Millibar to Inches of Mercury
Convert millibar to inches of mercury instantly. 1 mbar = 0.0295299802 inHg. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert millibar to inches of mercury
To convert millibar to inches of mercury, divide by 33.86389 (multiply by 0.0295299802). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
inHg = mbar × 0.0295299802
Millibar to Inches of Mercury conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Millibar | Inches of Mercury |
|---|---|
| 1 mbar | 0.02953 inHg |
| 2 mbar | 0.05906 inHg |
| 3 mbar | 0.08859 inHg |
| 5 mbar | 0.14765 inHg |
| 10 mbar | 0.2953 inHg |
| 20 mbar | 0.5906 inHg |
| 25 mbar | 0.73825 inHg |
| 50 mbar | 1.476499 inHg |
| 100 mbar | 2.952998 inHg |
| 500 mbar | 14.76499 inHg |
| 1,000 mbar | 29.52998 inHg |
What is a millibar?
A thousandth of a bar, the meteorologist's unit for air pressure.
What is a inches of mercury?
The aviation altimeter unit: 29.92 inHg is standard sea-level pressure.
The formula
inHg = mbar × 0.0295299802
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Millibar to Inches of Mercury
- Type the number of millibar you want to convert.
- Read the result in inches of mercury straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked inches of mercury to millibar page.
Millibar to Inches of Mercury — frequently asked questions
How many inches of mercury are in a millibar?
One millibar equals 0.0295299802 inHg. inHg = mbar × 0.0295299802
What is the formula to convert millibar to inches of mercury?
The formula is inHg = mbar × 0.0295299802. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert inches of mercury back to millibar?
Divide instead of multiplying: one inches of mercury is 33.86389 mbar. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this millibar to inches of mercury free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the millibar to inches of mercury.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error