Standard atmospheres to Inches of mercury
1 atm ≈ 29.92 inHg. Edit either value to convert instantly.
Conversion formula
inHg = atm × (101,325) × (1 × 10⁹ / 3.386388640341 × 10¹²)1 atm ≈ 29.9213 inHg
standard atmosphere (atm)
Standard atmosphere is a unit of pressure: 1 atm = 101,325 Pa.
Source: NIST SP 811, Appendix B.9: conversion factors by quantity
inch of mercury (inHg)
Inch of mercury is a unit of pressure: 1 inHg = 3,386.388640341 Pa. Uses the conventional mercury column at 0 °C under standard gravity.
Source: NIST SP 811, Appendix B.9: conversion factors by quantity
Conversion table
| atm | inHg |
|---|---|
| ≈ 29.9213 | |
| ≈ 59.8425 | |
| ≈ 149.606 | |
| ≈ 299.213 | |
| ≈ 448.819 | |
| ≈ 598.425 | |
| ≈ 748.031 | |
| ≈ 897.638 | |
| ≈ 1,196.85 | |
| ≈ 1,346.46 |
| atm | inHg |
|---|---|
| ≈ 1,496.06 | |
| ≈ 1,795.28 | |
| ≈ 2,094.49 | |
| ≈ 2,393.7 | |
| ≈ 2,692.91 | |
| ≈ 2,992.13 | |
| ≈ 4,488.19 | |
| ≈ 4,787.4 | |
| ≈ 5,086.61 | |
| ≈ 5,385.83 |
Frequently asked questions
How many inches of mercury are in 1 standard atmosphere?
1 atm ≈ 29.92 inHg. inHg = atm × (101,325) × (1 × 10⁹ / 3.386388640341 × 10¹²)
How do I convert atm to inHg?
inHg = atm × (101,325) × (1 × 10⁹ / 3.386388640341 × 10¹²)
Is 1 standard atmosphere bigger than 1 inch of mercury?
1 atm ≈ 29.92 inHg.
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