Inches of mercury to PSI Converter
Convert inches of mercury (inHg) to psi (psi) instantly. Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars.
Result
- PSI
- 0.491154 psi
How to use the inches of mercury to psi converter
- Enter the inches of mercury (inHg).
- The results update as you type, or press Calculate.
- Read the psi first, then the supporting figures below it.
Formula
PSI = inches of mercury × 0.4911542205
Worked example
For example, with these inputs:
- Inches of mercury (inHg): 1
the calculator returns:
- PSI: 0.491154 psi
Inches of mercury to PSI table
| Inches of mercury | PSI |
|---|---|
| 1 inHg | 0.491154 psi |
| 2 inHg | 0.982308 psi |
| 5 inHg | 2.4558 psi |
| 10 inHg | 4.9115 psi |
| 20 inHg | 9.8231 psi |
| 25 inHg | 12.2789 psi |
| 50 inHg | 24.5577 psi |
| 100 inHg | 49.1154 psi |
| 250 inHg | 122.7886 psi |
| 500 inHg | 245.5771 psi |
| 1,000 inHg | 491.1542 psi |
About this conversion
Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Frequently asked questions
How many psi are in one inches of mercury?
1 inHg = 0.491154 psi.
How do I convert inHg to psi?
PSI = inches of mercury × 0.4911542205.