Pressure converter
Kilopascals to mmHg
Converting Kilopascals to mmHg is a single multiplication when you know the factor. One kPa equals 7.500616 mmHg, so multiply the value in kPa by 7.500616. The calculator below works in both directions and accepts decimals.
Formula 1 kPa = 7.500616 mmHg
Need the other direction? mmHg to Kilopascals.
How to convert Kilopascals to mmHg
A kilopascal is 1,000 pascals and is common in weather and engineering. One millimetre of mercury is about 133.322 pascals and is used in medicine.
To convert Kilopascals to mmHg, multiply the value in kPa by 7.500616. For example, 10 kPa × 7.500616 = 75.006158 mmHg. This works because the ratio between the two units is constant for every value in pressure.
Worked examples
| kPa | mmHg |
|---|---|
| 1 kPa | 7.500616 mmHg |
| 2.5 kPa | 18.751539 mmHg |
| 5 kPa | 37.503079 mmHg |
| 10 kPa | 75.006158 mmHg |
| 25 kPa | 187.515394 mmHg |
| 50 kPa | 375.030788 mmHg |
| 100 kPa | 750.061576 mmHg |
Reverse conversion
| mmHg | kPa |
|---|---|
| 1 mmHg | 0.13332239 kPa |
| 5 mmHg | 0.66661194 kPa |
| 10 mmHg | 1.333224 kPa |
| 25 mmHg | 3.33306 kPa |
| 50 mmHg | 6.666119 kPa |
| 100 mmHg | 13.332239 kPa |
When this conversion is useful
This is the calculation you need when you are inflating a tyre, reading a barometer or checking an engineering spec. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 kPa is 7,500.62 mmHg.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
kPa to mmHg conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Kilopascals (kPa) | mmHg (mmHg) |
|---|---|
| 1 kPa | 7.500616 mmHg |
| 2 kPa | 15.001232 mmHg |
| 3 kPa | 22.501847 mmHg |
| 4 kPa | 30.002463 mmHg |
| 5 kPa | 37.503079 mmHg |
| 6 kPa | 45.003695 mmHg |
| 7 kPa | 52.50431 mmHg |
| 8 kPa | 60.004926 mmHg |
| 9 kPa | 67.505542 mmHg |
| 10 kPa | 75.006158 mmHg |
| 11 kPa | 82.506773 mmHg |
| 12 kPa | 90.007389 mmHg |
| 13 kPa | 97.508005 mmHg |
| 14 kPa | 105.008621 mmHg |
| 15 kPa | 112.509236 mmHg |
| 16 kPa | 120.009852 mmHg |
| 17 kPa | 127.510468 mmHg |
| 18 kPa | 135.011084 mmHg |
| 19 kPa | 142.511699 mmHg |
| 20 kPa | 150.012315 mmHg |
| 21 kPa | 157.512931 mmHg |
| 22 kPa | 165.013547 mmHg |
| 23 kPa | 172.514162 mmHg |
| 24 kPa | 180.014778 mmHg |
| 25 kPa | 187.515394 mmHg |
| 26 kPa | 195.01601 mmHg |
| 27 kPa | 202.516625 mmHg |
| 28 kPa | 210.017241 mmHg |
| 29 kPa | 217.517857 mmHg |
| 30 kPa | 225.018473 mmHg |
| 31 kPa | 232.519089 mmHg |
| 32 kPa | 240.019704 mmHg |
| 33 kPa | 247.52032 mmHg |
| 34 kPa | 255.020936 mmHg |
| 35 kPa | 262.521552 mmHg |
| 36 kPa | 270.022167 mmHg |
| 37 kPa | 277.522783 mmHg |
| 38 kPa | 285.023399 mmHg |
| 39 kPa | 292.524015 mmHg |
| 40 kPa | 300.02463 mmHg |
| 41 kPa | 307.525246 mmHg |
| 42 kPa | 315.025862 mmHg |
| 43 kPa | 322.526478 mmHg |
| 44 kPa | 330.027093 mmHg |
| 45 kPa | 337.527709 mmHg |
| 46 kPa | 345.028325 mmHg |
| 47 kPa | 352.528941 mmHg |
| 48 kPa | 360.029556 mmHg |
| 49 kPa | 367.530172 mmHg |
| 50 kPa | 375.030788 mmHg |
| 60 kPa | 450.036946 mmHg |
| 70 kPa | 525.043103 mmHg |
| 80 kPa | 600.049261 mmHg |
| 90 kPa | 675.055418 mmHg |
| 100 kPa | 750.061576 mmHg |
Frequently asked questions
How many mmHg are in 1 Kilopascals?
1 kPa equals 7.500616 mmHg.
How do I convert Kilopascals to mmHg?
Multiply the kPa value by 7.500616. Example: 25 kPa = 187.515394 mmHg.
What is 2.5 kPa in mmHg?
2.5 kPa = 18.751539 mmHg.
Is the kPa to mmHg conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.