Kilopascal to Bar Formula
bar = kPa x 0.01
Conversion factors follow SI relationships published by BIPM and NIST, where those standards apply.
Kilopascal to Bar Converter
Quick Answer
1 kPa = 0.01 bar
Formula: Bar = Kilopascal x 0.01
Quick values
Worked examples
Convert 1 kPa to bar
bar = 1 x 0.01
Result: 1 kPa = 0.01 bar
Convert 10 kPa to bar
bar = 10 x 0.01
Result: 10 kPa = 0.1 bar
Convert 100 kPa to bar
bar = 100 x 0.01
Result: 100 kPa = 1 bar
About Kilopascal and Bar
The bar is defined as exactly 100,000 Pa, so 1 kPa = 0.01 bar and 1 bar = 100 kPa. This is an exact SI-prefix relationship, not an approximate atmosphere conversion.
Category hub: Pressure Conversion · Conversion charts · Conversion formulas
Kilopascal to Bar Conversion Table
| Kilopascal (kPa) | Bar (bar) |
|---|---|
| 1 kPa | 0.01 bar |
| 10 kPa | 0.1 bar |
| 50 kPa | 0.5 bar |
| 100 kPa | 1 bar |
| 101.325 kPa | 1.01325 bar |
| 200 kPa | 2 bar |
| 300 kPa | 3 bar |
| 500 kPa | 5 bar |
| 1000 kPa | 10 bar |
Browse all conversion charts → · Browse conversion formulas →
Practical use cases for Kilopascal to Bar
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.
Kilopascal to Bar FAQs
Common questions about converting kilopascal to bar.
How do you convert kilopascals to bar?
Divide kPa by 100, or multiply by 0.01. Example: 100 kPa = 1 bar, 101.325 kPa = 1.01325 bar (one standard atmosphere), 250 kPa = 2.5 bar.
Is 1 bar the same as 1 atmosphere?
No. 1 bar = 100 kPa exactly. 1 atm = 101.325 kPa = 1.01325 bar. Weather and tire labels that say “about 1 bar” are approximating sea-level air.
Why do European tire gauges use bar instead of kPa?
Bar gives compact numbers (2.2 bar vs 220 kPa) while staying metric. Many ISO shop manuals list both; this page converts them exactly.
Where does the kPa to bar factor come from?
BIPM accepts the bar for use with SI as 10⁵ Pa. NIST SP 811 lists the same factor. No temperature or fluid correction is applied.
Charts and printable PDF
Use the matching kilopascal / bar chart when you need a printable table or offline reference.
Embed this converter
Add this kpa to bar calculator to another site with one async script or a lazy iframe. Keep the Powered by AllUnitConversions attribution so referrals stay canonical.
Docs: /embed?pair=kpa-to-bar · iframe source: /widget