How many Torr are in one atm?
One standard atmosphere contains exactly 760 Torr.
Convert Torr (Torr) to Standard atmosphere (atm) instantly.
Formula
value × 0.00131578947368
| Sample | Converted |
|---|---|
| 1 Torr | 0.001316 atm |
| 5 Torr | 0.006579 atm |
| 10 Torr | 0.013158 atm |
| 100 Torr | 0.131579 atm |
| 1,000 Torr | 1.315789 atm |
Convert Torr to standard atmospheres by dividing the Torr value by 760. This is an exact definition-based conversion because one Torr is 1/760 of a standard atmosphere.
Torr and atm are directly linked through the definition of standard atmosphere.
This conversion is exact and simple: divide Torr by 760.
A pressure of 1520 Torr equals 2 atm.
Use atm when the pressure should be read as a multiple of standard atmosphere.
Use Torr when the target context is vacuum work, lab reporting, or mercury-column pressure references.
Actual local atmospheric pressure can differ from one atm, so treat atm as a standard reference.
Torr is common in lab and vacuum settings, while atm is common in gas-law and pressure-reference work.
Converting Torr to atm makes it easy to express a pressure as a fraction or multiple of standard atmosphere.
The conversion is exact because of how Torr is defined.
One Torr is 1/760 of one standard atmosphere.
That means 760 Torr equals exactly 1 atm.
This direct relationship makes the conversion reliable and easy to check.
Torr is often used in vacuum and lab equipment.
atm is often used in formulas and teaching examples.
Use whichever unit matches the calculation or equipment documentation.
Definition: A torr is a pressure unit defined as 1/760 of a standard atmosphere.
History/Origin: Torr is named after Evangelista Torricelli and remains associated with mercury-column and vacuum pressure measurement.
Current use: Torr is used in vacuum systems, laboratories, physics, chemistry, pressure gauges, and low-pressure process documentation.
Definition: A standard atmosphere is a pressure unit defined as exactly 101,325 pascals.
History/Origin: The atmosphere unit became useful as a reference for average sea-level air pressure in science and education.
Current use: atm is used in chemistry, gas laws, diving references, laboratory work, classroom problems, and pressure comparisons.
| Torr [Torr] | Standard atmosphere [atm] |
|---|---|
| 0.01 Torr | 0.000013 atm |
| 0.1 Torr | 0.000132 atm |
| 1 Torr | 0.001316 atm |
| 2 Torr | 0.002632 atm |
| 5 Torr | 0.006579 atm |
| 10 Torr | 0.013158 atm |
| 20 Torr | 0.026316 atm |
| 50 Torr | 0.065789 atm |
| 100 Torr | 0.131579 atm |
1 Torr = 0.001316 atm
1 atm = 760 Torr
Formula: value × 0.00131578947368
Example: 15 Torr = 0.019737 atm
Precision note: Use exactly 760 Torr per atm. Preserve decimal values when converting partial-atmosphere pressures.
One standard atmosphere contains exactly 760 Torr.
380 Torr equals 0.5 atm.
Torr is defined as 1/760 of a standard atmosphere.