Millimeters of Mercury to Atmospheres (mmHg to atm) Converter
1 millimeter of mercury (mmHg) = 0.00131579 atmospheres (atm). To convert millimeters of mercury to atmospheres, multiply by 0.00131579: 25 mmHg × 0.00131579 = 0.0328947 atm. Also searched as millimetres of mercury to atmospheres.
Quick facts
- 1 mmHg = 0.00131579 atm
- 1 atm = 760 mmHg
- Formula: atm = mmHg × 0.00131579
- Quick estimate: multiply by about 0.0013
How to convert millimeters of mercury to atmospheres
- Take the value in millimeters of mercury.
- Multiply it by 0.00131579 (the number of atmospheres in one millimeter of mercury).
- Round the result to the precision you need.
Worked example: 25 mmHg × 0.00131579 = 0.0328947 atm.
To convert atmospheres back to millimeters of mercury, multiply by 760, or divide by 0.00131579.
Source: NIST SP 811 (2008), Appendix B.
Millimeters of Mercury to Atmospheres conversion table
| Millimeters of Mercury [mmHg] | Atmospheres [atm] |
|---|---|
| 0.01 mmHg | 0.0000131579 atm |
| 0.1 mmHg | 0.000131579 atm |
| 1 mmHg | 0.0013157897 atm |
| 2 mmHg | 0.0026315793 atm |
| 3 mmHg | 0.003947369 atm |
| 5 mmHg | 0.0065789483 atm |
| 10 mmHg | 0.0131578966 atm |
| 20 mmHg | 0.0263157932 atm |
| 50 mmHg | 0.0657894831 atm |
| 100 mmHg | 0.1315789661 atm |
| 1000 mmHg | 1.3157896611 atm |
mmHg to atm chart from 1 to 100
- 1 mmHg 0.00131579 atm
- 2 mmHg 0.00263158 atm
- 3 mmHg 0.00394737 atm
- 4 mmHg 0.00526316 atm
- 5 mmHg 0.00657895 atm
- 6 mmHg 0.00789474 atm
- 7 mmHg 0.00921053 atm
- 8 mmHg 0.0105263 atm
- 9 mmHg 0.0118421 atm
- 10 mmHg 0.0131579 atm
- 11 mmHg 0.0144737 atm
- 12 mmHg 0.0157895 atm
- 13 mmHg 0.0171053 atm
- 14 mmHg 0.0184211 atm
- 15 mmHg 0.0197368 atm
- 16 mmHg 0.0210526 atm
- 17 mmHg 0.0223684 atm
- 18 mmHg 0.0236842 atm
- 19 mmHg 0.025 atm
- 20 mmHg 0.0263158 atm
- 25 mmHg 0.0328947 atm
- 30 mmHg 0.0394737 atm
- 35 mmHg 0.0460526 atm
- 40 mmHg 0.0526316 atm
- 45 mmHg 0.0592105 atm
- 50 mmHg 0.0657895 atm
- 55 mmHg 0.0723684 atm
- 60 mmHg 0.0789474 atm
- 65 mmHg 0.0855263 atm
- 70 mmHg 0.0921053 atm
- 75 mmHg 0.0986842 atm
- 80 mmHg 0.105263 atm
- 85 mmHg 0.111842 atm
- 90 mmHg 0.118421 atm
- 95 mmHg 0.125 atm
- 100 mmHg 0.131579 atm
Atmospheres to Millimeters of Mercury conversion table
| Atmospheres [atm] | Millimeters of Mercury [mmHg] |
|---|---|
| 0.01 atm | 7.5999989173 mmHg |
| 0.1 atm | 75.9999891726 mmHg |
| 1 atm | 759.9998917256 mmHg |
| 2 atm | 1519.9997834512 mmHg |
| 3 atm | 2279.9996751768 mmHg |
| 5 atm | 3799.9994586281 mmHg |
| 10 atm | 7599.9989172561 mmHg |
| 20 atm | 15199.9978345122 mmHg |
| 50 atm | 37999.9945862806 mmHg |
| 100 atm | 75999.9891725611 mmHg |
| 1000 atm | 759999.8917256112 mmHg |
Millimeters of Mercury vs Atmospheres
| Millimeter of Mercury | Atmosphere | |
|---|---|---|
| Symbol | mmHg | atm |
| Equals | 1 mmHg = 0.00131579 atm | 1 atm = 760 mmHg |
What is a millimeter of mercury?
The pressure exerted by a 1-millimeter column of mercury. Used for blood pressure and barometric readings.
What is an atmosphere?
Defined as standard atmospheric pressure at sea level. Used as a reference pressure in science and diving.
Frequently asked questions
How many atmospheres are in a millimeter of mercury?
There are 0.00131579 atmospheres in 1 millimeter of mercury (1 mmHg = 0.0013157897 atm).
How many millimeters of mercury are in an atmosphere?
There are 760 millimeters of mercury in 1 atmosphere (1 atm = 759.9998917256 mmHg).
How do I convert millimeters of mercury to atmospheres?
Multiply the number of millimeters of mercury by 0.00131579. For example, 10 mmHg × 0.00131579 = 0.0131579 atm. To convert back, multiply by 760.
What is 10 mmHg in atmospheres?
10 mmHg = 0.0131579 atm.
What is 100 mmHg in atmospheres?
100 mmHg = 0.131579 atm.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST SP 811 (2008), Appendix B). Results are shown to up to 10 decimal places; round them to suit your purpose.
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