How Many Torr in an Atmosphere?
Quick Answer
There are exactly 760 torr in one standard atmosphere.
1 atm = 760 torr = 760 mmHg
Understanding the Conversion
One standard atmosphere (atm) equals exactly 760 torr (or mmHg at 0°C). The torr is named after Evangelista Torricelli, who invented the mercury barometer in 1644. Blood pressure is measured in mmHg; 120/80 mmHg = 120/80 torr.
Formula
1 atm = 760 torr = 760 mmHg
Common Examples
| Description | Value |
|---|---|
| Normal blood pressure (120 mmHg) | 120 torr = 0.158 atm |
| Vacuum pump at 10 torr | 1.3% of atmospheric pressure |
| Summit of Everest (253 torr) | ≈0.333 atm |
Quick Reference Table
Use this table for quick conversions between atmosphere and torr:
| atmosphere | torr |
|---|---|
| 1 | 760 |
| 2 | 1,520 |
| 5 | 3,800 |
| 10 | 7,600 |
| 25 | 19,000 |
| 50 | 38,000 |
| 100 | 76,000 |
Frequently Asked Questions
How Many Torr in an Atmosphere?
There are exactly 760 torr in one standard atmosphere. One standard atmosphere (atm) equals exactly 760 torr (or mmHg at 0°C). The torr is named after Evangelista Torricelli, who invented the mercury barometer in 1644. Blood pressure is measured in mmHg; 120/80 mmHg = 120/80 torr.
What is the formula to convert atmosphere to torr?
The formula is: 1 atm = 760 torr = 760 mmHg. To convert, multiply the number of atmospheres by 760 to get the equivalent in torr.
How do I convert torr to atmosphere?
To convert torr to atmosphere, divide the number of torr by 760. For example, 3,800 torr equals 5 atmospheres.