How many pascals are in 1 mmHg?

One mmHg equals exactly 133.322387415 pascals. This is derived from the conventional definition: the pressure exerted by a 1 mm column of mercury at 0 °C under standard gravity (9.80665 m/s²) with mercury density 13,595.1 kg/m³.

Is mmHg the same as Torr?

For almost all practical purposes, yes. One Torr is defined as exactly 1/760 of a standard atmosphere (101,325 Pa), which equals 133.3224 Pa. One mmHg equals 133.3224 Pa via the mercury column definition. The difference is less than 2 ppm — negligible in medical and engineering use.

What is normal blood pressure in Pa?

Standard blood pressure of 120/80 mmHg equals approximately 15,999 Pa systolic and 10,666 Pa diastolic. Medical devices typically report mmHg because the scale is more intuitive at those magnitudes.

What is atmospheric pressure in mmHg?

Standard atmospheric pressure is 101,325 Pa, which equals exactly 760 mmHg (by the definition of the standard atmosphere). This is also the basis of the Torr unit.

How do I convert kPa to mmHg?

Multiply the kPa value by 7.50062. For example, 100 kPa × 7.50062 = 750.062 mmHg. This tool does the calculation automatically when you select kPa as the input unit.

Pascals to mmHg Converter

Enter a pressure in Pa or kPa and get the equivalent in mmHg (Torr) instantly.

Pressure Converter

Input unit

Pa kPa

Value

mmHg

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Torr (equivalent)

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Quick Reference Table

Pascals (Pa)	mmHg	Context

mmHg	Pascals (Pa)	Context

1 mmHg = 133.322 Pa • 1 kPa = 7.50062 mmHg • 1 atm = 760 mmHg = 101,325 Pa

Summary

This tool converts pressure values from pascals (Pa) or kilopascals (kPa) to millimeters of mercury (mmHg), which is numerically identical to Torr. One mmHg equals exactly 133.322387415 pascals — the value derived from the standard acceleration of gravity and the density of mercury. Use it for blood pressure readings, vacuum system specs, barometric pressure, or any lab measurement that reports in mmHg.

How it works

Select your input unit: Pa or kPa.
Type the pressure value into the input field.
The converter shows the equivalent in mmHg (Torr) instantly.
Click the swap button to convert mmHg back to Pa.
Copy either result with the copy button next to each value.
Scroll down for a quick-reference table of common pressures.

Use cases

Convert blood pressure sensor output in Pa to the mmHg values used in clinical settings.
Translate vacuum chamber pressure readings for laboratory equipment specs.
Check barometric pressure values reported in Pa against mmHg weather data.
Convert gas partial pressures in Pa for physiology or respiratory calculations.
Verify pressure transducer output against mmHg-rated gauges.
Calculate mmHg values for intraocular or intracranial pressure references.

Frequently Asked Questions

Last updated: 2026-06-18 · Reviewed by Nham Vu