This converter turns bar into millimeters of mercury instantly, using the exact factor 1 bar = 750.0615758 millimeters of mercury. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
Almost exactly atmospheric pressure; standard in European industry and diving. The clinical unit for blood pressure worldwide.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
bar- The amount you are converting, measured in bar
750.0615758- The exact number of millimeters of mercury in one bar
millimeters of mercury- The converted result
How it works, step by step
- Enter the number of bar you want to convert.
- The value is multiplied by 750.0615758, the exact conversion factor.
- The result is displayed in millimeters of mercury, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 bar
Multiply 5 by 750.06158. That gives 3,750.31 millimeters of mercury. A quick sanity check: one bar is larger than one millimeter of mercury, so the number should get bigger — and it does.
Converting 72 bar
72 × 750.06158 = 54,004.43 millimeters of mercury. Working backwards, 54,004.43 ÷ 750.06158 returns 72 bar, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many millimeters of mercury are in one bar?
Exactly 750.0615758. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert bar to millimeters of mercury?
Millimeters Of Mercury = bar × 750.0615758. To reverse it, divide instead: bar = millimeters of mercury ÷ 750.0615758, which is the same as multiplying by 0.001333223874.
Is the bar bigger than the millimeter of mercury?
Yes. One bar equals 750.062 millimeters of mercury, so it is the larger unit.
Why does my answer differ slightly from other bar to mmhg converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a bar?
Almost exactly atmospheric pressure; standard in European industry and diving.
What is a millimeter of mercury?
The clinical unit for blood pressure worldwide.
Bar to millimeters of mercury reference table
| Bar | Millimeters Of Mercury |
|---|---|
| 0.5 bar | 375.0308 mmHg |
| 1 bar | 750.0616 mmHg |
| 2 bar | 1,500.12 mmHg |
| 3 bar | 2,250.18 mmHg |
| 5 bar | 3,750.31 mmHg |
| 10 bar | 7,500.62 mmHg |
| 15 bar | 11,250.92 mmHg |
| 20 bar | 15,001.23 mmHg |
| 25 bar | 18,751.54 mmHg |
| 50 bar | 37,503.08 mmHg |
| 75 bar | 56,254.62 mmHg |
| 100 bar | 75,006.16 mmHg |
| 250 bar | 187,515.39 mmHg |
| 500 bar | 375,030.79 mmHg |
| 1000 bar | 750,061.58 mmHg |
Exact factor: 1 bar = 750.0615758 millimeters of mercury. Values rounded for display.