Inches of Mercury to Kilopascals
Convert inches of mercury to kilopascals instantly. 1 inHg = 3.386389 kPa. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert inches of mercury to kilopascals
To convert inches of mercury to kilopascals, multiply by 3.386389. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
kPa = inHg × 3.386389
Inches of Mercury to Kilopascals conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Inches of Mercury | Kilopascals |
|---|---|
| 1 inHg | 3.386389 kPa |
| 2 inHg | 6.772778 kPa |
| 3 inHg | 10.159167 kPa |
| 5 inHg | 16.931945 kPa |
| 10 inHg | 33.86389 kPa |
| 20 inHg | 67.72778 kPa |
| 25 inHg | 84.659725 kPa |
| 50 inHg | 169.31945 kPa |
| 100 inHg | 338.6389 kPa |
| 500 inHg | 1,693.19 kPa |
| 1,000 inHg | 3,386.39 kPa |
What is a inches of mercury?
The aviation altimeter unit: 29.92 inHg is standard sea-level pressure.
What is a kilopascal?
A thousand pascals. The metric working unit for tyre and system pressures.
The formula
kPa = inHg × 3.386389
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Inches of Mercury to Kilopascals
- Type the number of inches of mercury you want to convert.
- Read the result in kilopascals straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked kilopascals to inches of mercury page.
Inches of Mercury to Kilopascals — frequently asked questions
How many kilopascals are in a inches of mercury?
One inches of mercury equals 3.386389 kPa. kPa = inHg × 3.386389
What is the formula to convert inches of mercury to kilopascals?
The formula is kPa = inHg × 3.386389. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert kilopascals back to inches of mercury?
Divide instead of multiplying: one kilopascal is 0.2952998016 inHg. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this inches of mercury to kilopascals free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the inches of mercury to kilopascals.
- inches of mercury to kilopascals
- 1 inches of mercury to kilopascals
- how many kilopascals in a inches of mercury
- inhg2kpa
- inches of mercury in kilopascals
- inches of mercury to kilopascals converter
- convert inches of mercury to kilopascals
About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error