Whether you are working in a laboratory, studying fluid mechanics, or calibrating vacuum equipment, converting Torr to atmospheres (atm) requires precision. Use our free online calculator below for instant, accurate results.
Torr to atm Converter
How to Convert Torr to atm
The relationship between Torr and standard atmospheres is defined by the standard atmospheric pressure at sea level. One standard atmosphere is exactly equal to 760 Torr (or 760 mmHg).
The Formula
To convert Torr to atm, use the following division formula:
atm = Torr ÷ 760
Conversely, if you need to convert from atm to Torr, you simply multiply the atmosphere value by 760.
Step-by-Step Conversion Examples
Understanding the math behind the converter helps ensure your manual calculations are correct. Here are some common pressure conversion scenarios:
- Convert 760 Torr to atm: 760 / 760 = 1 atm (Standard pressure at sea level).
- Convert 380 Torr to atm: 380 / 760 = 0.5 atm.
- Convert 1 Torr to atm: 1 / 760 = 0.00131579 atm.
- Convert 1000 Torr to atm: 1000 / 760 = 1.3158 atm.
Torr to Atmosphere Conversion Table
This quick-reference chart provides common pressure values used in science and engineering.
| 760 torr to atm = 1 atm |
| 750 torr to atm = 0.987 atm |
| 1 torr to atm = 0.00132 atm |
| 745 torr to atm = 0.980 atm |
| 720 torr to atm = 0.947 atm |
| 755 torr to atm = 0.993 atm |
| 200 torr to atm = 0.263 atm |
| 780 torr to atm = 1.026 atm |
| 765 torr to atm = 1.007 atm |
| 650 torr to atm = 0.855 atm |
Is 1 Torr equal to 1 mmHg?
For most practical purposes, yes. 1 Torr is defined as 1/760 of a standard atmosphere, while 1 mmHg is the pressure exerted by a 1mm column of mercury. The difference between them is less than 0.000015%, making them interchangeable in most laboratory settings.
What is the atmospheric pressure in Torr at sea level?
At sea level, the standard atmospheric pressure is exactly 760 Torr.
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