Convert Millimeters of Mercury to Kilopascals
Convert Millimeters of Mercury (mmHg) to Kilopascals (kPa) instantly and accurately.
Conversion Formula
kPa = mmHg × 0.1333223874
About Millimeters of Mercury
One millimetre of mercury (mmHg) = pressure from 1 mm of mercury at 0°C and standard gravity = 133.322 Pa. Clinical medicine worldwide uses mmHg for blood pressure (normal ~120/80 mmHg) and for gas partial pressures in physiology: arterial O₂ ~95-100 mmHg; CO₂ ~40 mmHg; alveolar O₂ ~104 mmHg. Ophthalmologists measure intraocular pressure in mmHg (normal 10-21; glaucoma risk above 21). Vacuum equipment ratings are also given in mmHg. 760 mmHg = 1 atm. 1 mmHg = 133.322 Pa.
About Kilopascals
A kilopascal (kPa) = 1,000 Pa - the practical everyday SI pressure unit for moderate pressures. Car tyre inflation: 200-250 kPa (29-36 psi); truck tyres 550-830 kPa. Blood pressure in SI countries: 16/10.7 kPa (= 120/80 mmHg). Systolic blood pressure 16 kPa. Carbonated beverages are packaged at 200-500 kPa CO₂. Medical oxygen cylinders at 15,000 kPa; scuba cylinders 200-300 bar = 20,000-30,000 kPa. 1 kPa = 1,000 Pa = 0.01 bar = 0.145 psi.
Quick Reference Table
| Millimeters of Mercury (mmHg) | Kilopascals (kPa) |
|---|---|
| 1 mmHg | 0.133322 kPa |
| 2 mmHg | 0.266645 kPa |
| 5 mmHg | 0.666612 kPa |
| 10 mmHg | 1.33322 kPa |
| 25 mmHg | 3.33306 kPa |
| 50 mmHg | 6.66612 kPa |
| 100 mmHg | 13.3322 kPa |