Bar to Kilopascal Formula
kPa = bar x 100
Conversion factors follow SI relationships published by BIPM and NIST, where those standards apply.
Bar to Kilopascal Converter
Quick Answer
1 bar = 100 kPa
Formula: Kilopascal = Bar x 100
Quick values
Worked examples
Convert 1 bar to kPa
kPa = 1 x 100
Result: 1 bar = 100 kPa
Convert 10 bar to kPa
kPa = 10 x 100
Result: 10 bar = 1000 kPa
Convert 100 bar to kPa
kPa = 100 x 100
Result: 100 bar = 10000 kPa
About Bar and Kilopascal
Multiply bar by 100 to get kilopascals. 1.01325 bar is one standard atmosphere (101.325 kPa). Hydraulic and process datasheets often switch between these two metric units.
Category hub: Pressure Conversion · Conversion charts · Conversion formulas
Bar to Kilopascal Conversion Table
| Bar (bar) | Kilopascal (kPa) |
|---|---|
| 0.5 bar | 50 kPa |
| 1 bar | 100 kPa |
| 1.01325 bar | 101.325 kPa |
| 2 bar | 200 kPa |
| 2.5 bar | 250 kPa |
| 3 bar | 300 kPa |
| 5 bar | 500 kPa |
| 10 bar | 1000 kPa |
| 20 bar | 2000 kPa |
| 50 bar | 5000 kPa |
Browse all conversion charts → · Browse conversion formulas →
Practical use cases for Bar to Kilopascal
Tire and Vehicle Service
Passenger-car tire placards in the US are often in PSI, while many gauges and shop manuals list kPa or bar. Converting before inflation avoids under- or over-pressurizing a tire.
HVAC and Hydronics
Boiler, chiller, and duct-pressure specs mix PSI, kPa, and inches of water. Field techs convert so setpoints match the equipment nameplate.
Process and Plant Engineering
P&IDs and relief-valve datasheets may use PSI, bar, or kPa depending on the region. Accurate conversion is required before sizing piping and safety devices.
Meteorology and Aviation
Altimeter and station-pressure reports use inHg, hPa, or kPa. Pilots and weather desks convert between those scales for briefings and QNH settings.
Medical and Laboratory Gases
Cylinder pressures and ventilator settings are published in different units by manufacturer and country. Clinicians convert to the unit on the local gauge.
Hydraulics and Pneumatics
Pump and compressor curves are often published in bar or kPa while US shop drawings stay in PSI. Converting keeps actuator force and regulator settings consistent.
Bar to Kilopascal FAQs
Common questions about converting bar to kilopascal.
How do you convert bar to kilopascals?
Multiply bar by 100. Example: 1 bar = 100 kPa, 2.2 bar = 220 kPa, 10 bar = 1,000 kPa. The factor is exact.
What is 2.5 bar in kPa?
2.5 × 100 = 250 kPa. That is a typical passenger-car tire pressure in metric shops (about 36 psi).
Should I use bar or kPa on a P&ID?
Follow the plant standard. Many European P&IDs use bar(g); North American sheets use kPa(g) or psi(g). Convert the number, then keep the gauge/absolute suffix.
Is bar an SI unit?
The pascal is the SI unit. The bar is accepted for use with SI and equals 100 kPa exactly, which is why this conversion has no rounding debate.
Charts and printable PDF
Use the matching bar / kilopascal chart when you need a printable table or offline reference.
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