Inch of mercury to Atmosphere Converter
Convert inches of mercury to atmospheres with this free pressure converter. The exact relationship used on this page is 1 inch of mercury = 0.0334210609425 atmospheres. 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: Atmosphere = Inch of mercury × 0.0334210609425
How to convert inches of mercury to atmospheres
- Enter the value in inches of mercury in the converter.
- Read the equivalent amount in atmospheres.
- Use the swap link if you need atmosphere to inch of mercury instead.
- Check the table for common values without typing.
Worked examples
- 1 inHg = 0.03342106094 atm
- 5 inHg = 0.1671053047 atm
- 10 inHg = 0.3342106094 atm
- 25 inHg = 0.8355265236 atm
Conversion table
Common inches of mercury values converted to atmospheres.
| inHg | atm |
|---|---|
| 1 | 0.03342106094 |
| 2 | 0.06684212189 |
| 3 | 0.1002631828 |
| 4 | 0.1336842438 |
| 5 | 0.1671053047 |
| 6 | 0.2005263657 |
| 7 | 0.2339474266 |
| 8 | 0.2673684875 |
| 9 | 0.3007895485 |
| 10 | 0.3342106094 |
| 20 | 0.6684212189 |
| 50 | 1.671053047 |
| 100 | 3.342106094 |
| 250 | 8.355265236 |
| 500 | 16.71053047 |
| 1,000 | 33.42106094 |
About this conversion
Inch of mercury (inHg) and Atmosphere (atm) 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 atmospheres often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the atmosphere to inch of mercury converter.
FAQ
How many atmospheres are in 1 inch of mercury?+
1 inch of mercury equals 0.0334210609425 atmospheres.
What is the formula to convert inches of mercury to atmospheres?+
Atmosphere = Inch of mercury × 0.0334210609425
How do I convert inches of mercury to atmospheres by hand?+
Multiply the inch of mercury value by 0.0334210609425. Example: 10 inches of mercury × 0.0334210609425 = 0.334210609425 atmospheres.
Is this inHg to atm 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.