Millimetres of mercury to Atmospheres Converter
Convert millimetres of mercury (mmHg) to atmospheres (atm) instantly. Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars.
Result
- Atmospheres
- 0.001316 atm
How to use the millimetres of mercury to atmospheres converter
- Enter the millimetres of mercury (mmHg).
- The results update as you type, or press Calculate.
- Read the atmospheres first, then the supporting figures below it.
Formula
Atmospheres = millimetres of mercury × 0.0013157858
Worked example
For example, with these inputs:
- Millimetres of mercury (mmHg): 1
the calculator returns:
- Atmospheres: 0.001316 atm
Millimetres of mercury to Atmospheres table
| Millimetres of mercury | Atmospheres |
|---|---|
| 1 mmHg | 0.001316 atm |
| 2 mmHg | 0.002632 atm |
| 5 mmHg | 0.006579 atm |
| 10 mmHg | 0.013158 atm |
| 20 mmHg | 0.026316 atm |
| 25 mmHg | 0.032895 atm |
| 50 mmHg | 0.065789 atm |
| 100 mmHg | 0.131579 atm |
| 250 mmHg | 0.328946 atm |
| 500 mmHg | 0.657893 atm |
| 1,000 mmHg | 1.3158 atm |
About this conversion
Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Frequently asked questions
How many atmospheres are in one millimetres of mercury?
1 mmHg = 0.001316 atm.
How do I convert mmHg to atm?
Atmospheres = millimetres of mercury × 0.0013157858.