Convert Torr to Millibars
1 torr equals 1.333223684 millibars (mbar).
1 Torr = 1.333223684 mbar
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk torr to millibar converter to paste a column from Excel.
How to Convert Torr to Millibar
- 1 Torr = 1.333223684 mbar
- 1 mbar = 0.7500616827 Torr
- Example: convert 15 Torr to mbar: 15 Torr = 15 × 1.333223684 mbar = 19.99835526 mbar
Formula
mbar = Torr × 1.333223684211
Derivation from SI units:
- 1 Torr = 101325/760 Pa = 133.3223684 Pa (1/760 of a standard atmosphere)
- 1 mbar = 10⁻³ bar = 100 Pa = 1 hPa
- 1 Torr = 133.3223684211 Pa ÷ 100 Pa per mbar = 1.333223684211 mbar
Both units are defined exactly, so the factor is exact. Torr definition: torr; Millibar definition: millibar.
Worked examples
- 1 Torr equals 1.333223684 mbar.
1 Torr × 1.333223684 = 1.333223684 mbar - A high-vacuum pressure of 0.001 Torr is 0.001333223684 mbar.
0.001 Torr × 1.333223684 = 0.001333223684 mbar
Torr to Millibar conversion table
| Torr | Millibars (mbar) |
|---|---|
| 0.000001 Torr | 0.000001333223684 mbar |
| 0.00001 Torr | 0.00001333223684 mbar |
| 0.0001 Torr | 0.0001333223684 mbar |
| 0.001 Torr | 0.001333223684 mbar |
| 0.01 Torr | 0.01333223684 mbar |
| 0.1 Torr | 0.1333223684 mbar |
| 0.5 Torr | 0.6666118421 mbar |
| 1 Torr | 1.333223684 mbar |
| 5 Torr | 6.666118421 mbar |
| 10 Torr | 13.33223684 mbar |
| 50 Torr | 66.66118421 mbar |
| 100 Torr | 133.3223684 mbar |
| 250 Torr | 333.3059211 mbar |
| 500 Torr | 666.6118421 mbar |
| 750 Torr | 999.9177632 mbar |
| 760 Torr | 1013.25 mbar |
| 1000 Torr | 1333.223684 mbar |
Where it's used
Vacuum equipment from the US is specified in torr; European pumps and gauges use mbar. One torr is about 1.333 mbar.
Torr to other pressure units
| Conversion | 1 Torr equals |
|---|---|
| torr to pascal | 133.3223684 Pa |
| torr to kilopascal | 0.1333223684 kPa |
| torr to megapascal | 0.0001333223684 MPa |
| torr to psi | 0.0193367747 psi |
| torr to bar | 0.001333223684 bar |
| torr to millibar | 1.333223684 mbar |
| torr to decibar | 0.01333223684 dbar |
| torr to millimeter of mercury | 0.9999998575 mmHg |
| torr to millimeter of water | 13.59509806 mmH₂O |
| torr to centimeter of water | 1.359509806 cmH₂O |
| torr to inch of water | 0.5352400812 inH₂O |
| torr to inch of water (60 °F) | 0.5357754719 inH₂O (60 °F) |
| torr to inch of mercury | 0.03937007313 inHg |
| torr to atmosphere | 0.001315789474 atm |
| torr to barye | 1333.223684 Ba |
Frequently asked questions
Is a torr or an mbar bigger?
The torr: 1 Torr = 1.333223684 mbar.
How many millibars are in 1 torr?
1 Torr = 1.333223684 mbar.
How do I convert torr to millibars?
Multiply the value in Torr by 1.333223684. For example, 15 Torr × 1.333223684 = 19.99835526 mbar.
Is the Torr to mbar conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "torr (Torr)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "millibar".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Torr to Millibars. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/torr-to-millibar/
IEEE
Scientific Converters, "Convert Torr to Millibars," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/pressure/torr-to-millibar/