Convert Torr to Atmospheres (atm)
Enter a value below to convert Torr to Atmospheres (atm).
Conversion:
1 Torr = 0.0013157858377 Atmospheres (atm)
How to Convert Torr to Atmospheres (atm)
1 torr = 0.0013157858377 atm
1 atm = 760.00210018 torr
Example: convert 15 Torr to Atmospheres (atm):
25 torr = 0.032894645941 atm
Torr to Atmospheres (atm) Conversion Table
| Torr | Atmospheres (atm) |
|---|---|
| 0.01 torr | 0.000013157858377 atm |
| 0.1 torr | 0.00013157858377 atm |
| 1 torr | 0.0013157858377 atm |
| 2 torr | 0.0026315716753 atm |
| 3 torr | 0.003947357513 atm |
| 5 torr | 0.0065789291883 atm |
| 10 torr | 0.013157858377 atm |
| 20 torr | 0.026315716753 atm |
| 50 torr | 0.065789291883 atm |
| 100 torr | 0.13157858377 atm |
| 1000 torr | 1.3157858377 atm |
Torr
Definition
A torr is a unit of pressure equal to 1/760 of a standard atmosphere, or approximately 133.322 pascals. It is nearly equivalent to one millimeter of mercury (mmHg).
History
The torr was named after Evangelista Torricelli, the Italian physicist who invented the mercury barometer in 1644. It was defined to provide a convenient way to express vacuum and low-pressure measurements.
Current use
Torr is widely used in vacuum science, semiconductor manufacturing, and laboratory settings for measuring low pressures. It remains a standard unit in physics and materials processing.
Atmospheres (atm)
Definition
A standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 pascals. It represents the average atmospheric pressure at sea level.
History
The standard atmosphere was defined in 1954 as a reference standard for pressure. It was historically based on mercury barometer readings and the average weight of the Earth's atmosphere at sea level.
Current use
Atmospheres are used in chemistry (standard conditions for gas calculations), diving (dive depth pressure ratings), and as a reference point for comparing relative pressures across different systems.