Convert Torr to Atmosphere
Use this free converter to change torr (Torr) into atmospheres (atm). Torr and atmosphere both measure pressure. As a quick reference, 1 Torr equals 0.0013157895 atm, and 1 atm equals 760 Torr.
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Atmosphere (atm)
0.0013157895
1 Torr = 0.0013157895 atm
Pressure conversion table
| Torr | Atmosphere |
|---|---|
| 0.01 | 0.000013157895 |
| 0.1 | 0.00013157895 |
| 0.5 | 0.00065789473 |
| 1 | 0.0013157895 |
| 2 | 0.0026315789 |
| 3 | 0.0039473684 |
| 5 | 0.0065789473 |
| 10 | 0.013157895 |
| 20 | 0.026315789 |
| 25 | 0.032894737 |
| 50 | 0.065789473 |
| 100 | 0.13157895 |
| 1,000 | 1.3157895 |
How to convert Torr to Atmosphere
Multiply the torr value by 0.0013157895 to get atmospheres.
- Enter the number of torr you want to convert.
- The converter instantly shows the equivalent value in atmospheres.
- Worked example: 15 Torr × 0.0013157895 = 0.019736842 atm.
- Use the swap button to reverse the conversion (atmosphere to torr).
About these units
Torr (Torr)
- Definition
- A torr is a pressure unit equal to 1/760 of a standard atmosphere, about 133.3 pascals.
- History
- Named after Evangelista Torricelli, inventor of the barometer, it equals roughly one millimeter of mercury.
- Current use
- Torr is used in vacuum technology and laboratory science.
Atmosphere (atm)
- Definition
- A standard atmosphere (atm) is defined as exactly 101,325 pascals, roughly average sea-level pressure.
- History
- It was standardised as a reference pressure for scientific work.
- Current use
- Atmospheres are used in chemistry, physics, and diving as a reference pressure.
Frequently asked questions
How many atmospheres are in a torr?
There are 0.0013157895 atm in 1 Torr. To convert, multiply the number of torr by 0.0013157895.
How do I convert torr to atmospheres?
Multiply the torr value by 0.0013157895 to get atmospheres. For example, 10 Torr = 0.013157895 atm.
Is this torr-to-atmosphere converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Torr to other pressure units
| Unit | 1 Torr equals |
|---|---|
| Pascal (Pa) | 133.32237 Pa |
| Kilopascal (kPa) | 0.13332237 kPa |
| Bar (bar) | 0.0013332237 bar |
| Pound per Square Inch (psi) | 0.019336775 psi |
| Atmosphere (atm) | 0.0013157895 atm |
| Millibar (mbar) | 1.3332237 mbar |