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 29.92125558 inches of mercury. Going the other way, 1 inch of mercury = 0.03342105739 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 = 448.8188337 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 | 0.2992125558 inHg |
| 0.1 atm | 2.992125558 inHg |
| 1 atm | 29.92125558 inHg |
| 2 atm | 59.84251116 inHg |
| 3 atm | 89.76376674 inHg |
| 5 atm | 149.6062779 inHg |
| 10 atm | 299.2125558 inHg |
| 20 atm | 598.4251116 inHg |
| 50 atm | 1,496.062779 inHg |
| 100 atm | 2,992.125558 inHg |
| 1,000 atm | 29,921.25558 inHg |
What is a standard atmosphere?
The standard atmosphere is defined as exactly 101,325 pascals — the reference sea-level pressure.
What is an 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 29.92125558 inHg. Going the other way, 1 inHg is 0.03342105739 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 299.2125558 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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