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inHg to hPa Converter

Convert inches of mercury to hectopascals in one step. Results update live in both directions, with a worked formula, nearby units and a 1–100 chart you can click.

Inches of mercuryFrom

inHg

HectopascalsTo

hPa

Decimal places

Step-by-step calculation

How to use the inHg to hPa Converter

Type a value in the Inches of mercury box. The hectopascals result appears instantly.
Going the other way? Type in the Hectopascals box, or press the ⇄ swap button.
Set the precision with the decimal places menu.
Check the working in the step-by-step box, then press Copy result or click any row in the tables below.

Inches of mercury to hectopascals formula

hPa = inHg × 33.86389

Take the value in inches of mercury.
Multiply it by 33.86389 (the number of hectopascals in one inch of mercury).

Example: 29.92 inHg × 33.86389 = 1,013.21 hPa.

Reverse formula (hectopascals to inches of mercury): inHg = hPa ÷ 33.86389. Example: 1,015.92 hPa ÷ 33.86389 = 30 inHg.

Quick mental estimate: multiply by about 34. For exact answers use the converter above.

inHg to hPa conversion table (1–100)

Click any row to load it into the converter.

Inches of mercury to hectopascals

Inches of mercury	Hectopascals
1 inHg	33.86 hPa
2 inHg	67.73 hPa
3 inHg	101.59 hPa
4 inHg	135.46 hPa
5 inHg	169.32 hPa
6 inHg	203.18 hPa
7 inHg	237.05 hPa
8 inHg	270.91 hPa
9 inHg	304.78 hPa
10 inHg	338.64 hPa
11 inHg	372.5 hPa
12 inHg	406.37 hPa
13 inHg	440.23 hPa
14 inHg	474.09 hPa
15 inHg	507.96 hPa
16 inHg	541.82 hPa
17 inHg	575.69 hPa
18 inHg	609.55 hPa
19 inHg	643.41 hPa
20 inHg	677.28 hPa
21 inHg	711.14 hPa
22 inHg	745.01 hPa
23 inHg	778.87 hPa
24 inHg	812.73 hPa
25 inHg	846.6 hPa
26 inHg	880.46 hPa
27 inHg	914.33 hPa
28 inHg	948.19 hPa
29 inHg	982.05 hPa
30 inHg	1,015.92 hPa
31 inHg	1,049.78 hPa
32 inHg	1,083.64 hPa
33 inHg	1,117.51 hPa
34 inHg	1,151.37 hPa
35 inHg	1,185.24 hPa
36 inHg	1,219.1 hPa
37 inHg	1,252.96 hPa
38 inHg	1,286.83 hPa
39 inHg	1,320.69 hPa
40 inHg	1,354.56 hPa
41 inHg	1,388.42 hPa
42 inHg	1,422.28 hPa
43 inHg	1,456.15 hPa
44 inHg	1,490.01 hPa
45 inHg	1,523.88 hPa
46 inHg	1,557.74 hPa
47 inHg	1,591.6 hPa
48 inHg	1,625.47 hPa
49 inHg	1,659.33 hPa
50 inHg	1,693.19 hPa
51 inHg	1,727.06 hPa
52 inHg	1,760.92 hPa
53 inHg	1,794.79 hPa
54 inHg	1,828.65 hPa
55 inHg	1,862.51 hPa
56 inHg	1,896.38 hPa
57 inHg	1,930.24 hPa
58 inHg	1,964.11 hPa
59 inHg	1,997.97 hPa
60 inHg	2,031.83 hPa
61 inHg	2,065.7 hPa
62 inHg	2,099.56 hPa
63 inHg	2,133.43 hPa
64 inHg	2,167.29 hPa
65 inHg	2,201.15 hPa
66 inHg	2,235.02 hPa
67 inHg	2,268.88 hPa
68 inHg	2,302.74 hPa
69 inHg	2,336.61 hPa
70 inHg	2,370.47 hPa
71 inHg	2,404.34 hPa
72 inHg	2,438.2 hPa
73 inHg	2,472.06 hPa
74 inHg	2,505.93 hPa
75 inHg	2,539.79 hPa
76 inHg	2,573.66 hPa
77 inHg	2,607.52 hPa
78 inHg	2,641.38 hPa
79 inHg	2,675.25 hPa
80 inHg	2,709.11 hPa
81 inHg	2,742.98 hPa
82 inHg	2,776.84 hPa
83 inHg	2,810.7 hPa
84 inHg	2,844.57 hPa
85 inHg	2,878.43 hPa
86 inHg	2,912.29 hPa
87 inHg	2,946.16 hPa
88 inHg	2,980.02 hPa
89 inHg	3,013.89 hPa
90 inHg	3,047.75 hPa
91 inHg	3,081.61 hPa
92 inHg	3,115.48 hPa
93 inHg	3,149.34 hPa
94 inHg	3,183.21 hPa
95 inHg	3,217.07 hPa
96 inHg	3,250.93 hPa
97 inHg	3,284.8 hPa
98 inHg	3,318.66 hPa
99 inHg	3,352.53 hPa
100 inHg	3,386.39 hPa

