Convert atm to inHg
standard atmospheres to inches of mercury. Enter a value to convert, or use the atm to inHg chart further down the page.
1 standard atmosphere equals 29.9213 inches of mercury. Going the other way, 1 inch of mercury = 0.0334211 standard atmospheres.
How to convert atm to inHg
To convert standard atmospheres to inches of mercury, multiply the standard atmosphere value by 29.92125558. You can also divide by 0.03342105739 to get the same answer.
inHg = atm × 29.92125558
Worked example
Convert 15 atm to inches of mercury:
15 atm = 448.819 inHg
atm to inHg conversion chart
Use this atm to inHg table for quick reference without typing anything.
| standard atmospheres (atm) | inches of mercury (inHg) |
|---|---|
| 0.01 atm | 0.299213 inHg |
| 0.1 atm | 2.99213 inHg |
| 1 atm | 29.9213 inHg |
| 2 atm | 59.8425 inHg |
| 3 atm | 89.7638 inHg |
| 5 atm | 149.606 inHg |
| 10 atm | 299.213 inHg |
| 20 atm | 598.425 inHg |
| 50 atm | 1,496.06 inHg |
| 100 atm | 2,992.13 inHg |
| 1,000 atm | 29,921.3 inHg |
What is a standard atmosphere?
The standard atmosphere is defined as exactly 101,325 pascals — the reference sea-level pressure.
What is a inch of mercury?
An inch of mercury is about 3,386.39 pascals. Aircraft altimeters and US weather reports use it; the standard sea-level setting is 29.92 inHg.
Frequently asked questions
How many inHg are in a standard atmosphere?
1 atm equals 29.9213 inHg. Going the other way, 1 inHg is 0.0334211 atm.
How do you convert atm to inHg?
To convert standard atmospheres to inches of mercury, multiply the standard atmosphere value by 29.92125558. You can also divide by 0.03342105739 to get the same answer.
What is 10 atm in inHg?
10 atm equals 299.213 inHg. The conversion chart on this page lists the other values people look up most often.
Related pressure conversions
Convert atm to other units
Convert other units to inHg
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