Atmospheres to Millimeters of Mercury (atm to mmHg) Converter
1 atmosphere (atm) = 760 millimeters of mercury (mmHg). To convert atmospheres to millimeters of mercury, multiply by 760: 25 atm × 760 = 19,000 mmHg. Also searched as atmospheres to millimetres of mercury.
Quick facts
- 1 atm = 760 mmHg
- 1 mmHg = 0.00131579 atm
- Formula: mmHg = atm × 760
- Quick estimate: multiply by about 760
How to convert atmospheres to millimeters of mercury
- Take the value in atmospheres.
- Multiply it by 760 (the number of millimeters of mercury in one atmosphere).
- Round the result to the precision you need.
Worked example: 25 atm × 760 = 19000 mmHg.
To convert millimeters of mercury back to atmospheres, multiply by 0.00131579, or divide by 760.
Source: NIST SP 811 (2008), Appendix B.
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 |
atm to mmHg chart from 1 to 100
- 1 atm 760 mmHg
- 2 atm 1520 mmHg
- 3 atm 2280 mmHg
- 4 atm 3040 mmHg
- 5 atm 3800 mmHg
- 6 atm 4560 mmHg
- 7 atm 5320 mmHg
- 8 atm 6080 mmHg
- 9 atm 6840 mmHg
- 10 atm 7600 mmHg
- 11 atm 8360 mmHg
- 12 atm 9120 mmHg
- 13 atm 9880 mmHg
- 14 atm 10640 mmHg
- 15 atm 11400 mmHg
- 16 atm 12160 mmHg
- 17 atm 12920 mmHg
- 18 atm 13680 mmHg
- 19 atm 14440 mmHg
- 20 atm 15200 mmHg
- 25 atm 19000 mmHg
- 30 atm 22800 mmHg
- 35 atm 26600 mmHg
- 40 atm 30400 mmHg
- 45 atm 34200 mmHg
- 50 atm 38000 mmHg
- 55 atm 41800 mmHg
- 60 atm 45600 mmHg
- 65 atm 49400 mmHg
- 70 atm 53200 mmHg
- 75 atm 57000 mmHg
- 80 atm 60800 mmHg
- 85 atm 64600 mmHg
- 90 atm 68400 mmHg
- 95 atm 72200 mmHg
- 100 atm 76000 mmHg
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 |
Atmospheres vs Millimeters of Mercury
| Atmosphere | Millimeter of Mercury | |
|---|---|---|
| Symbol | atm | mmHg |
| Equals | 1 atm = 760 mmHg | 1 mmHg = 0.00131579 atm |
What is an atmosphere?
Defined as standard atmospheric pressure at sea level. Used as a reference pressure in science and diving.
What is a millimeter of mercury?
The pressure exerted by a 1-millimeter column of mercury. Used for blood pressure and barometric readings.
Frequently asked questions
How many millimeters of mercury are in an atmosphere?
There are 760 millimeters of mercury in 1 atmosphere (1 atm = 759.9998917256 mmHg).
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 do I convert atmospheres to millimeters of mercury?
Multiply the number of atmospheres by 760. For example, 10 atm × 760 = 7,600 mmHg. To convert back, multiply by 0.00131579.
What is 10 atm in millimeters of mercury?
10 atm = 7,600 mmHg.
What is 100 atm in millimeters of mercury?
100 atm = 76,000 mmHg.
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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