# Convert Kilopascal to Bar

Please provide values below to convert kilopascal [kPa] to bar, or *vice versa*.

### Kilopascal

**Definition:** A kilopascal (symbol: kPa) is a multiple of the pascal (Pa), an SI (International System of Units) derived unit of pressure used to measure internal pressure, Young's modulus, stress, and ultimate tensile strength. A kilopascal is defined as 1,000 Pa, where 1 Pa is defined as the pressure exerted by a 1 newton force applied perpendicularly to an area of one square meter, expressed as 1 N/m^{2} or 1 kg/m·s^{2}.

**History/origin:** The unit, pascal, is named after Blaise Pascal, a French mathematician and physicist. The kilopascal is simply a multiple of the pascal, as is common within SI.

In 1971, at the 14^{th} General Conference on Weights and Measures, the pascal was adopted as an SI derived unit of pressure.

**Current use:** The kilopascal is widely used worldwide in countries that have adopted SI. Exceptions include certain countries that use either the imperial or United States customary systems of measurement, such as the United States, in which the unit of pound per square inch is more commonly used. The kilopascal is more prevalent in scientific contexts such as material science, engineering, and geophysics. This is true of most countries, including the United States.

### Bar

**Definition:** A bar (symbol: bar) is a metric unit of pressure that is defined as exactly 100,000 pascals (symbol: Pa). It is equal to 0.987 atmospheres (101,325 Pa), the unit often used as a reference of standard pressure.

**History/origin:** The unit, bar, was introduced by Vilhelm Bjerknes, a Norwegian meteorologist who founded modern weather forecasting. The term "bar" comes from the Greek word "baros," which means weight.

**Current use:** Although the bar is a metric unit of pressure, it is not accepted within the International System of Units (SI) and is even deprecated within certain fields. The International Bureau of Weights and Measures has specified the bar as a unit that authors should have the freedom to use but has chosen not to include the bar in the list of non-SI units accepted for use with SI.

Millibars (symbol: mb) are also commonly used when referencing atmospheric air pressure, where atmospheric pressure equals 1013.25 mbar (101.325 kPa). Meteorologists and weather reporters worldwide often use this unit for convenience, since working in pascals would result in much larger values.

### Kilopascal to Bar Conversion Table

Kilopascal [kPa] | Bar |
---|---|

0.01 kPa | 0.0001 bar |

0.1 kPa | 0.001 bar |

1 kPa | 0.01 bar |

2 kPa | 0.02 bar |

3 kPa | 0.03 bar |

5 kPa | 0.05 bar |

10 kPa | 0.1 bar |

20 kPa | 0.2 bar |

50 kPa | 0.5 bar |

100 kPa | 1 bar |

1000 kPa | 10 bar |

### How to Convert Kilopascal to Bar

1 kPa = 0.01 bar

1 bar = 100 kPa

**Example:** convert 15 kPa to bar:

15 kPa = 15 × 0.01 bar = 0.15 bar