Torr to mbar Converter
The torr is a traditional vacuum pressure unit named after Evangelista Torricelli. One torr is approximately 1/760 of standard atmospheric pressure. The millibar (mbar) is a metric...
Formula
Source: Engineering Toolbox, NIST | Last reviewed: June 8, 2026
Examples
760 Torr
= 1013.2 mbar
Standard atmospheric pressure
1 Torr
= 1.333 mbar
1 Torr = 1.333 mbar
0.001 Torr
= 0.00133 mbar
High vacuum range (1 millitorr)
Quick Reference Table
| Torr | mbar |
|---|---|
| 0.001 | 0.00133 |
| 0.01 | 0.0133 |
| 0.1 | 0.133 |
| 1 | 1.333 |
| 10 | 13.33 |
| 100 | 133.3 |
| 760 | 1013.25 |
Where is this used?
Laboratory equipment: mass spectrometers, vacuum furnaces, and thin-film deposition systems frequently use both units.
Meteorological pressure readings cross-referenced with industrial vacuum specifications.
Frequently Asked Questions
What vacuum ranges use torr vs mbar?
Rough vacuum (760–1 Torr, 1013–1.33 mbar), medium vacuum (1–10⁻³ Torr, 1.33–1.33×10⁻³ mbar), and high vacuum (below 10⁻³ Torr) are the typical ranges. US equipment tends to use Torr; European equipment uses mbar.
Why are both units still in use?
Historical reasons and regional preferences. The torr is deeply embedded in vacuum physics literature and US industry. The mbar is the SI-compatible unit preferred in Europe. Both will likely coexist indefinitely.
How does mbar relate to hPa?
1 mbar = 1 hPa exactly. Meteorologists prefer hPa because it aligns with SI naming conventions. In vacuum technology, mbar is the traditional term. The numerical value is identical.
Reviewed for accuracy
· Last reviewed: June 8, 2026
All calculations are for reference only. Always verify with manufacturer data and a qualified engineer for critical applications. Learn about our editorial process.