Torr to atm Conversion Calculator
Convert pressure between Torr and atmospheres with precision
Pressure Unit Converter
Enter the pressure value to convert
Converted pressure value
Conversion Result
Using conversion factor: 1 Torr = 1/760 atm
Common Torr to atm Conversions
| Torr | atm | Description |
|---|---|---|
| 760 | 1.000000 | Standard atmospheric pressure |
| 380 | 0.500000 | Half atmosphere |
| 100 | 0.131600 | 100 Torr |
| 1 | 0.001316 | 1 Torr |
| 1520 | 2.000000 | Double atmospheric pressure |
Quick Reference
Pressure Units
Torr
Named after Evangelista Torricelli
atm
Standard atmospheric pressure
mmHg
Millimeters of mercury
Pascal (Pa)
SI unit of pressure
Understanding Torr and Atmosphere Conversions
What is a Torr?
A Torr is a unit of pressure named after the Italian physicist Evangelista Torricelli. One Torr is defined as exactly 1/760 of a standard atmosphere. It's commonly used in vacuum technology and low-pressure applications.
Relationship to mmHg
Torr and mmHg (millimeters of mercury) are nearly identical units:
- •1 Torr = 0.999999857... mmHg
- •For most practical purposes, they are equivalent
Standard Atmosphere (atm)
The standard atmosphere is defined as exactly 101,325 pascals. It represents the average atmospheric pressure at sea level on Earth.
Conversion Formula
atm = Torr ÷ 760
Torr = atm × 760
Example: 800 Torr = 800 ÷ 760 = 1.0526 atm
Common Applications
Vacuum Technology
Torr is commonly used in vacuum applications where pressures are much lower than atmospheric pressure.
Medical Equipment
Blood pressure measurements often use mmHg, which is nearly equivalent to Torr.
Scientific Research
Laboratory equipment specifications often reference both Torr and atmospheric pressure units.