Table Of Contents
Inch of mercury to millibar Conversion
1 inch of mercury (inHg) is equal to 33.8638864 millibar (mbar).
1 inHg = 33.8638864 mbar
or
1 mbar = 0.0295299833 inHg
Formula
To convert a pressure from inch of mercury (inHg) to millibar (mbar), multiply the pressure in inch of mercury by 33.8638864
p(mbar) = p(inHg) × 33.8638864
Examples:
Convert 50 inch of mercury to millibar:
p(mbar) = 50inHg × 33.8638864 = 1693.19432 mbar
Conversion table
| Inch of mercury (inHg) | Millibar (mbar) |
|---|---|
| 1 inHg | 33.863886403 mbar |
| 2 inHg | 67.727772807 mbar |
| 3 inHg | 101.59165921 mbar |
| 5 inHg | 169.319432017 mbar |
| 10 inHg | 338.638864034 mbar |
| 20 inHg | 677.277728068 mbar |
| 25 inHg | 846.597160085 mbar |
| 50 inHg | 1693.194320171 mbar |
| 100 inHg | 3386.388640341 mbar |
| 250 inHg | 8465.971600853 mbar |
| 500 inHg | 16931.943201705 mbar |
| 1000 inHg | 33863.88640341 mbar |
| Millibar (mbar) | Inch of mercury (inHg) |
|---|---|
| 1 mbar | 0.029529983 inHg |
| 2 mbar | 0.059059967 inHg |
| 3 mbar | 0.08858995 inHg |
| 5 mbar | 0.147649917 inHg |
| 10 mbar | 0.295299833 inHg |
| 20 mbar | 0.590599666 inHg |
| 25 mbar | 0.738249583 inHg |
| 50 mbar | 1.476499165 inHg |
| 100 mbar | 2.95299833 inHg |
| 250 mbar | 7.382495825 inHg |
| 500 mbar | 14.764991651 inHg |
| 1000 mbar | 29.529983301 inHg |
Frequently asked questions
How do I convert inch of mercury to millibar?
Multiply the value in inch of mercury by 33.8638864 to get the result in millibar. For example, 5 inHg × 33.8638864 = 169.319432017 mbar.
How many millibar are in 1 inch of mercury?
1 inch of mercury (inHg) is equal to 33.863886403 millibar (mbar).
How do I convert millibar back to inch of mercury?
Use the inverse operation: divide the value in millibar by 33.8638864 to get the result in inch of mercury.
How accurate is the inch of mercury to millibar conversion?
The converter multiplies by the conversion factor 33.8638864 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
- BIPM — The International System of Units (SI Brochure, 9th edition)
- ISO 80000-4:2019 — Quantities and units — Part 4: Mechanics
- NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically (NIST SP 811, 2008 edition)
- Resolution 4 of the 10th CGPM (1954): Definition of the standard atmosphere
