In Hg to PSI Calculator: Convert Inches of Mercury to Pounds per Square Inch
Convert inches of mercury (In Hg) to pounds per square inch (PSI) with ease using our In Hg to PSI calculator. This simple tool allows you to quickly determine the equivalent pressure in PSI based on the inches of mercury (In Hg) value entered.
Understanding In Hg to PSI Conversion
Inches of mercury (In Hg) is a unit of pressure commonly used to measure vacuum and barometric pressure, especially in weather reporting, automotive, and scientific applications. PSI (pounds per square inch) is a more widely used pressure unit in engineering and industrial settings, particularly in the imperial system. Converting between these units is important for understanding and comparing pressure values across different systems and applications.
Conversion Factor
1 inch of mercury (In Hg) is equivalent to 0.4912 PSI under standard conditions (at sea level and at 0°C). This factor is widely used in scientific and engineering calculations to compare different pressure systems.
| Unit | Symbol | Equivalent |
|---|---|---|
| Inches of Mercury | In Hg | 1 In Hg = 0.4912 PSI |
| Pounds per Square Inch | PSI | 1 PSI = 2.036 In Hg |
Formula for In Hg to PSI Conversion
The formula to convert inches of mercury (In Hg) to pounds per square inch (PSI) is:
PSI = In Hg × 0.4912
Where:
- In Hg: Inches of mercury
- PSI: Pounds per square inch (the result)
Common Applications of In Hg to PSI Conversion
| Application | Typical In Hg Range | Typical PSI Range |
|---|---|---|
| Vacuum Systems | 0-30 In Hg | 0-14.74 PSI |
| Barometric Pressure | 29.9 In Hg | 14.7 PSI |
| Automotive Systems | 10-30 In Hg | 4.91-14.74 PSI |
Frequently Asked Questions
What is the relationship between In Hg and PSI?
Inches of mercury (In Hg) is commonly used for measuring pressure in vacuum and barometric systems, while PSI is used in more general engineering applications. The relationship between the two is that 1 In Hg is equal to 0.4912 PSI.
How do I convert In Hg to PSI?
To convert inches of mercury (In Hg) to pounds per square inch (PSI), multiply the In Hg value by 0.4912.
Why is In Hg used instead of PSI in some regions?
In Hg is often used for measuring atmospheric pressure, barometric pressure, and vacuum systems, particularly in the United States. PSI is typically used in industrial and mechanical settings, especially for higher pressure systems.
Can I use this calculator for vacuum pressure systems?
Yes, this calculator can be used to convert vacuum pressure measured in inches of mercury to PSI, making it useful for vacuum applications in industries such as automotive, HVAC, and environmental monitoring.