This converter turns millibars into torr instantly, using the exact factor 1 millibar = 0.7500616827 torr. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The meteorologist’s unit — sea-level pressure averages 1013.25 mbar. One millimetre of mercury, used in vacuum work.
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
millibars- The amount you are converting, measured in millibars
0.7500616827- The exact number of torr in one millibar
torr- The converted result
How it works, step by step
- Enter the number of millibars you want to convert.
- The value is multiplied by 0.7500616827, the exact conversion factor.
- The result is displayed in torr, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 millibars
Multiply 5 by 0.75006168. That gives 3.7503 torr. A quick sanity check: one millibar is smaller than one torr, so the number should get smaller — and it does.
Converting 72 millibars
72 × 0.75006168 = 54.0044 torr. Working backwards, 54.0044 ÷ 0.75006168 returns 72 millibars, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many torr are in one millibar?
Exactly 0.7500616827. 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 millibars to torr?
Torr = millibars × 0.7500616827. To reverse it, divide instead: millibars = torr ÷ 0.7500616827, which is the same as multiplying by 1.333223684.
Is the millibar bigger than the torr?
No. One millibar is only 0.750062 of a torr, so the torr is the larger unit.
Why does my answer differ slightly from other millibar to torr 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 millibar?
The meteorologist’s unit — sea-level pressure averages 1013.25 mbar.
What is a torr?
One millimetre of mercury, used in vacuum work.
Millibars to torr reference table
| Millibars | Torr |
|---|---|
| 0.5 mbar | 0.375031 Torr |
| 1 mbar | 0.750062 Torr |
| 2 mbar | 1.5001 Torr |
| 3 mbar | 2.2502 Torr |
| 5 mbar | 3.7503 Torr |
| 10 mbar | 7.5006 Torr |
| 15 mbar | 11.2509 Torr |
| 20 mbar | 15.0012 Torr |
| 25 mbar | 18.7515 Torr |
| 50 mbar | 37.5031 Torr |
| 75 mbar | 56.2546 Torr |
| 100 mbar | 75.0062 Torr |
| 250 mbar | 187.5154 Torr |
| 500 mbar | 375.0308 Torr |
| 1000 mbar | 750.0617 Torr |
Exact factor: 1 millibar = 0.7500616827 torr. Values rounded for display.