Torr to Atm Conversion
This is the
atm conversion calculator - a great tool that helps you convert torrs to atms (standard atmospheres). It also works the other way around, enabling
You'll find the torr's unit definition and the relationships between
mmHg, and many other pressure units in the article. You'll see how easy it is to move from
atm and vice versa in a millisecond.
What is the atmospheric pressure in torrs? How many torrs are in
1 atm? How many
mmHg are in
1 atm? - If you've ever asked one of these questions, this is the right place to get the answer!
Torr unit - Is Torr equivalent to mmHg?
Let's start from the basic definition - a torr is the unit of pressure. One
Torr is precisely
1/760 of a standard atmosphere,
atm. The name comes from Evangelista Torricelli, who was an Italian physicist and mathematician and was a pioneer of pressure measurements.
Historically, the first barometers consisted of mercury (Hg) inside a vertical glass, so the natural pressure unit was
mm Hg), millimeter of mercury.
mmHg are almost the same units. So how to convert
1 Torr = 0.9999998575337… mmHg.
For completeness, here is how to move from
Torr as well:
1 mmHg = 1.0000001424663203… Torr.
If we accept the accuracy of up to 6 significant figures, we can assume there is no difference between
1 Torr and
How many torrs are in 1 atm?
According to the previous section's definition, there are exactly
760 torrs in one standard atmosphere (as one
Torr is precisely
1/760 of one
We can always convert this fraction to decimal, so the
Torr conversion factor equals
0.00131578947…. As you can see, using the fraction form is more convenient and prevents losing precision during computations.
The good thing is that you can also use our Torr to atm conversion as an atm to Torr conversion. Moreover, you can even change the units yourself to make it an
So what about
atm conversion? What are the numbers here?
1 mmHg = 0.00131578966… atm; or
1 mmHg = 1/759.99989157… atm.
And if you want to know how many
mmHg are in
1 atm, then the answer is:
1 atm = 759.99989157… mmHg.
How to convert Torr to atm using Torr to atm conversion?
Our tool is as simple as it could be! Assuming you want to convert
800 Torr to
atm, these are the steps you should follow:
800in the field with
800by the convertion factor,
800 Torr * 1/760 = 1.0526 atm; and
That's all! The answer is
And what if you want to convert the pressure of
2.5 atmospheric pressure to torrs? Analogically:
2.5 atminto the second field;
Read that your value is equivalent to
Whenever you want to use technical atmospheres instead of standard ones or
mmHg instead of
Torr, simply change the units with just one click!
Torr to other pressure units list
mmHg are not the only pressure units we are commonly using. There are others, both metric and imperial units, such as pascals (
Pa) or pounds per square inch (
psi), to mention a few.
If you deal with a task of a Torr to other unit conversions, here are some of the examples (rounded to six decimal places):
1 Torr ≈ 133.322368 Pa;
1 Torr ≈ 1.333223 hPa;
1 Torr ≈ 0.133322 kPa;
1 Torr ≈ 0.019337 psi;
1 Torr ≈ 2.784437 lbs/ft²;
1 Torr ≈ 0.001333 bar;
1 Torr ≈ 0.001359 at;
1 Torr ≈ 0.039370 in Hg;
1 Torr ≈ 1.359510 cm H₂O.