used across standard pressure applications within SI metric workflows, engineering documentation, and technical data sheets.

Learn more about hectopascals in our Pressure Converter.

What Is a Pascal?

SI derived unit of pressure equal to 1 Newton per square meter (N/m²). It serves as a primary reference unit for measuring pressure across scientific and practical applications. [2]

The pascal is classified as an International System of Units (SI) unit of pressure. Pascals can be abbreviated as Pa; for example, 1 pascal can be written as 1 Pa.

As the primary coherent reference unit for pressure in this category, all other pressure units are mathematically anchored to the pascal (Pa).

In practice, pascals (Pa) are widely used across standard pressure applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.

Learn more about pascals in our Pressure Converter.

When converting pressure between hectopascals (hPa) and pascals (Pa), keep full floating-point precision (1 hPa = 100 Pa; 1 Pa = 0.01 hPa) during intermediate calculations and round only the final pascal figure to match your instrument tolerance.

More Hectopascal & Pascal Conversions

Need to calculate in the opposite direction? Use our pascals to hectopascals converter (Pa to hPa) to switch your starting unit immediately. You can also explore related tools such as converting megapascals to pascals, converting hectopascals to inches of mercury, or converting psi to bars.

Convert from Hectopascals

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Frequently Asked Questions

There are 100 pascals (Pa) in 1 hectopascal (hPa). Conversely, 1 pascal (Pa) is equal to 0.01 hectopascals (hPa).

Pressure Converter

Quick Info

Direct Factor: 1 hectopascal (hPa) equals 100 pascals (Pa).
Inverse Factor: 1 pascal (Pa) equals 0.01 hectopascals (hPa).
Formula: pascals = hectopascals × 100.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Hectopascal (hPa)

Equal to 100 Pascals (identical to 1 millibar).

Pascal (Pa)

SI derived unit of pressure equal to 1 Newton per square meter (N/m²).

Kilopascal (kPa)

Equal to 1,000 Pascals (1 kN/m²).

References

[1]NIST SP 811 · NIST SP 811 App. B.9 (Pressure & Stress)
Source
[2]NIST CUU · Derived SI Unit: Pascal (Pa)
Source
[3]BIPM · SI Brochure (9th Ed.) — Mechanics
Source

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References

NIST · BIPM · ISO

[1]
NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — Hectopascals (hPa) to Pascals (Pa)
NIST SP 811 Standard
[2]
NIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Hectopascal (hPa) & Pascal (Pa)
NIST CUU Specification
[3]
BIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (hPa to Pa)
BIPM Reference

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