Convert inch of mercury to standard atmosphere
Here you can quickly calculate how many standard atmosphere fit in one inch of mercury.
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- 1 inHg = 0.033421 atm
- 1 atm = 29.921255 inHg
Example: inch of mercury to standard atmosphere
- 1 inch of mercury = 0.033421 standard atmosphere
Inch of mercury to standard atmosphere conversion table
| inch of mercury | standard atmosphere |
|---|---|
| 1 | 0.033421 |
| 2 | 0.066842 |
| 5 | 0.167105 |
| 10 | 0.334211 |
| 20 | 0.668421 |
| 50 | 1.671053 |
| 100 | 3.342106 |
Inch of mercury to standard atmosphere formula
To convert inch of mercury to standard atmosphere, multiply by 0.033421.
1 inHg = 0.033421 atm
Example: 1 inch of mercury = 0.033421 standard atmosphere
Common pressure conversion mistakes
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One atmosphere is not exactly one bar: 1 atm = 1.01325 bar = 101.325 kPa. There is also the technical atmosphere (1 kgf/cm²) at about 0.981 bar. The ~1% differences rarely matter day to day, but engineering and diving calculations need the right unit.
Quick inch of mercury and standard atmosphere conversion quiz
Score:
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63 inch of mercury equals 2.11 standard atmosphere.
Correct answer: 63 inch of mercury = 2.11 standard atmosphere.
157 standard atmosphere equals 2 820 inch of mercury.
Correct answer: 157 standard atmosphere = 4 700 inch of mercury.
113 inch of mercury equals 3.78 standard atmosphere.
Correct answer: 113 inch of mercury = 3.78 standard atmosphere.