inHg to kPa Converter

How to convert inches of mercury to kilopascals

FormulakPa = inHg × 3.38638864

Multiply the value in inches of mercury by 3.38638864. To go the other way, multiply by 0.295299833 (or divide by 3.38638864).

An inch of mercury is larger than a kilopascal: one inch of mercury contains 3.38638864 kilopascals.

Worked examples

1 inch of mercury1 inHg × 3.38638864 = 3.38638864 kPa
5 inches of mercury5 inHg × 3.38638864 = 16.9319432 kPa
10 inches of mercury10 inHg × 3.38638864 = 33.8638864 kPa
20 inches of mercury20 inHg × 3.38638864 = 67.72777281 kPa
100 inches of mercury100 inHg × 3.38638864 = 338.638864 kPa

Inches of mercury to kilopascals conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Inches of mercury to kilopascals: 0.1–10 inHg
Inches of mercury (inHg)	Kilopascals (kPa)
0.1 inHg	0.33863886 kPa
0.25 inHg	0.84659716 kPa
0.5 inHg	1.6931943 kPa
1 inHg	3.3863886 kPa
2 inHg	6.7727773 kPa
3 inHg	10.159166 kPa
4 inHg	13.545555 kPa
5 inHg	16.931943 kPa
6 inHg	20.318332 kPa
7 inHg	23.70472 kPa
8 inHg	27.091109 kPa
9 inHg	30.477498 kPa
10 inHg	33.863886 kPa

Inches of mercury to kilopascals: 12–1,000 inHg
Inches of mercury (inHg)	Kilopascals (kPa)
12 inHg	40.636664 kPa
15 inHg	50.79583 kPa
20 inHg	67.727773 kPa
25 inHg	84.659716 kPa
30 inHg	101.59166 kPa
40 inHg	135.45555 kPa
50 inHg	169.31943 kPa
75 inHg	253.97915 kPa
100 inHg	338.63886 kPa
250 inHg	846.59716 kPa
500 inHg	1,693.1943 kPa
1,000 inHg	3,386.3886 kPa

About the units

Inch of mercury (inHg)

About 3,386.39 Pa. US weather reports and aircraft altimeters use inches of mercury (standard is 29.92 inHg). One inch of mercury equals 3,386.38864 pascals (Pa).

Kilopascal (kPa)

One thousand pascals. Tire pressures outside the US are often given in kPa (220–250 kPa for a car). One kilopascal equals 1,000 pascals (Pa).

Frequently asked questions

How many kilopascals are in one inch of mercury?

There are 3.38638864 kilopascals in one inch of mercury, and this value is exact by definition.

How do I convert inches of mercury to kilopascals?

Multiply the number of inches of mercury by 3.38638864. For example, 10 inHg × 3.38638864 = 33.8638864 kPa.

How many inches of mercury are in one kilopascal?

One kilopascal equals 0.295299833 inches of mercury. That is the reverse factor, 1 ÷ 3.38638864.

What is 10 inches of mercury in kilopascals?

10 inHg = 33.8638864 kPa.

Is this inHg to kPa converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.