In 1 bars there are 750,061.682704 millitorr. Meanwhile in 1 millitorr there are 0.00000133322 bars. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Millitorr to Bars calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert bar to millitorr (mTorr), use a fixed pressure conversion based on standard units.
Key facts
Bar to millitorr formula
Quick example
Use this conversion for vacuum pressure readings and any bar to mTorr unit change where you need consistent results.
1 bar equals 750,061.683 millitorr (mTorr).
To convert bars to millitorr, multiply the bar value by 750,061.683.
Use this formula:
mTorr = bar × 750,061.683
Example:
0.02 bar × 750,061.683 = 15,001.2337 mTorr
Bar is common for general pressure and weather-related values. Millitorr is common in vacuum systems because it gives more detail at low pressures. It’s helpful for pump specs, chamber readings, and leak checks.
Millitorr means one-thousandth of a torr.
1 mTorr = 0.001 Torr
Torr is a pressure unit often used for vacuum levels.
Yes. Millitorr is an absolute pressure unit. It measures pressure compared to a perfect vacuum, not compared to local air pressure.
1 mTorr = 0.000001333223684 bar (about 1.333 × 10⁻⁶ bar).
To convert mTorr to bar, multiply by 0.000001333223684.
There are 750,061.683 mTorr in 1 bar.
This is a fixed conversion based on standard pressure unit definitions.
Since 1 mbar = 0.001 bar, then:
1 mbar = 750.061683 mTorr
This is a common conversion in vacuum and pressure gauges.
Small bar values convert to large millitorr values because millitorr is a much smaller unit. Keep enough decimal places in bar to avoid rounding errors.
Example:
0.0005 bar × 750,061.683 = 375.0308415 mTorr
For a rough estimate:
These are close, but not exact.
No. The conversion is a unit change, so it stays the same. Temperature can change the actual pressure in a system, but it doesn’t change how bar converts to millitorr.
Bar is tied to the metric system and is used widely in science and industry. Torr is based on standard atmospheric pressure. Millitorr is often used when pressures drop far below normal air pressure.
Gauge makers choose units based on the field and region. Many vacuum processes use mTorr, while many industrial systems use mbar. Both can describe the same pressure, just in different units.
These ranges are typical:
Exact ranges can vary by industry.
The Calculate Box tool to convert bars to millitorr uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a bars value in the box and have it instantly converted to millitorr.