Psi to Inches Of Mercury
Type a value in either box to convert between psi and inches of mercury. The factor is 2.03602.
| Psi | Inches Of Mercury |
|---|---|
| 1 psi | 2.03602 inHg |
| 2 psi | 4.072041 inHg |
| 3 psi | 6.108061 inHg |
| 5 psi | 10.180102 inHg |
| 10 psi | 20.360205 inHg |
| 25 psi | 50.900512 inHg |
| 50 psi | 101.801023 inHg |
| 100 psi | 203.602046 inHg |
How to use
- Enter a value in the Psi field.
- The Inches Of Mercury figure appears immediately — no button to press.
- Typing in the Inches Of Mercury field converts back to Psi the same way.
- Use the reference table for the values that come up most often.
Psi to Inches Of Mercury formula
Converting psi to inches of mercury is a single multiplication by 2.03602046.
inHg = psi × 2.03602046
Why this factor: the pound per square inch and the inch of mercury are both defined against the pascal, so dividing one definition by the other gives 2.03602046 directly. Both definitions are set out in full below.
To go the other way, divide by 2.03602046 — or use the Inches Of Mercury to Psi converter, which is the same calculation reversed.
Worked example
Take 32 psi and multiply by the factor 2.03602046: the result is 65.152655 inHg.
32 psi × 2.03602046 = 65.152655 inHg
The converter above does this for any value you type, in either direction.
What is a pound per square inch?
Pounds per square inch is the standard pressure unit in the United States.
Definition: One pound-force per square inch, which is about 6,894.757 pascals.
Where it is used: US tire pressure, compressed air and hydraulic systems, and plumbing water pressure.
What is an inch of mercury?
An inch of mercury is the pressure of a one-inch mercury column, used for US barometric pressure.
Definition: About 3,386.389 pascals.
Where it is used: US weather barometric pressure, aircraft altimeter settings, and engine vacuum readings.
Psi vs Inches Of Mercury
The pound per square inch and the inch of mercury belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many inches of mercury are in a pound per square inch?
One pound per square inch equals 2.03602046 inches of mercury.
What is the formula to convert psi to inches of mercury?
Multiply the number of psi by 2.03602046. To reverse it, divide by 2.03602046 instead.
How do I convert inches of mercury back to psi?
Divide by 2.03602046, which is the same as multiplying by 0.4911542.
How many inches of mercury are in 10 psi?
10 psi works out to 20.360205 inHg.
How is the pound per square inch defined?
One pound-force per square inch, which is about 6,894.757 pascals.