Convert Torr (Torr) to Atmospheres (atm)
Switching between Torr and atm is a frequent Pressure task. To do it, simply divide the value by 760.0021.
Formula
1 Torr = 0.001316 atm
To convert Torr to atm, divide the value by 760.0021.
Conversion Table
| Torr (Torr) | Atmospheres (atm) |
|---|---|
| 0.01 Torr | 0 atm |
| 0.1 Torr | 0.0001 atm |
| 0.5 Torr | 0.0007 atm |
| 1 Torr | 0.0013 atm |
| 2 Torr | 0.0026 atm |
| 3 Torr | 0.0039 atm |
| 5 Torr | 0.0066 atm |
| 10 Torr | 0.0132 atm |
| 15 Torr | 0.0197 atm |
| 20 Torr | 0.0263 atm |
| 25 Torr | 0.0329 atm |
| 50 Torr | 0.0658 atm |
| 100 Torr | 0.1316 atm |
| 250 Torr | 0.3289 atm |
| 500 Torr | 0.6579 atm |
| 1000 Torr | 1.3158 atm |
| 2500 Torr | 3.2895 atm |
| 5000 Torr | 6.5789 atm |
| 10000 Torr | 13.1579 atm |
| 50000 Torr | 65.7893 atm |
Common Torr to atm Examples
- 1 Torr = 0.0013 atm
- 5 Torr = 0.0066 atm
- 10 Torr = 0.0132 atm
- 25 Torr = 0.0329 atm
- 50 Torr = 0.0658 atm
- 100 Torr = 0.1316 atm
- 500 Torr = 0.6579 atm
- 1000 Torr = 1.3158 atm
About the units
Torr (Torr) — The torr (1/760 atm ≈ 1 mmHg) is the vacuum engineer’s unit, named after Torricelli, inventor of the barometer. Vacuum-chamber specs are quoted in torr or millitorr.
Frequently Asked Questions
What should I check before trusting a Torr to atm result?
Confirm the input value, the unit direction (Torr to atm, not the reverse), and that the formula 1 Torr = 0.001316 atm has been applied.
How do Torr and atm compare in size?
Compare them through the ratio: 1 Torr equals 0.001316 atm, which shows directly which unit represents a larger amount of Pressure.
What is a quick way to estimate Torr to atm?
Round 0.001316 to one or two significant digits and multiply mentally. Use the exact factor when accuracy matters.
Is there a shortcut for converting Torr to atm?
The shortest route is the formula itself: 1 Torr = 0.001316 atm. Memorizing this single line covers every case.
Why is the conversion factor between Torr and atm 0.001316?
It comes from the official definitions of both Pressure units, which are anchored to internationally agreed reference standards.
Can I convert large numbers of Torr to atm at once?
Yes. The same ratio 0.001316 applies to any value, whether it is a fraction or millions of Torr.