inHg to atm converter
1 inches of mercury equals 0.03342106 standard atmospheres. Conversions use atm = inHg × 0.033421
inHg → 0.03342106 atm
atm = inHg × 0.033421
Converter
Worked examples
- 1 inHg = 0.03342106 atm
- 2 inHg = 0.06684212 atm
- 5 inHg = 0.1671053 atm
- 10 inHg = 0.33421061 atm
- 100 inHg = 3.342106 atm
inches of mercury to standard atmospheres conversion table
| inHg | atm | Arithmetic |
|---|---|---|
| 1 inHg | 0.03342106 atm | × 0.033421 |
| 2 inHg | 0.06684212 atm | × 0.033421 |
| 3 inHg | 0.10026318 atm | × 0.033421 |
| 4 inHg | 0.13368424 atm | × 0.033421 |
| 5 inHg | 0.1671053 atm | × 0.033421 |
| 6 inHg | 0.20052637 atm | × 0.033421 |
| 8 inHg | 0.26736849 atm | × 0.033421 |
| 10 inHg | 0.33421061 atm | × 0.033421 |
| 12 inHg | 0.40105273 atm | × 0.033421 |
| 15 inHg | 0.50131591 atm | × 0.033421 |
| 20 inHg | 0.66842122 atm | × 0.033421 |
| 25 inHg | 0.83552652 atm | × 0.033421 |
| 30 inHg | 1.002632 atm | × 0.033421 |
| 40 inHg | 1.336842 atm | × 0.033421 |
| 50 inHg | 1.671053 atm | × 0.033421 |
| 60 inHg | 2.005264 atm | × 0.033421 |
| 70 inHg | 2.339474 atm | × 0.033421 |
| 80 inHg | 2.673685 atm | × 0.033421 |
| 90 inHg | 3.007895 atm | × 0.033421 |
| 100 inHg | 3.342106 atm | × 0.033421 |
How to convert inHg to atm
- Take your value in inches of mercury.
- Multiply by 0.033421
- That is your answer in standard atmospheres — no rounding needed until you choose a display precision.
Related conversions
atm to inHgkPa to atmbar to atmpsi to atmatm to kPaatm to baratm to psiatm to mmHgatm to hPaall pressure units
Questions
How many standard atmospheres in 1 inches of mercury?
Exactly 0.03342106 atm. The factor follows from the definitions of both units, not from a measurement, so it is exact.
How do I convert inHg to atm?
Multiply the inches of mercury figure by 0.033421 — or use the converter above, which updates as you type.
Is inHg to atm the same as atm to inHg?
No — they are inverses. One inHg is 0.03342106 atm, while one atm is 29.921252 inHg.
What is 1 inHg in atm?
1 inHg = 0.03342106 atm (see the value page for the full arithmetic).