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Single conversion
To convert from pascal (Pa) to bar (bar), use the following formula:
Let's convert 5 pascal (Pa) to bar (bar).
Using the formula:
Therefore, 5 pascal (Pa) is equal to bar (bar).
Here are some quick reference conversions from pascal (Pa) to bar (bar):
| pascals | bar |
|---|---|
| 0.000001 Pa | bar |
| 0.001 Pa | bar |
| 0.1 Pa | bar |
| 1 Pa | bar |
| 2 Pa | bar |
| 3 Pa | bar |
| 4 Pa | bar |
| 5 Pa | bar |
| 6 Pa | bar |
| 7 Pa | bar |
| 8 Pa | bar |
| 9 Pa | bar |
| 10 Pa | bar |
| 20 Pa | bar |
| 30 Pa | bar |
| 40 Pa | bar |
| 50 Pa | bar |
| 100 Pa | bar |
| 1000 Pa | bar |
| 10000 Pa | bar |
For all Pressure converters, choose units using the From/To dropdowns above.
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.
The bar is a metric unit of pressure.
It is defined as exactly 100 kilopascals (kPa), or 100,000 Pascals (Pa).
Although it is not an official part of the International System of Units (SI), it is widely accepted for use with the SI. The bar is a popular unit for measuring pressure because it is very close to the average atmospheric pressure on Earth at sea level.
The term "bar" comes from the Greek word βάρος (baros), which means "weight."
The unit was introduced by British meteorologist William Napier Shaw in 1909. It is still widely used in meteorology, oceanography, and engineering.
A common point of confusion is the difference between a bar and a standard atmosphere (atm).
While they are very close in value, they are not the same:
This means 1 bar is approximately equal to 0.987 atm. Because it's so close to atmospheric pressure and is a round number (100 kPa), the bar is a very convenient unit for many applications.
The bar is a versatile unit used to measure pressure in many industrial and everyday contexts.
Common examples include: