Torr to atm Converter
Convert between Torr, atmospheres, and other pressure units
Different pressure units are used in various scientific and engineering applications:
- Torr: Named after Evangelista Torricelli, used primarily in vacuum technology and scientific measurements.
- Atmosphere (atm): Based on average atmospheric pressure at sea level (1 atm = 760 Torr).
- Millimeters of Mercury (mmHg): Historically used in meteorology and medical applications, equivalent to Torr.
- Other Units: Include Pascal (Pa), bar, and PSI, each common in different industries and regions.
Key conversion relationships between pressure units:
- 1 Torr = 1 mmHg (exactly)
- 1 atm = 760 Torr
- 1 Torr = 0.00131579 atm
- 1 Torr = 133.322 Pascal
- 1 Torr = 0.00133322 bar
- 1 Torr = 0.0193368 PSI
These conversions are based on standard conditions and are used in scientific and engineering calculations worldwide.
Torr and atmospheric pressure units are used in various fields:
- Vacuum Technology: Measuring and monitoring vacuum systems
- Scientific Research: Laboratory experiments and measurements
- Medical Equipment: Blood pressure measurements and medical devices
- Meteorology: Atmospheric pressure measurements
- Industrial Processes: Vacuum distillation and processing
- Remember that Torr and mmHg are equivalent units
- Use appropriate precision for your application - vacuum measurements often require more decimal places
- Consider the context of your measurement when choosing units
- Be aware of absolute vs. gauge pressure in your measurements
- Double-check critical conversions, especially in scientific or medical applications
Why are there so many pressure units?
Different pressure units evolved from various historical contexts and practical applications. Torr and mmHg came from mercury barometers, while atmospheric pressure became a natural reference point for many measurements.
What is the difference between Torr and mmHg?
There is no difference - Torr and millimeters of mercury (mmHg) are exactly the same unit. The term "Torr" was introduced to honor Torricelli, who invented the mercury barometer.
When should I use Torr instead of other units?
Torr is commonly used in vacuum technology and scientific applications, particularly when measuring pressures below atmospheric pressure. It's especially useful in ranges from high vacuum to rough vacuum (10⁻³ to 760 Torr).