What is a torr to pascals converter?
A torr to pascals converter is an online tool that translates a pressure value expressed in torr into its equivalent in pascals (Pa), and the other way around. The torr is a non-SI unit historically tied to the height of a mercury column, while the pascal is the SI unit of pressure. Because vacuum gauges, barometers, and laboratory equipment are often calibrated in different units, having a fast and reliable way to move between torr and pascals removes guesswork and prevents costly mistakes.
The two units describe the same physical quantity—force distributed over an area—just on different scales. One torr is roughly 133 times larger than one pascal, so torr readings produce comparatively large pascal numbers.
How it works
The conversion is a simple proportional relationship anchored to a fixed factor. By definition, one standard atmosphere equals exactly 760 torr and approximately 101,325 pascals. Dividing those two figures gives the conversion constant used here: 1 torr = 133.322 Pa.
To go from torr to pascals, multiply by 133.322. To go from pascals back to torr, divide by 133.322 (equivalently, multiply by about 0.0075006). The converter does this both ways automatically: type a value into either field and the other side updates immediately.
Formula
To convert torr to pascals:
To convert pascals to torr:
Torr to pascals conversion table
The table below lists common torr values alongside their pascal equivalents using the factor 133.322.
| Torr | Pascals (Pa) |
|---|---|
| 1 | 133.322 |
| 2 | 266.644 |
| 5 | 666.61 |
| 10 | 1333.22 |
| 20 | 2666.44 |
| 50 | 6666.10 |
| 100 | 13332.20 |
| 500 | 66661.00 |
| 760 | 101324.72 |
| 1000 | 133322.00 |
Examples
Example 1: A single torr
Convert 1 torr to pascals using the conversion factor:
So one torr is just over 133 pascals.
Example 2: One atmosphere
A standard atmosphere is defined as 760 torr. Converting that to pascals shows why the atmosphere and the pascal line up so closely:
The result is almost exactly 101,325 Pa, the accepted value for standard atmospheric pressure.
Example 3: Pascals back to torr
Suppose a sensor reports 13332.2 Pa and you need the value in torr. Divide by the conversion factor:
A reading of 13,332.2 pascals corresponds to exactly 100 torr.
Notes
- The factor 133.322 follows from the definitions 1 atm = 760 torr = 101,325 Pa. Some references quote 133.3224 Pa for extra precision; the difference is negligible for everyday work.
- One torr is very nearly equal to one millimetre of mercury (mmHg). The two units differ by less than a part in seven million, so they are interchangeable in most practical contexts.
- Pascals are small units, so torr values often produce large pascal numbers. For high pressures it is common to use kilopascals (1 kPa = 1000 Pa).
- Torr is widely used in vacuum technology, where pressures are reported far below one atmosphere.
Frequently asked questions
How many pascals are in 1 torr?
One torr equals 133.322 pascals. Multiply any torr value by 133.322 to obtain the equivalent in pascals.
How do I convert pascals to torr?
Divide the pressure in pascals by 133.322. For example, 13332.2 Pa divided by 133.322 equals 100 torr.
Is torr the same as mmHg?
They are nearly identical. One torr is defined from the standard atmosphere, while one millimetre of mercury is defined from the density of mercury and gravity. The two values agree to within about one part in seven million, so they are treated as equal in everyday use.
Why is 760 torr equal to atmospheric pressure?
By definition, one standard atmosphere is 760 torr. This stems from the historical use of a 760 mm mercury column to measure normal sea-level air pressure, which is about 101,325 Pa.
What is a pascal?
A pascal is the SI unit of pressure, equal to one newton of force applied over one square metre. It is a relatively small unit, which is why pressures are often expressed in kilopascals (kPa) or megapascals (MPa).
Can this converter handle decimal values?
Yes. You can enter any decimal value into either field, and the converter returns the precise equivalent without rounding off your input.