This converter turns atmospheres into torr instantly, using the exact factor 1 atmosphere = 760 torr. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
Standard atmospheric pressure by definition — 101,325 pascals exactly. One millimetre of mercury, used in vacuum work.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
atmospheres- The amount you are converting, measured in atmospheres
760- The exact number of torr in one atmosphere
torr- The converted result
How it works, step by step
- Enter the number of atmospheres you want to convert.
- The value is multiplied by 760, the exact conversion factor.
- The result is displayed in torr, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 atmospheres
Multiply 5 by 760. That gives 3,800 torr. A quick sanity check: one atmosphere is larger than one torr, so the number should get bigger — and it does.
Converting 72 atmospheres
72 × 760 = 54,720 torr. Working backwards, 54,720 ÷ 760 returns 72 atmospheres, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many torr are in one atmosphere?
Exactly 760. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert atmospheres to torr?
Torr = atmospheres × 760. To reverse it, divide instead: atmospheres = torr ÷ 760, which is the same as multiplying by 0.001315789474.
Is the atmosphere bigger than the torr?
Yes. One atmosphere equals 760 torr, so it is the larger unit.
Why does my answer differ slightly from other atmospheres to torr converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a atmosphere?
Standard atmospheric pressure by definition — 101,325 pascals exactly.
What is a torr?
One millimetre of mercury, used in vacuum work.
Atmospheres to torr reference table
| Atmospheres | Torr |
|---|---|
| 0.5 atm | 380 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 |
| 15 atm | 11,400 Torr |
| 20 atm | 15,200 Torr |
| 25 atm | 19,000 Torr |
| 50 atm | 38,000 Torr |
| 75 atm | 57,000 Torr |
| 100 atm | 76,000 Torr |
| 250 atm | 190,000 Torr |
| 500 atm | 380,000 Torr |
| 1000 atm | 760,000 Torr |
Exact factor: 1 atmosphere = 760 torr. Values rounded for display.