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Inches of mercury to Hectopascals Converter

1 inHg = 33.8639 hPa (inch of mercury → hectopascal)

1 inHg = 33.8639 hPa

1 inch of mercury equals 33.8639 hectopascals. To convert inches of mercury to hectopascals, multiply the inch of mercury value by 33.8639. For quick reference: 1 inHg = 33.8639 hPa, 5 inHg = 169.319 hPa, 10 inHg = 338.639 hPa, 100 inHg = 3386.39 hPa.

33.8639
FormulaHectopascals = Inches of mercury × 33.8639
Quick

How to convert inches of mercury to hectopascals

  1. Take your value

    Start with your value in inches of mercury.

  2. Multiply by 33.8639

    Multiply the inch of mercury value by 33.8639. This is the exact conversion factor from inches of mercury to hectopascals.

  3. Read the result

    The product is your value in hectopascals. For example, 5 inHg × 33.8639 = 169.319 hPa.

Conversion formula

The exact factor from inches of mercury to hectopascals is 33.8639.

Hectopascals = Inches of mercury × 33.8639

Inches of mercury to Hectopascals conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from inches of mercury to hectopascals
Inches of mercury (inHg)Hectopascals (hPa)
0.001 inHg0.033864 hPa
0.01 inHg0.33864 hPa
0.1 inHg3.3864 hPa
0.5 inHg16.932 hPa
1 inHg33.864 hPa
1.5 inHg50.796 hPa
2 inHg67.728 hPa
2.5 inHg84.66 hPa
3 inHg101.59 hPa
4 inHg135.46 hPa
5 inHg169.32 hPa
6 inHg203.18 hPa
7 inHg237.05 hPa
8 inHg270.91 hPa
9 inHg304.78 hPa
10 inHg338.64 hPa
14 inHg474.09 hPa
15 inHg507.96 hPa
20 inHg677.28 hPa
25 inHg846.6 hPa
30 inHg1015.9 hPa
32 inHg1083.6 hPa
35 inHg1185.2 hPa
40 inHg1354.6 hPa
50 inHg1693.2 hPa
60 inHg2031.8 hPa
75 inHg2539.8 hPa
80 inHg2709.1 hPa
100 inHg3386.4 hPa
101.325 inHg3431.3 hPa
150 inHg5079.6 hPa
200 inHg6772.8 hPa
250 inHg8466 hPa
300 inHg10159 hPa
400 inHg13546 hPa
500 inHg16932 hPa
760 inHg25737 hPa
1000 inHg33864 hPa
1013.25 inHg34313 hPa
2000 inHg67728 hPa
5000 inHg169319 hPa
10000 inHg338639 hPa
14.7 inHg497.8 hPa
50000 inHg1693195 hPa
100000 inHg3386389 hPa
101325 inHg3431259 hPa
200000 inHg6772778 hPa
500000 inHg16931945 hPa
1000000 inHg33863890 hPa
10000000 inHg338638900 hPa

Real-world reference

Standard atmospheric pressure is 29.92 inHg. US weather reports typically quote barometric pressure in inHg. In hectopascals, that gives you: 1 inHg = 33.8639 hPa, 10 inHg = 338.639 hPa, 100 inHg = 3386.39 hPa.

Frequently asked questions

How many hectopascals are in 1 inch of mercury?
1 inch of mercury equals 33.8639 hectopascals.
How do I convert inches of mercury to hectopascals?
Multiply the inch of mercury value by 33.8639. So x inHg × 33.8639 = the equivalent in hPa.
What is 5 inches of mercury in hectopascals?
5 inches of mercury equals 169.319 hectopascals.
What is 10 inches of mercury in hectopascals?
10 inches of mercury equals 338.639 hectopascals.
What is 100 inches of mercury in hectopascals?
100 inches of mercury equals 3386.39 hectopascals.
How do I convert back from hectopascals to inches of mercury?
Multiply the hectopascal value by 0.02953. For example, 1 hPa = 0.02953 inHg.
Is the inch of mercury bigger than the hectopascal?
Yes. 1 inch of mercury is larger than 1 hectopascal — specifically 33.8639 times larger.
Are these conversion factors exact?
The factor is derived directly from the SI definitions of inch of mercury and hectopascal; the displayed value is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.

About the inch of mercury and the hectopascal

The inch of mercury

The inch of mercury (inHg) equals 3,386.389 Pa under the NIST SP 811 conventional definition. It is the standard unit for barometric pressure on US weather reports and for altimeter settings in US aviation.

The hectopascal

The hectopascal (hPa) equals exactly 100 Pa — numerically identical to the millibar. It is the unit modern meteorological services use on official weather charts and forecasts, having formally replaced the millibar in most national weather services since the 1980s.

Related converters

Hectopascals to Inches of mercury
hPa → inHg
Bars to Kilograms-force per square centimeter
bar → kgf/cm²
Kilograms-force per square centimeter to Kilopascals
kgf/cm² → kPa
Kilopascals to Kilograms-force per square centimeter
kPa → kgf/cm²
Centimeters of water to Millimeters of mercury
cmH₂O → mmHg
Millimeters of mercury to Centimeters of water
mmHg → cmH₂O

Sources