Blood pressure is measured in mmHg, but some European guidelines and lab reports use kPa. One kPa is about 7.5 mmHg, so 16 kPa ≈ 120 mmHg.
How to use the kPa to mmHg Converter
- Type the number of kilopascals into the Kilopascals field. Decimals such as 8 are fine.
- Read the answer in Millimetres of mercury – it updates as you type, with no button to press.
- To convert the other way, type into Millimetres of mercury and the kilopascals are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only kPa ⇄ mmHg. Need a different unit? Use the general pressure converter, where you can choose any “from” and “to” unit.
How it works
Both units measure pressure, so they are always in the same ratio: one kilopascal equals 7.5006158 millimetres of mercury. The calculator multiplies the number of kilopascals you type by 7.5006158 to give millimetres of mercury, and when you type into the millimetres of mercury field it divides by the same factor to give kilopascals. Because the ratio never changes, doubling the kilopascals always doubles the millimetres of mercury. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert kilopascals to millimetres of mercury
- Write down the value in kilopascals, for example 16 kPa.
- Multiply by the conversion factor 7.5006158 (because 1 kilopascal = 7.5006158 mmHg).
- 16 × 7.5006158 = 120.00985 mmHg.
- To go back from millimetres of mercury to kilopascals, divide by 7.5006158 – or multiply by 0.13332239.
kPa to mmHg conversion table
| Kilopascals | Millimetres of mercury | Millimetres of mercury | Kilopascals |
|---|---|---|---|
| 1 kPa | 7.5006158 mmHg | 1 mmHg | 0.13332239 kPa |
| 5 kPa | 37.503079 mmHg | 2 mmHg | 0.26664477 kPa |
| 10 kPa | 75.006158 mmHg | 5 mmHg | 0.66661194 kPa |
| 10.7 kPa | 80.256589 mmHg | 10 mmHg | 1.3332239 kPa |
| 13.3 kPa | 99.75819 mmHg | 20 mmHg | 2.6664477 kPa |
| 16 kPa | 120.00985 mmHg | 50 mmHg | 6.6661194 kPa |
| 20 kPa | 150.01232 mmHg | 100 mmHg | 13.332239 kPa |
| 101.325 kPa | 759.99989 mmHg | 1,000 mmHg | 133.32239 kPa |
What is a kilopascal?
A kilopascal is 1,000 Pa. Tyre pressures in Canada and Australia, weather data and boiler gauges often use kPa; standard air pressure is 101.325 kPa.
What is a millimetre of mercury?
Millimetres of mercury measure pressure by the height of a mercury column. Blood pressure is reported in mmHg, and 760 mmHg is one standard atmosphere.
Quick mental conversion
For a fast estimate, multiply kilopascals by about 7.5 to get millimetres of mercury; the error is about 0.0%. Use the calculator above when you need the exact figure.
Common mistakes to avoid
Mixing gauge pressure (psig, barg) with absolute pressure (psia, bara), treating bar and atm as identical, and confusing kgf/cm² with bar.
Formula
1 kPa = 7.5006158 mmHg1 mmHg = 0.13332239 kPammHg = kPa × 7.5006158Worked example
Inputs — Kilopascals: 16 kPa.
Results — Millimetres of mercury = 120.00985214 mmHg.
Frequently asked questions
How many mmHg in 1 kPa?
About 7.50062 mmHg.
What is 120/80 mmHg in kPa?
About 16.0/10.7 kPa.
How do I convert kilopascals to millimetres of mercury?
Multiply the number of kilopascals by 7.5006158. For example, 16 kPa × 7.5006158 = 120.00985 mmHg.
How do I convert millimetres of mercury back to kilopascals?
Divide by 7.5006158 (or multiply by 0.13332239), or simply type the value into the millimetres of mercury field above.
What is 10 kPa in millimetres of mercury?
10 kPa = 75.006158 mmHg.
What is 5 kPa in millimetres of mercury?
5 kPa = 37.503079 mmHg.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between kilopascals and millimetres of mercury. To pick any pressure unit, use the general pressure converter linked under Related calculators.
What formula does the kPa to mmHg Converter use?
1 kPa = 7.5006158 mmHg.