1 standard atmosphere (atm) = 29.92125558 inches of mercury (inHg). To convert, multiply by 29.92125558: inHg = atm × 29.92125558. For example, 5 atm = 149.6062779 inHg.
inHg = atm × 29.92125558
Standard atmospheres to inches of mercury table
| Standard atmospheres (atm) | Inches of mercury (inHg) |
|---|---|
| 1 | 29.92125558 |
| 2 | 59.84251116 |
| 3 | 89.76376674 |
| 4 | 119.6850223 |
| 5 | 149.6062779 |
| 10 | 299.2125558 |
| 20 | 598.4251116 |
| 25 | 748.0313895 |
| 50 | 1,496.062779 |
| 100 | 2,992.125558 |
| 250 | 7,480.313895 |
| 500 | 14,960.62779 |
| 1,000 | 29,921.25558 |
The two units
Standard atmosphere (atm). Exactly 101,325 pascals: average air pressure at sea level.
Inch of mercury (inHg). The conventional value at 0 °C; US weather reports give barometric pressure in inHg.
Convert standard atmospheres to other units
- Standard atmospheres to pascals — 1 atm = 101,325 Pa
- Standard atmospheres to kilopascals — 1 atm = 101.325 kPa
- Standard atmospheres to bars — 1 atm = 1.01325 bar
- Standard atmospheres to pounds per square inch — 1 atm = 14.69594878 psi
- Standard atmospheres to millimeters of mercury — 1 atm = 759.9998917 mmHg
Convert other units to inches of mercury
Questions people ask
- How many inches of mercury are in a standard atmosphere?
- 29.92125558.
- How do you convert standard atmospheres to inches of mercury?
- inHg = atm × 29.92125558. It is the same as dividing by 0.0334210574.
- How do you convert inches of mercury back to standard atmospheres?
- atm = inHg ÷ 29.92125558. See inches of mercury to standard atmospheres.
Results use the legal definitions of each unit and are checked against the Pint unit library. Display rounds to 10 significant digits. All unit conversions · More tools
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