Convert Bar to Kilopascals Instantly
Use this Bar to kPa converter to convert pressure from bar into kilopascals with exact, instant results. Enter any positive or decimal bar value to see kPa plus pascals, megapascals, psi and atmospheres, or switch to the reverse calculator when your starting pressure is already in kilopascals.
Convert bar to kilopascals, reverse kPa to bar, compare bar across common pressure units, or convert any supported pressure value through one multi-unit calculator.
Enter pressure in bar to calculate the equivalent pressure in kilopascals and other common units.
Decimals are supported, such as 0.8, 1.2 or 2.75 bar.
Reverse the conversion by dividing kilopascals by 100.
Compare one bar value across several engineering, automotive and scientific pressure units.
Enter one pressure value and choose its unit to convert between bar, kPa, MPa, Pa, psi and standard atmospheres.
The conversion from bar to kPa is one of the simplest pressure conversions because the relationship is exact and based directly on the pascal. One bar is defined as 100,000 pascals, while one kilopascal equals 1,000 pascals. Dividing 100,000 Pa by 1,000 Pa per kPa gives exactly 100 kPa in one bar.
To convert bar to kilopascals manually, multiply the number of bar by 100. This works for whole numbers, fractions and decimal values. For example, 2 bar equals 200 kPa, 1.5 bar equals 150 kPa, and 0.75 bar equals 75 kPa.
Example: 2.5 bar × 100 = 250 kPa.
Example: 350 kPa ÷ 100 = 3.5 bar.
Because the conversion factor is exactly 100, moving between these units does not require a rounded constant. Rounding is only necessary when the original measurement itself contains limited precision or when you choose to display fewer decimal places.
The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square metre. The kilopascal is 1,000 pascals and the megapascal is 1,000,000 pascals. The bar is not an SI unit, but it is widely used in engineering, weather-related pressure discussions, industrial systems, hydraulic equipment, compressed gases, pumps and vehicle applications.
For authoritative unit definitions and SI guidance, see the BIPM SI Brochure and the NIST guidance on pressure units.
Use this pressure conversion chart for common values. Every entry uses the exact relationship 1 bar = 100 kPa. The extra columns make it easier to compare the same pressure in megapascals and psi.
| Bar | Kilopascals (kPa) | Megapascals (MPa) | psi |
|---|---|---|---|
| 0.01 bar | 1 kPa | 0.001 MPa | 0.1450 psi |
| 0.1 bar | 10 kPa | 0.01 MPa | 1.4504 psi |
| 0.25 bar | 25 kPa | 0.025 MPa | 3.6259 psi |
| 0.5 bar | 50 kPa | 0.05 MPa | 7.2519 psi |
| 0.75 bar | 75 kPa | 0.075 MPa | 10.8778 psi |
| 1 bar | 100 kPa | 0.1 MPa | 14.5038 psi |
| 1.2 bar | 120 kPa | 0.12 MPa | 17.4045 psi |
| 1.5 bar | 150 kPa | 0.15 MPa | 21.7557 psi |
| 2 bar | 200 kPa | 0.2 MPa | 29.0075 psi |
| 2.5 bar | 250 kPa | 0.25 MPa | 36.2594 psi |
| 3 bar | 300 kPa | 0.3 MPa | 43.5113 psi |
| 4 bar | 400 kPa | 0.4 MPa | 58.0151 psi |
| 5 bar | 500 kPa | 0.5 MPa | 72.5189 psi |
| 10 bar | 1,000 kPa | 1 MPa | 145.0377 psi |
| 20 bar | 2,000 kPa | 2 MPa | 290.0755 psi |
| 50 bar | 5,000 kPa | 5 MPa | 725.1887 psi |
| 100 bar | 10,000 kPa | 10 MPa | 1,450.3774 psi |
0.8 × 100 = 80 kPa.
1.2 × 100 = 120 kPa.
2.5 × 100 = 250 kPa.
6 × 100 = 600 kPa.
Multiply 1.8 by 100. The result is 180 kPa. This level of pressure may appear in equipment specifications, compressed-air systems, water-pressure discussions or manufacturer data.
Multiply 0.35 by 100. The result is 35 kPa. Decimal bar values convert cleanly because the factor is simply 100.
12.75 × 100 = 1,275 kPa. You can also express the same pressure as 1.275 MPa.
The relationship comes directly from the definitions of the units. One bar is 100,000 pascals. The prefix “kilo” means one thousand, so one kilopascal is 1,000 pascals. When 100,000 pascals are divided by 1,000 pascals per kilopascal, the result is 100 kilopascals.
The simplicity of the bar-to-kPa relationship is useful when switching between product specifications, engineering documents and pressure gauges. If one source gives 3.2 bar and another uses kPa, you can immediately convert 3.2 bar to 320 kPa without a complex formula.
Bar is a metric pressure unit equal to 100,000 pascals. It is commonly encountered in industrial gauges, compressors, pumps, boilers, hydraulics, vehicle-related pressure specifications and many European technical contexts.
A convenient reference is that 1 bar is close to standard atmospheric pressure, although it is not exactly the same.
