Atmospheres to Torr Converter
Enter the pressure in atmospheres below to convert it to torr.
Convert Atmospheres to Torr
Enter a value in atmospheres (atm) to convert to torr (Torr).
Standard Atmosphere to Torr Conversion Table
Table showing various standard atmosphere measurements converted to torr. Click any preset value or arrow to load it into the converter.
| Atmospheres (atm) | Torr (Torr) |
|---|---|
| 1 atm | 760 Torr |
| 2 atm | 1,520 Torr |
| 2.5 atm | 1,900 Torr |
| 5 atm | 3,800 Torr |
| 10 atm | 7,600 Torr |
| 15 atm | 11,400 Torr |
| 20 atm | 15,200 Torr |
| 25 atm | 19,000 Torr |
| 30 atm | 22,800 Torr |
| 50 atm | 38,000 Torr |
How to Convert Atmospheres to Torr
To convert atmospheres to torr, multiply the pressure by the following conversion ratio: 760 torr/standard atmosphere.
Since one standard atmosphere is equal to 760 torr, you can use this simple formula to convert:
The pressure in torr is equal to the pressure in atmospheres multiplied by 760.
For example, here's how to convert 5 atmospheres to torr using the formula above.
How Many Torr Are in a Standard Atmosphere?
There are 760 torr in a standard atmosphere, which is why we use this value in the formula above.
Our standard atmosphere to torr calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Atmospheres and torr are both units used to measure pressure. Keep reading to learn more about each unit.
What Is a Standard Atmosphere?
A standard atmosphere is a unit of pressure equal to 101,325 pascals (Pa), the base unit for pressure. Standard sea-level atmospheric pressure defined as 101,325 Pascals. [1]
The standard atmosphere is classified as a standard unit of pressure. Atmospheres can be abbreviated as atm; for example, 1 standard atmosphere can be written as 1 atm.
When working with atmospheres (atm) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, atmospheres (atm) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within international standard workflows, engineering documentation, and technical data sheets.
What Is a Torr?
A torr is a unit of pressure equal to 133.3223684 pascals (Pa), the base unit for pressure. 1/760 of a standard atmosphere (133.3224 Pascals). [2]
The torr is classified as a standard unit of pressure. Torr can be abbreviated as Torr; for example, 1 torr can be written as 1 Torr.
When working with torr (Torr) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, torr (Torr) are widely used across standard pressure applications within international standard workflows, engineering documentation, and technical data sheets.
When converting pressure between atmospheres (atm) and torr (Torr), keep full floating-point precision (1 atm = 760 Torr; 1 Torr = 0.0013158 atm) during intermediate calculations and round only the final torr figure to match your instrument tolerance.
More Standard Atmosphere & Torr Conversions
Need to calculate in the opposite direction? Use our torr to atmospheres converter (Torr to atm) to switch your starting unit immediately. You can also explore related tools such as converting atmospheres to bars, converting atmospheres to psi, or converting psi to bars.
Convert from Atmospheres
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — Atmospheres (atm) to Torr (Torr)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Standard Atmosphere (atm) & Torr (mmHg) (Torr)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (atm to Torr)