Millimeters of mercury to Standard atmospheres – millimeter of mercury to standard atmosphere Converter
1 mmHg ≈ 0.00131579 atm
Formula
atm = mmHg × ≈ 0.00131579
Millimeters of mercury to standard atmospheres conversion table
| millimeters of mercury (mmHg) | standard atmospheres (atm) |
|---|---|
| 0.5 mmHg | 0.000657895 atm |
| 1 mmHg | ≈ 0.00131579 atm |
| 2 mmHg | 0.00263158 atm |
| 3 mmHg | 0.00394737 atm |
| 5 mmHg | 0.00657895 atm |
| 10 mmHg | 0.0131579 atm |
| 20 mmHg | 0.0263158 atm |
| 25 mmHg | 0.0328947 atm |
| 50 mmHg | 0.0657895 atm |
| 75 mmHg | 0.0986842 atm |
| 100 mmHg | 0.131579 atm |
| 250 mmHg | 0.328947 atm |
| 500 mmHg | 0.657895 atm |
| 1000 mmHg | 1.31579 atm |
| 5000 mmHg | 6.57895 atm |
Millimeters of mercury and standard atmospheres are both pressure units. One millimeter of mercury is approximately 0.00131579 standard atmospheres; enter any value above for an instant result, or use the table for common conversions.
Sanity-check examples
1 mmHg = 0.00131579 atm10 mmHg = 0.0131579 atm2.5 mmHg = 0.00328947 atm
Common pitfalls and look-alike units
One standard atmosphere is exactly 101325 Pa while 1 bar is 100000 Pa — about 1.3% apart, so do not mix them. Tire pressures are often quoted in psi or bar (1 bar ≈ 14.5 psi, 1 psi ≈ 6.895 kPa); millimeter of mercury uses the conventional value 1 mmHg = 133.322387415 Pa.
Frequently asked questions
How many standard atmospheres are in a millimeter of mercury?
1 millimeter of mercury (mmHg) is approximately 0.00131579 standard atmosphere (atm).
How do I convert millimeters of mercury to standard atmospheres?
Multiply the millimeter of mercury value by ≈ 0.00131579 to get standard atmosphere — for example, 2 millimeters of mercury = 0.00263158 standard atmosphere.
How do I convert standard atmospheres back to millimeters of mercury?
1 standard atmosphere is approximately 760 millimeter of mercury. Use the swap button or the reverse conversion page linked on this page.