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To convert from pascal (Pa) to torr (torr), use the following formula:
Let's convert 5 pascal (Pa) to torr (torr).
Using the formula:
Therefore, 5 pascal (Pa) is equal to torr (torr).
Here are some quick reference conversions from pascal (Pa) to torr (torr):
| pascals | torr |
|---|---|
| 0.000001 Pa | torr |
| 0.001 Pa | torr |
| 0.1 Pa | torr |
| 1 Pa | torr |
| 2 Pa | torr |
| 3 Pa | torr |
| 4 Pa | torr |
| 5 Pa | torr |
| 6 Pa | torr |
| 7 Pa | torr |
| 8 Pa | torr |
| 9 Pa | torr |
| 10 Pa | torr |
| 20 Pa | torr |
| 30 Pa | torr |
| 40 Pa | torr |
| 50 Pa | torr |
| 100 Pa | torr |
| 1000 Pa | torr |
| 10000 Pa | torr |
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A pascal (Pa) is the standard unit of pressure in the International System of Units (SI). It is a derived unit, meaning other base units define it.
The primary pascal definition is one newton of force applied over an area of one square meter (1 Pa = 1 N/m2).
Because a single pascal represents a very small amount of pressure, it is most often seen in multiples.
The most common multiples are the kilopascal (kPa), equal to 1,000 pascals, and the megapascal (MPa), equal to 1,000,000 pascals.
These units are widely used in fields from weather forecasting to material science.
The pascal (Pa) unit is named in honor of Blaise Pascal, a key 17th-century French mathematician, physicist, and inventor.
His groundbreaking work on how fluids behave under pressure (known as hydrodynamics and hydrostatics) and his formulation of Pascal's Law were essential to our modern understanding of pressure.
To understand just how small a single pascal is, here are two real-world examples:
This shows why, for most everyday measurements (like tire pressure or weather), the larger kilopascal (kPa) is much more practical.
A torr (Torr) is a unit of pressure.
It is primarily used to measure a vacuum, or pressures much lower than the air pressure we experience every day.
While the modern standard (SI) unit for pressure is the pascal (Pa), the torr is still widely used in many scientific and engineering fields.
For conversion, one torr is equal to about 133.32 pascals.
A much simpler way to think about it is in relation to our atmosphere: one standard atmosphere (atm) is defined as exactly 760 Torr.
The unit is named in honor of Evangelista Torricelli, the 17th-century Italian physicist who invented the mercury barometer.
Because of this, one torr was initially defined as being equal to one millimeter of mercury (mmHg).
This means 1 Torr is the pressure exerted by a column of mercury that is one millimeter high.
As mentioned, the torr's most convenient relationship is with the standard atmosphere (atm).
One standard atmosphere—the average air pressure at sea level—is set at exactly 760 Torr.
This straightforward, whole-number conversion makes the torr a popular choice for anyone working with fractions of atmospheric pressure.
The torr is the primary unit of measurement for high-vacuum and ultra-high-vacuum technology.
Because it is such a small unit (it takes 760 of them to equal one atmosphere), it is ideal for quantifying pressures far below normal air pressure.
You will find the torr used in many advanced scientific and industrial fields, including: