This converter turns kilopascals into inches of mercury instantly, using the exact factor 1 kilopascal = 0.2952998016 inches of mercury. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The standard tyre-pressure unit in metric countries. US aviation and weather altimeter setting unit.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
kilopascals- The amount you are converting, measured in kilopascals
0.2952998016- The exact number of inches of mercury in one kilopascal
inches of mercury- The converted result
How it works, step by step
- Enter the number of kilopascals you want to convert.
- The value is multiplied by 0.2952998016, the exact conversion factor.
- The result is displayed in inches of mercury, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 kilopascals
Multiply 5 by 0.2952998. That gives 1.4765 inches of mercury. A quick sanity check: one kilopascal is smaller than one inch of mercury, so the number should get smaller — and it does.
Converting 72 kilopascals
72 × 0.2952998 = 21.2616 inches of mercury. Working backwards, 21.2616 ÷ 0.2952998 returns 72 kilopascals, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many inches of mercury are in one kilopascal?
Exactly 0.2952998016. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert kilopascals to inches of mercury?
Inches Of Mercury = kilopascals × 0.2952998016. To reverse it, divide instead: kilopascals = inches of mercury ÷ 0.2952998016, which is the same as multiplying by 3.386389.
Is the kilopascal bigger than the inch of mercury?
No. One kilopascal is only 0.2953 of a inch of mercury, so the inch of mercury is the larger unit.
Why does my answer differ slightly from other kilopascals to inhg converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a kilopascal?
The standard tyre-pressure unit in metric countries.
What is a inch of mercury?
US aviation and weather altimeter setting unit.
Kilopascals to inches of mercury reference table
| Kilopascals | Inches Of Mercury |
|---|---|
| 0.5 kPa | 0.14765 inHg |
| 1 kPa | 0.2953 inHg |
| 2 kPa | 0.5906 inHg |
| 3 kPa | 0.885899 inHg |
| 5 kPa | 1.4765 inHg |
| 10 kPa | 2.953 inHg |
| 15 kPa | 4.4295 inHg |
| 20 kPa | 5.906 inHg |
| 25 kPa | 7.3825 inHg |
| 50 kPa | 14.765 inHg |
| 75 kPa | 22.1475 inHg |
| 100 kPa | 29.53 inHg |
| 250 kPa | 73.825 inHg |
| 500 kPa | 147.6499 inHg |
| 1000 kPa | 295.2998 inHg |
Exact factor: 1 kilopascal = 0.2952998016 inches of mercury. Values rounded for display.