In 1 millitorr there are 0.001 torrs. Meanwhile in 1 torrs there are 1,000 millitorr. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Torrs to Millitorr calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert millitorr (mTorr) to torr (Torr), use the milli- prefix, which means one-thousandth.
This millitorr to torr conversion works for any pressure value. Divide by 1,000 and keep the same pressure unit type (torr).
Millitorr (mTorr) and torr are units of pressure. The conversion is simple because millitorr is a smaller part of a torr.
1 torr equals 1,000 millitorr.
1 millitorr equals 0.001 torr.
To convert mTorr to torr, divide by 1,000.
Use this formula:
torr = millitorr ÷ 1,000
Examples:
Use the reverse formula:
millitorr = torr × 1,000
Examples:
No. They measure the same type of pressure, but they are not the same size.
Many vacuum systems work at low pressures. Millitorr gives more detail than torr in that range. It lets you report small pressure changes without using long decimals.
They are very close, but not exactly the same. Torr is defined as 1/760 of a standard atmosphere. mmHg depends on gravity and mercury density, so it can vary in strict terms. In most lab and vacuum work, they are treated as equal for practical use.
Torr ties directly to standard atmosphere:
This makes it easy to compare vacuum pressure to normal air pressure.
Here are a few quick conversions:
No. The mTorr to torr conversion is a fixed unit conversion. Temperature can change the pressure in a system, but it doesn't change how the units convert.
Keep the scale in mind: mTorr is 1/1,000 of a torr.
A fast check helps: moving from mTorr to torr should make the number smaller. Moving from torr to mTorr should make it larger.
Common formats include:
Pick one style and use it the same way throughout the report.
The Calculate Box tool to convert millitorr to torrs uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a millitorr value in the box and have it instantly converted to torrs.