Table Of Contents
Inch of mercury to kilopascals Conversion
1 inch of mercury (inHg) is equal to 3.38638864 kilopascals (kPa).
1 inHg = 3.38638864 kPa
or
1 kPa = 0.295299833 inHg
Formula
To convert a pressure from inch of mercury (inHg) to kilopascals (kPa), multiply the pressure in inch of mercury by 3.38638864
p(kPa) = p(inHg) × 3.38638864
Examples:
Convert 50 inch of mercury to kilopascals:
p(kPa) = 50inHg × 3.38638864 = 169.319432 kPa
Conversion table
| Inch of mercury (inHg) | Kilopascals (kPa) |
|---|---|
| 1 inHg | 3.38638864 kPa |
| 2 inHg | 6.772777281 kPa |
| 3 inHg | 10.159165921 kPa |
| 5 inHg | 16.931943202 kPa |
| 10 inHg | 33.863886403 kPa |
| 20 inHg | 67.727772807 kPa |
| 25 inHg | 84.659716009 kPa |
| 50 inHg | 169.319432017 kPa |
| 100 inHg | 338.638864034 kPa |
| 250 inHg | 846.597160085 kPa |
| 500 inHg | 1693.194320171 kPa |
| 1000 inHg | 3386.388640341 kPa |
| Kilopascals (kPa) | Inch of mercury (inHg) |
|---|---|
| 1 kPa | 0.295299833 inHg |
| 2 kPa | 0.590599666 inHg |
| 3 kPa | 0.885899499 inHg |
| 5 kPa | 1.476499165 inHg |
| 10 kPa | 2.95299833 inHg |
| 20 kPa | 5.90599666 inHg |
| 25 kPa | 7.382495825 inHg |
| 50 kPa | 14.764991651 inHg |
| 100 kPa | 29.529983301 inHg |
| 250 kPa | 73.824958253 inHg |
| 500 kPa | 147.649916505 inHg |
| 1000 kPa | 295.29983301 inHg |
Frequently asked questions
How do I convert inch of mercury to kilopascals?
Multiply the value in inch of mercury by 3.38638864 to get the result in kilopascals. For example, 5 inHg × 3.38638864 = 16.931943202 kPa.
How many kilopascals are in 1 inch of mercury?
1 inch of mercury (inHg) is equal to 3.38638864 kilopascals (kPa).
How do I convert kilopascals back to inch of mercury?
Use the inverse operation: divide the value in kilopascals by 3.38638864 to get the result in inch of mercury.
How accurate is the inch of mercury to kilopascals conversion?
The converter multiplies by the conversion factor 3.38638864 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
- BIPM — The International System of Units (SI Brochure, 9th edition)
- ISO 80000-4:2019 — Quantities and units — Part 4: Mechanics
- NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically (NIST SP 811, 2008 edition)
- Resolution 4 of the 10th CGPM (1954): Definition of the standard atmosphere