Convert Atmospheres to Torr
Convert Atmospheres to Torr instantly. 1 Atmosphere (atm) equals 760 Torr (Torr).
Atmospheres to Torr conversion table
| Atmospheres (atm) | Torr (Torr) |
|---|---|
| 1 atm | 760 Torr |
| 2 atm | 1,520 Torr |
| 3 atm | 2,280 Torr |
| 5 atm | 3,800 Torr |
| 10 atm | 7,600 Torr |
| 20 atm | 15,200 Torr |
| 50 atm | 38,000 Torr |
| 100 atm | 76,000 Torr |
| 500 atm | 380,000 Torr |
| 1,000 atm | 760,000 Torr |
1 Atmosphere = 760 Torr · multiply Atmospheres by 760
About converting Atmospheres to Torr
Atmospheres (atm) and Torr (Torr) are both units of pressure, so converting between them is a single multiplication: multiply your Atmospheres figure by 760. Ten Atmospheres comes to 7,600 Torr, and a hundred works out at 76,000 Torr.
Rule of thumb: going from Atmospheres to Torr multiplies, so the figure always grows — one Atmosphere is already 760 Torr. If your answer came out smaller, you have the conversion the wrong way round.
What is an Atmosphere?
The standard atmosphere is a defined reference rather than a working unit: a figure fixed by agreement at roughly what the air presses at sea level on an ordinary day. Nobody sets a gauge to it. Instead it is the yardstick other pressures are described against — divers count depth in atmospheres, chemists specify reactions at one atmosphere, and test standards quote pressures as multiples of it. Because it is a defined number rather than a measured one, the real pressure outside almost never equals exactly one atmosphere; it wanders with the weather, which is what a barometer is telling you.
What is a Torr?
The torr is named after Evangelista Torricelli, who invented the mercury barometer and in the process produced the first sustained vacuum anyone had made. The unit fits that legacy exactly: it is very nearly the pressure of one millimetre of mercury, and it is still the working unit of vacuum technology, where gauges read in torr and in decimal fractions of it. Its most familiar relative is not in a laboratory at all — blood pressure is quoted in millimetres of mercury, essentially the same size, so a reading of 120 over 80 is a pressure measurement in all but name.
To put both in perspective: the pressure 10 metres underwater is about 2 atmospheres, while a rough vacuum pump pulls down to about 0.1 torr.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Torr to Atmospheres converter, or browse all Pressure converters.
Frequently asked questions
How many Torr are in one Atmosphere?
There are 760 Torr in one Atmosphere.
How do I convert Atmospheres to Torr?
Multiply the number of Atmospheres by 760. For example, 10 Atmospheres = 7,600 Torr.
What is 100 Atmospheres in Torr?
100 Atmospheres is equal to 76,000 Torr.
How do I convert Torr to Atmospheres?
Multiply the Torr value by 0.001316 (or divide by 760).
Is this Atmospheres to Torr conversion exact?
The definition is exact — Atmospheres and Torr are both fixed against the same base by international agreement — but the decimal shown here is rounded for readability, because the true ratio does not terminate. For engineering or scientific work, carry more decimal places than this page displays.
What is an Atmosphere?
The standard atmosphere is a defined reference rather than a working unit: a figure fixed by agreement at roughly what the air presses at sea level on an ordinary day. Nobody sets a gauge to it. Instead it is the yardstick other pressures are described against — divers count depth in atmospheres, chemists specify reactions at one atmosphere, and test standards quote pressures as multiples of it. Because it is a defined number rather than a measured one, the real pressure outside almost never equals exactly one atmosphere; it wanders with the weather, which is what a barometer is telling you.
What is a Torr?
The torr is named after Evangelista Torricelli, who invented the mercury barometer and in the process produced the first sustained vacuum anyone had made. The unit fits that legacy exactly: it is very nearly the pressure of one millimetre of mercury, and it is still the working unit of vacuum technology, where gauges read in torr and in decimal fractions of it. Its most familiar relative is not in a laboratory at all — blood pressure is quoted in millimetres of mercury, essentially the same size, so a reading of 120 over 80 is a pressure measurement in all but name.