1 mbar is equal to approximately 0.02953 inhg.
The conversion from millibar (mbar) to inches of mercury (inhg) is done by multiplying the pressure value in mbar by a constant factor of about 0.02953. This factor comes from the ratio between these two pressure units, allowing accurate transformation between the metric and imperial systems.
Conversion Tool
Result in inhg:
Conversion Formula
The formula to convert millibar (mbar) to inches of mercury (inhg) is:
inhg = mbar × 0.02953
This works because 1 inhg equals approximately 33.8639 mbar. By rearranging that, 1 mbar equals 1/33.8639 inhg, which rounds to 0.02953 inhg.
For example, converting 1 mbar:
- Multiply 1 mbar by 0.02953
- 1 × 0.02953 = 0.02953 inhg
- So, 1 mbar equals 0.02953 inhg
Conversion Example
- Convert 5 mbar to inhg:
- Multiply 5 by 0.02953
- 5 × 0.02953 = 0.14765 inhg
- Result: 5 mbar = 0.14765 inhg
- Convert 12.7 mbar to inhg:
- Multiply 12.7 × 0.02953
- 12.7 × 0.02953 = 0.37493 inhg
- Hence, 12.7 mbar equals 0.37493 inhg
- Convert 0.5 mbar to inhg:
- 0.5 × 0.02953 = 0.01477 inhg
- So, 0.5 mbar is 0.01477 inhg
- Convert 20 mbar to inhg:
- 20 × 0.02953 = 0.5906 inhg
- Therefore, 20 mbar equals 0.5906 inhg
Conversion Chart
The chart below shows pressure values from -24.0 to 26.0 millibar and their corresponding inches of mercury values. To use it, find your mbar value in the left column and read across for the inhg equivalent. Negative values indicate pressures below atmospheric baseline.
| mbar | inhg |
|---|---|
| -24.0 | -0.7087 |
| -20.0 | -0.5906 |
| -16.0 | -0.4725 |
| -12.0 | -0.3544 |
| -8.0 | -0.2362 |
| -4.0 | -0.1181 |
| 0.0 | 0.0000 |
| 2.0 | 0.0591 |
| 6.0 | 0.1772 |
| 10.0 | 0.2953 |
| 14.0 | 0.4134 |
| 18.0 | 0.5315 |
| 22.0 | 0.6497 |
| 26.0 | 0.7678 |
Related Conversion Questions
- How to convert 1 mbar pressure into inhg accurately?
- What is the equivalent of 1 mbar in inches of mercury?
- Can I convert 1 mbar directly to inhg using a simple formula?
- Why does 1 mbar equal approximately 0.02953 inhg?
- Is the conversion from 1 mbar to inhg linear or does it change with pressure?
- What tools can I use to convert 1 mbar to inhg instantly?
- How do I calculate 1 mbar to inhg manually without a calculator?
Conversion Definitions
mbar: Millibar is a measurement unit of pressure, equal to one thousandth of a bar. Widely used in meteorology, it expresses atmospheric pressure with precision, where 1 mbar equals 100 Pascals. It measures the force exerted by air or gas per square meter on a surface.
inhg: Inches of mercury is a unit measuring pressure based on the height of a mercury column in a barometer. 1 inhg equals 33,863.9 Pascals. It’s common in aviation and weather forecasting in countries using imperial units, reflecting the pressure needed to support a column of mercury of one inch.
Conversion FAQs
Is the conversion factor 0.02953 exact for all mbar values?
No, the factor 0.02953 is an approximation based on standard atmospheric conditions. Minor variations in temperature or gravity can slightly affect the exact value, but for most everyday conversions it’s precise enough.
Can I convert negative mbar values to inhg?
Yes, negative mbar values represent pressures below a defined reference point and converting them to inhg works the same way by multiplying with the conversion factor. Negative results indicate lower pressure relative to the baseline.
Why is inches of mercury used instead of other pressure units in some countries?
Inches of mercury comes from traditional barometer measurements where mercury’s height was easy to read. Some countries, particularly the US, still use inhg in aviation, weather forecasts, due to legacy systems and pilot familiarity.
What is the difference between mbar and hPa?
Millibar (mbar) and hectopascal (hPa) represent the same pressure magnitude, both equal to 100 Pascals. They are interchangeable in practice, but hPa is preferred in SI unit contexts while mbar remains common in meteorology.
Does temperature affect the conversion between mbar and inhg?
Temperature can affect mercury density slightly, thus affecting inhg readings. However, for converting between mbar and inhg numerically, temperature influence is negligible unless extreme precision is required.