Hectopascals to inches of mercury

Hectopascals	Inches of mercury
1 hPa	0.03 inHg
2 hPa	0.06 inHg
3 hPa	0.09 inHg
4 hPa	0.12 inHg
5 hPa	0.15 inHg
6 hPa	0.18 inHg
7 hPa	0.21 inHg
8 hPa	0.24 inHg
9 hPa	0.27 inHg
10 hPa	0.3 inHg
11 hPa	0.32 inHg
12 hPa	0.35 inHg
13 hPa	0.38 inHg
14 hPa	0.41 inHg
15 hPa	0.44 inHg
16 hPa	0.47 inHg
17 hPa	0.5 inHg
18 hPa	0.53 inHg
19 hPa	0.56 inHg
20 hPa	0.59 inHg
21 hPa	0.62 inHg
22 hPa	0.65 inHg
23 hPa	0.68 inHg
24 hPa	0.71 inHg
25 hPa	0.74 inHg
26 hPa	0.77 inHg
27 hPa	0.8 inHg
28 hPa	0.83 inHg
29 hPa	0.86 inHg
30 hPa	0.89 inHg
31 hPa	0.92 inHg
32 hPa	0.94 inHg
33 hPa	0.97 inHg
34 hPa	1 inHg
35 hPa	1.03 inHg
36 hPa	1.06 inHg
37 hPa	1.09 inHg
38 hPa	1.12 inHg
39 hPa	1.15 inHg
40 hPa	1.18 inHg
41 hPa	1.21 inHg
42 hPa	1.24 inHg
43 hPa	1.27 inHg
44 hPa	1.3 inHg
45 hPa	1.33 inHg
46 hPa	1.36 inHg
47 hPa	1.39 inHg
48 hPa	1.42 inHg
49 hPa	1.45 inHg
50 hPa	1.48 inHg
51 hPa	1.51 inHg
52 hPa	1.54 inHg
53 hPa	1.57 inHg
54 hPa	1.59 inHg
55 hPa	1.62 inHg
56 hPa	1.65 inHg
57 hPa	1.68 inHg
58 hPa	1.71 inHg
59 hPa	1.74 inHg
60 hPa	1.77 inHg
61 hPa	1.8 inHg
62 hPa	1.83 inHg
63 hPa	1.86 inHg
64 hPa	1.89 inHg
65 hPa	1.92 inHg
66 hPa	1.95 inHg
67 hPa	1.98 inHg
68 hPa	2.01 inHg
69 hPa	2.04 inHg
70 hPa	2.07 inHg
71 hPa	2.1 inHg
72 hPa	2.13 inHg
73 hPa	2.16 inHg
74 hPa	2.19 inHg
75 hPa	2.21 inHg
76 hPa	2.24 inHg
77 hPa	2.27 inHg
78 hPa	2.3 inHg
79 hPa	2.33 inHg
80 hPa	2.36 inHg
81 hPa	2.39 inHg
82 hPa	2.42 inHg
83 hPa	2.45 inHg
84 hPa	2.48 inHg
85 hPa	2.51 inHg
86 hPa	2.54 inHg
87 hPa	2.57 inHg
88 hPa	2.6 inHg
89 hPa	2.63 inHg
90 hPa	2.66 inHg
91 hPa	2.69 inHg
92 hPa	2.72 inHg
93 hPa	2.75 inHg
94 hPa	2.78 inHg
95 hPa	2.81 inHg
96 hPa	2.83 inHg
97 hPa	2.86 inHg
98 hPa	2.89 inHg
99 hPa	2.92 inHg
100 hPa	2.95 inHg

Common values

Inches of mercury	Hectopascals	Example
28 inHg	948.19 hPa	Strong storm (approx.)
29 inHg	982.05 hPa	Low pressure
29.5 inHg	998.98 hPa	29.5 inHg
29.92 inHg	1,013.21 hPa	Standard sea-level pressure
30 inHg	1,015.92 hPa	30 inHg
30.5 inHg	1,032.85 hPa	High pressure
31 inHg	1,049.78 hPa	Very high pressure

About inches of mercury and hectopascals

Inches of mercury (inHg). Inches of mercury (inHg) are used for barometric pressure in US weather reports and aviation altimeters. Standard sea-level pressure is 29.92 inHg.

Hectopascals (hPa). The hectopascal is 100 pascals and equals exactly one millibar. Weather maps and forecasts worldwide give air pressure in hPa; standard sea-level pressure is 1013.25 hPa.

Frequently asked questions

What is 1 inch of mercury in hectopascals?

One inch of mercury equals 33.8639 hectopascals.

How do you convert inches of mercury to hectopascals?

Multiply the number of inches of mercury by 33.86389. For example, 29.92 inHg × 33.86389 = 1,013.21 hPa.

What is 30 inches of mercury in hectopascals?

30 inHg is 1,015.92 hPa.

How do I convert hectopascals back to inches of mercury?

Divide by 33.86389, or press the ⇄ swap button above. For example, 1,015.92 hPa ÷ 33.86389 = 30 inHg.

What is normal barometric pressure?

Standard sea-level pressure is 1013.25 hPa, which equals 29.92 inHg. Weather systems usually range from about 980 hPa (stormy) to 1040 hPa (very settled).

Does this converter work offline?

Once the page has loaded, the conversion runs entirely in your browser, so it keeps working without a connection. It is free and needs no sign-up.

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