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bar

Non-SI unit of pressure

Entityunit of pressure UCUM derived unit non-SI unitQ103510

Also known as bar (pressure)

Instance of: unit of pressure
, UCUM derived unit
, non-SI unit

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

The bar is a metric unit of pressure defined as 100000 Pa, though not part of the International System of Units (SI). A pressure of 1 bar is slightly less than the average atmospheric pressure on Earth at sea level. By the barometric formula, 1 bar is roughly the atmospheric pressure on Earth at an altitude of 111 metres at 15 °C.

Overview

All data

40 statements · 13% with external sources · numbers in brackets are citations

Conversion to SI unit: 100,000 Pa
Measured physical quantity: pressure
Conversion to standard unit: 100,000 Pa
14.5038 pound per square inch
0.9869 standard atmosphere
29.53 inch of mercury
401.4631 inch of water
10,197.16 millimetre of water
750.0616 millimetre of mercury
2,088.54 Psf
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10,197.16 kilogram-force per square metre
1,000 millibar
1
Sources
1.Stated in Q43451968
View statement on Wikidata ↗
Unit symbol: bar
1
Sources
1.Stated in Logopedia
View statement on Wikidata ↗
бар
Different from: Bar

On other databases

24 identifiers linking bar across the web's reference databases

Data quality

statements

13%

externally sourced

Source last edited July 21, 2026. AIDB refreshes this page daily.

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AIDB. (2026). bar (Q103510). Retrieved from https://aidb.si/e/bar-Q103510