Inches of mercury to Hectopascals
Type a value in Inches of mercury and get the result in Hectopascals, calculated exactly.
1 Inches of mercury = 33.86388640341 Hectopascals
Precision
Conventional factorThis result is exact.
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Formula
hPa = inHg × 33.86388640341
To convert Inches of mercury to Hectopascals, multiply the value by 33.86388640341.
Worked examples
- 1 inHg × 33.86388640341 = 33.86388640341 hPa
- 100 inHg × 33.86388640341 = 3,386.388640341 hPa
- 50 inHg × 33.86388640341 = 1,693.1943201705 hPa
This factor rests on a conventional or rounded value.
Conversion table
| Inches of mercury (inHg) | Hectopascals (hPa) |
|---|---|
| 1 | 33.86388640341 |
| 2 | 67.72777280682 |
| 3 | 101.59165921023 |
| 4 | 135.45554561364 |
| 5 | 169.31943201705 |
| 6 | 203.18331842046 |
| 7 | 237.04720482387 |
| 8 | 270.91109122728 |
| 9 | 304.77497763069 |
| 10 | 338.6388640341 |
| 15 | 507.95829605115 |
| 20 | 677.2777280682 |
| 25 | 846.59716008525 |
| 30 | 1,015.9165921023 |
| 40 | 1,354.5554561364 |
| 50 | 1,693.1943201705 |
| 60 | 2,031.8331842046 |
| 70 | 2,370.4720482387 |
| 75 | 2,539.79148025575 |
| 80 | 2,709.1109122728 |
| 90 | 3,047.7497763069 |
| 100 | 3,386.388640341 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Hectopascals to Inches of mercury
| Hectopascals (hPa) | Inches of mercury (inHg) |
|---|---|
| 1 | ≈ 0.02952998 |
| 2 | ≈ 0.05905997 |
| 3 | ≈ 0.08858995 |
| 4 | ≈ 0.1181199 |
| 5 | ≈ 0.1476499 |
| 6 | ≈ 0.1771799 |
| 7 | ≈ 0.2067099 |
| 8 | ≈ 0.2362399 |
| 9 | ≈ 0.2657698 |
| 10 | ≈ 0.2952998 |
| 15 | ≈ 0.4429497 |
| 20 | ≈ 0.5905997 |
| 25 | ≈ 0.7382496 |
| 30 | ≈ 0.8858995 |
| 40 | ≈ 1.181199 |
| 50 | ≈ 1.476499 |
| 60 | ≈ 1.771799 |
| 70 | ≈ 2.067099 |
| 75 | ≈ 2.214749 |
| 80 | ≈ 2.362399 |
| 90 | ≈ 2.657698 |
| 100 | ≈ 2.952998 |
Unit definitions
- Inches of mercury inHg
- 25.4 conventional mmHg: 3386.388640341 pascals, used in US weather and aviation.
- Hectopascals hPa
- Exactly 100 pascals, equal to one millibar; used in weather reports.
Questions people ask
Inches of mercury to Hectopascals: what is the conversion factor?
One inHg is 33.86388640341 hPa.
How do I convert Inches of mercury to Hectopascals?
Use the formula above. For example, 100 inHg = 3,386.388640341 hPa.
Is the conversion exact?
Very nearly. One of the units is based on a conventional or rounded value, so treat the result as a close approximation.
Factors checked 19 October 2026.