Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| Pa | Pascal | 100000 |
| kPa | Kilopascal | 100 |
| atm | Atmosphere | 0.98692327 |
| psi | PSI | 14.503768 |
| Torr | Torr / mmHg | 750.06376 |
| inHg | Inch of Mercury | 29.529971 |
Formula: Kilopascal = Bar × 100
Multiply any bar value by 100 to get kilopascal.
Reverse: Bar = Kilopascal × 0.01
Common bar values — factor: 1 bar = 100 kPa
| Bar (bar) | Kilopascal (kPa) | Context |
|---|---|---|
| 0.001 bar | 0.1 kPa | 0.1 kPa |
| 0.01 bar | 1 kPa | 1 kPa |
| 0.1 bar | 10 kPa | 10 kPa |
| 1 bar | 100 kPa | 100 kPa / ~1 atm |
| 1.013 bar | 101.3 kPa | 1 standard atm |
| 2 bar | 200 kPa | 29 psi / car tire |
| 5 bar | 500 kPa | 72 psi |
| 10 bar | 1,000 kPa | 145 psi |
| 100 bar | 1e+04 kPa | 1,450 psi |
| 200 bar | 2e+04 kPa | Scuba tank |
| 300 bar | 3e+04 kPa | High-pressure system |
| 500 bar | 5e+04 kPa | 5,000 psi |
| 1,000 bar | 100,000 kPa | 10,000 psi |
| 0.06895 bar | 6.895 kPa | 1 psi |
| 0.001333 bar | 0.1333 kPa | 1 mmHg |
Bar × 100 = kPa. Exact — 1 bar = 100 kPa by definition.
Move decimal 2 places right: 2.5 bar = 250 kPa.
kPa ÷ 100 = bar.
Monitors dive cylinder pressure in bar — standard in most of the world (200–300 bar).
Reads surface pressure maps in millibar (1 mbar = 0.001 bar) for weather forecasting.
Designs European hydraulic systems — pumps and actuators are rated in bar.
Controls fermentation vessel pressure (1–3 bar) and carbonation pressures in bar.
Specifies pipeline operating pressures and safety relief settings in bar.
Monitors tire pressure and boost pressure on turbocharged engines in bar.
The bar is a metric unit of pressure equal to exactly 100,000 pascals — very close to standard atmospheric pressure (1 atm = 1.01325 bar). It was introduced in 1909 and is widely used in Europe for weather forecasting, diving, and industrial applications.
Scuba diving cylinders are filled to 200–300 bar. Automotive tire pressure gauges often display in bar across Europe. Industrial compressors and hydraulic systems are commonly rated in bar.
Interesting fact: The millibar (mbar = hPa) is the standard unit for atmospheric pressure in meteorology worldwide. Standard sea-level atmospheric pressure is 1013.25 mbar.
The kilopascal (kPa) equals 1,000 pascals and is the practical everyday pressure unit in metric countries. It is the standard unit for tire pressure, blood pressure, and weather maps in countries using SI.
Blood pressure in many countries is expressed in kPa (normal: ~16/10.7 kPa), though mmHg remains dominant in medicine. Car tire pressure is typically 200–250 kPa. Weather maps use hPa (= mbar) for atmospheric pressure.
Interesting fact: The 'bends' (decompression sickness) in scuba diving occurs when dissolved nitrogen forms bubbles as pressure drops — a drop of just a few kPa too quickly can be fatal.
Converting bar to kilopascal is a common task in engineering, medicine, meteorology, and science. Different industries and countries use different pressure units — PSI in the US, bar in Europe, mmHg in medicine, and pascals in physics — making accurate conversion essential for cross-disciplinary work.
Quick reference: 5 bar = 500 kPa and 10 bar = 1000 kPa. For the reverse: 1 kPa = 0.01 bar. The exact factor is 1 bar = 100 kPa.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.