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Hectopascal to Millimetre of mercury

Exact answer: 1 hPa = 0.750061575846 mmHg (exact defined factor)

Hectopascal and Millimetre of mercury describe the same quantity from the Pressure family but come from different systems of units. The factor is defined exactly. Pressure appears in tyre data, weather reports, hydraulics, gas cylinders and vacuum technology.

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From1 hPa
Result0.750062 mmHg
Factor1 hPa = 0.750061575846 mmHg
Source basisBIPM SI Brochure · NIST Guide to SI Appendix B.8

Examples

011 hPa = 0.750062 mmHg

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 hPa = 100 Pa. Then the value is converted through the base unit Pa into Millimetre of mercury.

Table

Hectopascal to Millimetre of mercury
HectopascalMillimetre of mercury
10.750062
107.500616
10075.006158
500375.030788
1,000750.061576
1,013.25759.999892

Formula

1 hPa = 100 Pa. Then the value is converted through the base unit Pa into Millimetre of mercury.

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

Millibar to Hectopascalmbar → hPaPressureHectopascal to MillibarhPa → mbarPressureMillimetre of mercury to HectopascalmmHg → hPaPressureInch of mercury to HectopascalinHg → hPaPressure

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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 Hectopascal to Millimetre of mercury?

1 hPa = 0.750061575846 mmHg

Which formula does Hectopascal to Millimetre of mercury use?

1 hPa = 100 Pa. Then the value is converted through the base unit Pa into Millimetre of mercury.

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.