Convert millimeters of mercury to bar
Converting millimeters of mercury to bar is a common pressure task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 mmHg equals 0.00133322 bar, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert millimeters of mercury to bar
To convert millimeters of mercury to bar, multiply the number of millimeters of mercury by 0.00133322. For example, 10 mmHg × 0.00133322 = 0.0133322 bar.
bar = mmHg × 0.00133322
- Write down the value in millimeters of mercury you want to convert.
- Multiply it by 0.00133322 (the exact mmHg→bar factor).
- The result is your value in bar. Check it below with the converter or the table.
Conversion table
Common values of millimeters of mercury and their equivalents in bar:
| mmHg | bar |
|---|---|
| 1 | 0.00133322 |
| 2 | 0.00266645 |
| 3 | 0.00399967 |
| 4 | 0.0053329 |
| 5 | 0.00666612 |
| 10 | 0.0133322 |
| 20 | 0.0266645 |
| 25 | 0.0333306 |
| 50 | 0.0666612 |
| 100 | 0.133322 |
| 250 | 0.333306 |
| 500 | 0.666612 |
About these units
Millimeter of Mercury (mmHg). A millimeter of mercury is the pressure exerted by a one-millimeter column of mercury, about 133.32 pascals. Blood pressure and vacuum measurements are still quoted in mmHg.
Bar (bar). A bar equals exactly 100,000 pascals, close to average atmospheric pressure at sea level. It is the standard unit for tire pressure, dive tanks and espresso machines in metric countries.
Frequently asked questions
How do I convert millimeters of mercury to bar?
To convert millimeters of mercury to bar, multiply the number of millimeters of mercury by 0.00133322. For example, 10 mmHg × 0.00133322 = 0.0133322 bar. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many bar are in 1 millimeter of mercury?
1 mmHg = 0.00133322 bar. That is the fixed relationship used by this converter and by international standards.
How many millimeters of mercury are in 1 bar?
1 bar = 750.062 mmHg. If you are converting in the opposite direction, use our Bar to Millimeter of Mercury converter for the dedicated table and FAQ.
Is the millimeters of mercury to bar conversion exact?
Yes. Both units are defined by international agreement, so the factor of 0.00133322 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is millimeter of mercury used for?
A millimeter of mercury is the pressure exerted by a one-millimeter column of mercury, about 133.32 pascals. Blood pressure and vacuum measurements are still quoted in mmHg.