How to Convert inHg to Bar Manually
Converting inches of mercury to bar is simple when you apply the correct conversion factor. Follow the steps below for accurate pressure calculations in engineering, meteorology, laboratories, and HVAC applications.
What Is Inches of Mercury (inHg)?
Inch of mercury (inHg) is a pressure unit based on the height of a mercury column in a barometer. It is widely used for atmospheric pressure, vacuum pressure, aviation, HVAC systems, pressure gauges, and weather stations. Although it is not an SI unit, engineers and technicians frequently use it for pressure measurement and calibration.
What Is a Bar?
A bar is a metric pressure unit equal to 100,000 Pascal (Pa). It is commonly used in industrial automation, hydraulic systems, pneumatic systems, process engineering, laboratory instruments, and pressure sensors because it offers a practical scale for engineering pressure measurements.
inHg to Bar Conversion Formula
Use the following formula to convert inches of mercury to bar:
Where:
- Bar = Pressure in bar
- inHg = Pressure in inches of mercury
- 0.0338639 = Conversion factor
Practical Example of inHg to Bar Conversion
Suppose a pressure gauge displays 30 inHg.
Apply the formula:
Result:
This method provides accurate pressure conversion for barometers, vacuum gauges, laboratory equipment, and engineering calculations.
inHg to Bar Conversion Table
Inches of Mercury (inHg) | Bar |
|---|
1 | 0.033864 |
2 | 0.067728 |
5 | 0.169320 |
50 | 1.693195 |
60 | 2.031834 |
70 | 2.370473 |
80 | 2.709112 |
Note: Use the conversion factor 0.0338639 for consistent results. Maintain suitable decimal precision and verify whether measurements represent absolute pressure or gauge pressure before performing engineering or scientific calculations.