The kilopascal is an SI-compatible multiple of the pascal. One kPa equals 1,000 Pa. It is common in engineering calculations, material specifications, building services, pressure ratings and countries where SI units are standard.
Since 100 kPa equals 1 bar, kPa often provides more granular whole-number values for everyday pressure ranges.
Pressure may be shown in bar, kPa or psi depending on the vehicle, tire label, manual or country. If a specification is listed as 2.2 bar, that equals 220 kPa. Always use the manufacturer’s recommended pressure and note whether the specification is gauge pressure or another reference condition.
Compressors, regulators and pneumatic components frequently show maximum or working pressure in bar. Technical documentation may use kPa, MPa or psi. Converting bar to kPa makes it easier to compare ratings and verify that components operate within their specified limits.
Domestic water supply, irrigation, pressure tanks, pumps and filtration systems may report pressure in bar while engineering data uses kPa. For instance, 3 bar equals 300 kPa. Pressure requirements should always be checked against the equipment manufacturer’s instructions.
Hydraulic systems can operate at much higher pressures. A rating of 200 bar equals 20,000 kPa or 20 MPa. For high-pressure systems, MPa may be the more compact unit, but converting to kPa remains straightforward.
Meteorological pressure is usually expressed in hectopascals (hPa), millibars (mbar) or kilopascals rather than bar. Standard atmosphere is 101.325 kPa, which is 1.01325 bar. This illustrates why bar is close to, but not exactly equal to, one atmosphere.
For the reverse conversion, divide kilopascals by 100. You can also move the decimal point two places to the left. For example, 240 kPa becomes 2.4 bar, 85 kPa becomes 0.85 bar, and 1,000 kPa becomes 10 bar.
If reverse conversion is your main task, use our kPa to Bar converter. For other pressure relationships, you may also find the Bar to PSI converter, PSI to kPa converter and MPa to kPa converter useful.
Pressure units come from different measurement systems and practical traditions. Metric engineering often uses Pa, kPa and MPa, while bar remains common for gauges and equipment. Psi is widely used in the United States and in many automotive or industrial contexts. Standard atmosphere is useful as a reference pressure.
| Unit | Equivalent to 1 bar | Typical Context | Relationship to Pascal |
|---|---|---|---|
| bar | 1 bar | Gauges, compressors, pumps | 100,000 Pa |
| kPa | 100 kPa | Engineering, SI-based specifications | 1,000 Pa each |
| MPa | 0.1 MPa | High pressure, materials, hydraulics | 1,000,000 Pa each |
| Pa | 100,000 Pa | Base SI calculations | 1 Pa |
| psi | 14.5038 psi | US customary pressure | ≈ 6,894.757 Pa each |
| atm | ≈ 0.986923 atm | Atmospheric reference pressure | 101,325 Pa each |
The bar-to-kPa factor itself is exact, so conversion accuracy is mainly determined by the precision of the original pressure value. If a gauge reads only to the nearest 0.1 bar, converting 2.3 bar to 230 kPa does not create new measurement precision. It only expresses the same reading in another unit.
For everyday conversions, one or two decimal places may be enough. For engineering work, preserve enough significant figures to match the source data and the required tolerance. When converting to psi or atmospheres, more decimal places may appear because those relationships do not use a simple power-of-ten factor.
Unit conversion and pressure reference are separate issues. Bar and kPa can describe either absolute pressure or gauge pressure. A conversion from 2 bar to 200 kPa changes only the unit; it does not change whether that pressure is absolute or gauge.
Gauge pressure is measured relative to local atmospheric pressure, while absolute pressure is measured relative to a perfect vacuum. In technical work, labels such as bara for absolute bar and barg for gauge bar may be used informally. Always confirm the reference used by the instrument or specification before comparing values.
For safety-critical systems, process equipment and pressure vessels, follow the applicable manufacturer instructions, engineering standards and regulatory requirements rather than relying only on a unit conversion.
Because the factor is 100, the fastest mental conversion is to move the decimal point two places to the right. Thus 1.6 bar becomes 160 kPa, 0.42 bar becomes 42 kPa, and 7.25 bar becomes 725 kPa.
For kPa to bar, do the opposite and move the decimal point two places left: 275 kPa becomes 2.75 bar. This mental shortcut gives the same result as multiplying or dividing by 100.
The same pressure can be expressed with different units: 1 bar, 100 kPa, 100,000 Pa and 0.1 MPa all represent the same pressure magnitude.
Many users look for quick conversions around common pressure ranges. Here are several popular examples:
For any value not shown, use the calculator at the top of this page. The same formula works for very small and very large numbers.
The essential rule is simple: multiply bar by 100 to get kPa. One bar equals exactly 100 kPa, so 0.5 bar equals 50 kPa, 2 bar equals 200 kPa and 10 bar equals 1,000 kPa. To reverse the conversion, divide kPa by 100.
This page provides a fast calculator, reverse converter, multi-unit pressure tool, conversion chart, worked examples and practical context so you can move confidently between bar and kilopascals. For technical or safety-critical decisions, use the converted value together with the correct pressure reference, equipment specifications and applicable standards.
Quick answers to common questions about converting bar and kilopascals.