Vacuum
atmtoTorr
Convert standard atmospheres (vacuum) (atm) to torr (vacuum) (Torr).
Factor1 atm = 760 Torr
Converter
atm
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Torr
Rendered to 6 significant figures.
Formula
Formula
Torr = atm × 760
Multiply any value in standard atmospheres (vacuum) by 760 to obtain the value in torr (vacuum).
Worked example
Convert 1 atm to Torr.
- 01Start with 1 atm.
- 02Multiply by the conversion factor: 1 × 760 = 760 Torr.
Result1 atm = 760 Torr
Conversion table
| atm | Torr |
|---|---|
| 1 | 760 |
| 2 | 1520 |
| 5 | 3800 |
| 10 | 7600 |
| 20 | 15200 |
| 50 | 38000 |
| 100 | 76000 |
| 200 | 1.5200e+5 |
| 500 | 3.8000e+5 |
| 1000 | 7.6000e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from atm to Torr?
1 atm equals 760 Torr. To convert, multiply the value in standard atmospheres (vacuum) by 760.
How do I convert 1 atm to Torr?
1 atm = 760 Torr. For any value, multiply by 760.
How do I convert Torr back to atm?
Divide by the same factor — or equivalently, multiply by 0.001315789. So 1 Torr = 0.00131579 atm.
When would I need to convert standard atmosphere (vacuum) to torr (vacuum)?
Vacuum-pressure conversions between atm and Torr are common in vacuum-chamber instrumentation, pump-down endpoint specification, semiconductor and deposition process work, freeze-drying, electron-microscopy column pressure, vacuum metallurgy and HVAC / refrigeration service. Torr, mmHg and inHg dominate manometric vacuum gauges; mbar is standard on European instruments; micron Hg and mTorr cover high-vacuum work; Pa and kPa are the SI references. This category is vacuum / instrumentation intent — dimensionally the same as pressure, but kept separate so process-pressure searches and vacuum searches stay on the right page.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).