kPa to mmHg Converter
Convert kilopascals to millimetres of mercury — the unit blood pressure is still reported in. Results update as you type; exact factors shown.
One kilopascal is 7.5006 millimetre of mercurys — see the exact factor, not a rounded rule of thumb.
How the kpa to mmhg converter works
Pressures convert through the pascal (1 N/m²). One bar is exactly 100 kPa; a standard atmosphere is exactly 101.325 kPa; 1 psi is 6.894757 kPa (a pound-force on a square inch); 1 mmHg is 133.322 Pa by the conventional definition.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common pressure conversions
| From | To | Units |
|---|---|---|
| 5 kPa | 37.5031 mmHg | kilopascals to millimetre of mercurys |
| 8 kPa | 60.0049 mmHg | kilopascals to millimetre of mercurys |
| 10 kPa | 75.0062 mmHg | kilopascals to millimetre of mercurys |
| 10.7 kPa | 80.2566 mmHg | kilopascals to millimetre of mercurys |
| 12 kPa | 90.0074 mmHg | kilopascals to millimetre of mercurys |
| 16 kPa | 120.0099 mmHg | kilopascals to millimetre of mercurys |
| 20 kPa | 150.0123 mmHg | kilopascals to millimetre of mercurys |
| 40 kPa | 300.0246 mmHg | kilopascals to millimetre of mercurys |
| 60 kPa | 450.0369 mmHg | kilopascals to millimetre of mercurys |
| 80 kPa | 600.0493 mmHg | kilopascals to millimetre of mercurys |
| 101.325 kPa | 759.9999 mmHg | kilopascals to millimetre of mercurys |
| 133.322 kPa | 999.9971 mmHg | kilopascals to millimetre of mercurys |
Units in this converter and their exact factors
| Unit | Symbol | One unit in pascals |
|---|---|---|
| pascal | Pa | 1 pascal |
| kilopascal | kPa | 1,000 pascal |
| megapascal | MPa | 1,000,000 pascal |
| bar | bar | 100,000 pascal |
| millibar (hectopascal) | mbar | 100 pascal |
| standard atmosphere | atm | 101,325 pascal |
| pound per square inch | psi | 6,894.757293168 pascal |
| millimetre of mercury | mmHg | 133.322387415 pascal |
| inch of mercury | inHg | 3,386.389 pascal |
FAQFrequently asked questions about pressure conversion
How many mmHg in one kPa?
7.50062 mmHg.
What is 16 kPa in mmHg?
120 mmHg — the systolic half of a textbook blood pressure.
Why is blood pressure in mmHg?
Early sphygmomanometers read the height of a mercury column directly, and the unit outlived the instrument.
What is normal blood pressure in kPa?
About 16.0/10.7 kPa, which is 120/80 mmHg.
Is the torr the same as mmHg?
Very nearly — they differ by about one part in seven million, which never matters clinically.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.