Convert pressure units: Bar (bar) ↔ Kilopascals (kPa) — 1 Bar = 100 kPa (1 bar = 10⁵ Pascals) for engineering, tire pressure, hydraulic systems, and industrial pressure measurements.
Select conversion direction:
Pressure Conversion Formula (SI Units):
1 Bar (bar) = 100 Kilopascals (kPa) = 10⁵ Pascals (Pa) = 14.5038 psi | 1 kPa = 0.01 bar = 1000 Pa
kPa = bar × 100 | bar = kPa ÷ 100 (Results: 6 decimal places for pressure units)
*SI definition: 1 Pascal = 1 N/m² | Bar: Non-SI but widely used for industrial/automotive pressure
Pressure unit: Used globally for tire pressure, hydraulics, and industrial gas pressure (1 bar ≈ atmospheric pressure at sea level)
Display format:
Quick conversions (common pressure values) - click to auto-fill:
Useful for pressure calculations? Share with engineers, mechanics, HVAC technicians, or anyone needing bar/kPa conversions:
Understanding pressure units for engineering, automotive, hydraulic, and industrial applications.
| Unit | Symbol | Conversion Factor | Common Uses |
|---|---|---|---|
| Bar | bar | 1 bar = 100 kPa = 10⁵ Pa = 14.5038 psi = 0.986923 atm | Tire pressure, hydraulic systems, gas cylinders, meteorology (atmospheric pressure) |
| Kilopascal | kPa | 1 kPa = 0.01 bar = 1000 Pa = 0.145038 psi = 0.009869 atm | Engineering stress, HVAC systems, water pressure, industrial process control |
| Pound per Square Inch | psi | 1 psi = 6.89476 kPa = 0.068948 bar | US automotive (tire pressure), pneumatic systems, oil/gas industry |
| Bar (bar) | ≈ | Kilopascals (kPa) | Practical Application |
|---|---|---|---|
| 1 | ≈ | 100.000000 | Standard bar unit (base pressure reference) |
| 1.01325 | ≈ | 101.325000 | Standard atmospheric pressure (sea level) |
| 2.5 | ≈ | 250.000000 | Typical car tire pressure (cold) |
| 0.1 | ≈ | 10.000000 | Low-pressure hydraulic system (e.g., power steering) |
| 10 | ≈ | 1000.000000 | Industrial compressed air system pressure |
Accurate pressure conversion is critical for safety and performance—here’s how units scale for common use cases:
| Use Case | Primary Unit | bar to kPa Factor | Accuracy Tip |
|---|---|---|---|
| Automotive (Tire Pressure) | bar/psi | ×100 | Round to 1 decimal (e.g., 2.4 bar = 240 kPa) for safe tire inflation |
| Industrial Hydraulics | bar/kPa | ×100 | Use 3 decimals for system pressure calibration (e.g., 15.750 bar = 1575.0 kPa) |
| HVAC Systems | kPa | ÷100 | 1 kPa = 0.01 bar (convert bar readings to kPa for duct pressure measurements) |
| Meteorology (Atmospheric Pressure) | bar/kPa | ×100 | 1 atm = 1.01325 bar = 101.325 kPa (standard for weather measurements) |
About Bar to Kilopascal conversions and pressure measurement standards
The 1:100 bar-to-kPa ratio is a defined SI-derived standard:
Precise factor: 1 bar = 100.000000 kPa (exact for all pressure calculations)
Practical use: 1 decimal place for automotive; 6 decimals for industrial calibration
While both measure atmospheric pressure, they are distinct units with a fixed conversion:
Use these cross-unit conversion factors for full pressure scale compatibility:
1 bar = 100 kPa = 14.5038 psi = 0.986923 atm = 750.062 mmHg (Torr)
1 kPa = 0.01 bar = 0.145038 psi = 0.009869 atm = 7.50062 mmHg
1 psi = 6.89476 kPa = 0.068948 bar | 1 atm = 101.325 kPa = 1.01325 bar
Practical cross-conversion examples:
These conversions are critical for international engineering projects (bar/kPa in EU/Asia vs psi in US) and automotive maintenance (tire pressure across regions).
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