How many kilopascals are in 1 mmHg?

One millimetre of mercury (1 mmHg) is about 0.133322 kilopascals (kPa) at standard gravity. So 1 mmHg ≈ 0.133322 kPa.

What is the formula to convert mmHg to kPa?

To convert mmHg to kPa, multiply by about 0.133322. The formula is: kPa = mmHg × 0.133322.

Where is mmHg to kPa conversion used?

mmHg to kPa is used in blood pressure readings, anaesthetics, vacuum systems, barometers and general laboratory work where older mmHg values need to be expressed in SI pressure units.

mmHg to kPa – convert millimetres of mercury to kilopascals

Convert mmHg to kPa (millimetres of mercury to kilopascals) for blood pressure, barometers, vacuum gauges and other pressure readings. This page opens the main pressure converter with mmHg → kPa pre-selected.

Open the interactive mmHg → kPa converter:

Use main converter (mmHg → kPa) or switch to kPa → mmHg

On the homepage you can also convert between Pa, kPa, bar, mbar, atm and psi.

Quick reference: mmHg to kPa

One millimetre of mercury is about 0.133322 kPa, so: kPa = mmHg × 0.133322. Examples:

Pressure (mmHg)	Pressure (kPa, approx.)
10 mmHg	1.33 kPa
40 mmHg	5.33 kPa
80 mmHg	10.67 kPa
120 mmHg	16.00 kPa
760 mmHg	101.33 kPa

Why convert mmHg to kPa?

mmHg to kPa comes up when you:

Convert blood pressure from mmHg to kPa for scientific or international reporting.
Translate older barometer or vacuum gauge readings into SI units.
Compare pressure values from medical equipment manuals that use different units.
Standardise lab notes or engineering calculations in kilopascals.

Other pressure converters on this site

This converter assumes standard gravity and temperature; it is intended for everyday engineering and science use, not high-precision metrology.

Page last updated: 11 December 2025.