Convert

Millibar to Hectopascal

Exact answer: 1 mbar = 1 hPa (exact – SI decimal prefix)

Millibar and Hectopascal both belong to the Pressure family. The difference is a decimal prefix, so the factor is a clean power of ten. Pressure appears in tyre data, weather reports, hydraulics, gas cylinders and vacuum technology.

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What do you want to convert?

From1 mbar

Result1 hPa

Factor1 mbar = 1 hPa

Source basisBIPM SI Brochure · NIST Guide to SI Appendix B.8

Examples

011 mbar = 1 hPa

Example value from the reference table. Internal calculation uses stored factors; display output is rounded.

02Common mistake

bar, psi and atm appear in different fields. Tyre, weather and lab values need context.

03Base unit: Pa

1 mbar = 100 Pa. Then the value is converted through the base unit Pa into Hectopascal.

Table

Millibar to Hectopascal
Millibar	Hectopascal
1	1
10	10
100	100
500	500
1,000	1,000
1,013.25	1,013.25

Formula

1 mbar = 100 Pa. Then the value is converted through the base unit Pa into Hectopascal.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix B.8Alphabetical conversion factors including pressure and force units.

Related conversions

Hectopascal to MillibarhPa → mbarPressure Millimetre of mercury to HectopascalmmHg → hPaPressure Inch of mercury to HectopascalinHg → hPaPressure Hectopascal to Millimetre of mercuryhPa → mmHgPressure

Search and practice paths

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Factor origin

Factors come from the stored source family and are not derived from rounded display values.

Rounding rule

UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.

When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, conversion with formula, sources reviewed: September 2026. Pressure. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.8.

Common questions

What is the factor for Millibar to Hectopascal?

1 mbar = 1 hPa

Which formula does Millibar to Hectopascal use?

1 mbar = 100 Pa. Then the value is converted through the base unit Pa into Hectopascal.

What is the most common mistake?

bar, psi and atm appear in different fields. Tyre, weather and lab values need context.

When should I verify the result?

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.