Inch of mercury to PSI Converter
Convert inches of mercury to psi with this free pressure converter. The exact relationship used on this page is 1 inch of mercury = 0.491154199634 psi. Type any number — the result updates instantly, works on phones and desktops, and is ready to copy into homework, a spec sheet, or a shopping list.
Formula: PSI = Inch of mercury × 0.491154199634
How to convert inches of mercury to psi
- Enter the value in inches of mercury in the converter.
- Read the equivalent amount in psi.
- Use the swap link if you need psi to inch of mercury instead.
- Check the table for common values without typing.
Worked examples
- 1 inHg = 0.4911541996 psi
- 5 inHg = 2.455770998 psi
- 10 inHg = 4.911541996 psi
- 25 inHg = 12.27885499 psi
Conversion table
Common inches of mercury values converted to psi.
| inHg | psi |
|---|---|
| 1 | 0.4911541996 |
| 2 | 0.9823083993 |
| 3 | 1.473462599 |
| 4 | 1.964616799 |
| 5 | 2.455770998 |
| 6 | 2.946925198 |
| 7 | 3.438079397 |
| 8 | 3.929233597 |
| 9 | 4.420387797 |
| 10 | 4.911541996 |
| 20 | 9.823083993 |
| 50 | 24.55770998 |
| 100 | 49.11541996 |
| 250 | 122.7885499 |
| 500 | 245.5770998 |
| 1,000 | 491.1541996 |
About this conversion
Inch of mercury (inHg) and PSI (psi) are both pressure units. Tire pressure, weather maps, scuba, and industrial gauges all report pressure in different units. Bookmark this URL when you convert inches of mercury to psi often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the psi to inch of mercury converter.
FAQ
How many psi are in 1 inch of mercury?+
1 inch of mercury equals 0.491154199634 psi.
What is the formula to convert inches of mercury to psi?+
PSI = Inch of mercury × 0.491154199634
How do I convert inches of mercury to psi by hand?+
Multiply the inch of mercury value by 0.491154199634. Example: 10 inches of mercury × 0.491154199634 = 4.91154199634 psi.
Is this inHg to psi converter accurate?+
Yes. Linear conversions use internationally agreed factors relative to SI. Temperature and inverse fuel units use the standard offset or reciprocal formulas, not a guessed scale factor.