Pounds per square inch (psi) to Inches of mercury (inHg) Conversion
Pounds per square inch
Pounds per square inch (psi) is a unit of pressure defined as one pound-force per square inch (approximately 6,894.76 Pa). It is the standard for tyre pressure, hydraulic systems, and gas cylinders in the United States. Standard atmospheric pressure is approximately 14.696 psi. In engineering, gauge pressure (psig — relative to atmosphere) is distinguished from absolute pressure (psia — relative to a perfect vacuum), a distinction critical in thermodynamics and fluid system design.
Inches of mercury
The inch of mercury (inHg) is a unit of pressure equal to the pressure exerted by a column of mercury 1 inch (25.4 mm) high — approximately 3,386.39 Pa or 0.0334 atm. It is used in US aviation for altimeter settings (standard pressure is 29.92 inHg) and in US weather reports for barometric pressure. Pilots set their altimeters in inHg based on local barometric pressure to ensure accurate altitude readings.
| Pounds per square inch (psi) | Inches of mercury (inHg) |
|---|---|
| 0.1 psi | 0.20360206773183 inHg |
| 1 psi | 2.0360206773183 inHg |
| 2 psi | 4.0720413546366 inHg |
| 3 psi | 6.1080620319549 inHg |
| 5 psi | 10.180103386591 inHg |
| 10 psi | 20.360206773183 inHg |
| 20 psi | 40.720413546366 inHg |
| 30 psi | 61.080620319549 inHg |
| 50 psi | 101.80103386591 inHg |
| 100 psi | 203.60206773183 inHg |
| 1000 psi | 2036.0206773183 inHg |
Frequently Asked Questions (FAQ)
How many inches of mercury are in 1 pounds per square inch?
1 pounds per square inch (psi) is exactly 2.036 inches of mercury (inHg).
How do I convert pounds per square inch to inches of mercury?
Multiply the value in pounds per square inch by 2.036 to get the result in inches of mercury. Or use the converter above — type any number and see the result instantly.