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Hectopascals to Inches of mercury (hPa to inHg)
Convert hectopascals to inches of mercury: 1 hPa = 0.02953 inHg. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 hPa = 0.02953 inHg
inches of mercury = hectopascals × 0.0295299833 — reverse: hectopascals = inches of mercury × 33.8638864
The factor is derived from the SI definitions of both units (base unit: Pa) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 hPa = 0.14765 inHg
- 12.5 hPa = 0.369125 inHg
- 100 hPa = 2.953 inHg
Hectopascals to inches of mercury conversion table
| Hectopascals (hPa) | Inches of mercury (inHg) |
|---|---|
| 1 | 0.02953 |
| 2 | 0.05906 |
| 3 | 0.0885899 |
| 4 | 0.11812 |
| 5 | 0.14765 |
| 6 | 0.17718 |
| 7 | 0.20671 |
| 8 | 0.23624 |
| 9 | 0.26577 |
| 10 | 0.2953 |
| 15 | 0.44295 |
| 20 | 0.5906 |
| 25 | 0.73825 |
| 30 | 0.885899 |
| 40 | 1.1812 |
| 50 | 1.4765 |
| 75 | 2.21475 |
| 100 | 2.953 |
| 200 | 5.906 |
| 250 | 7.3825 |
| 500 | 14.765 |
| 1000 | 29.53 |
FAQ
How many inches of mercury are in one hectopascal?
1 hPa = 0.02953 inHg. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.
What is the formula to convert hectopascals to inches of mercury?
Multiply the value in hectopascals by 0.0295299833: inches of mercury = hectopascals × 0.0295299833. For example, 5 hPa = 0.14765 inHg.
How do I convert inches of mercury back to hectopascals?
Multiply by the inverse factor 33.8638864 (hectopascals = inches of mercury × 33.8638864), or use the inches of mercury-to-hectopascals page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=hPa&to_unit=inHg - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"hPa","to_unit":"inHg"} - Markdown: https://tttkmbb.com/conversion/hpa-to-inhg.md · JSON: https://tttkmbb.com/conversion/hpa-to-inhg.json (add
?value=for a result) · Units: /api/v1/units?quantity=pressure - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.