PSI to Bar Converter
Convert PSI (pounds per square inch) to bar for tire pressure, hydraulic systems, and fluid mechanics. Includes kPa, atm, and MPa conversions.
🚗 Pressure📐 Bar = PSI x 0.0689476
Pressure in PSI
Please enter valid values.
Formula & Reference
| Variable | Formula | Units |
|---|---|---|
| PSI to Bar Converter | Bar = PSI x 0.0689476 | bar |
Step-by-Step Examples
Example 1
Car Tires
32 PSI tire pressure to bar.
- 32 x 0.0689 = 2.206 bar
- European tire gauges use bar; US gauges use PSI
✓ 2.21 bar
Example 2
Bicycle Tires
100 PSI to bar.
- 100 x 0.0689 = 6.895 bar
- Road bike tires: 80-130 PSI (5.5-9 bar)
✓ 6.90 bar
Example 3
Hydraulic System
1,000 PSI to bar.
- 1,000 x 0.0689 = 68.95 bar
- Industrial hydraulics often specify in bar
✓ 68.95 bar
Real-World Applications
Tire Pressure
Check international tire specifications when driving or renting abroad.
Hydraulic Tools
Convert pressure ratings between US PSI and metric bar.
Air Compressors
Match compressor output to international tool requirements.
Engineering
Convert fluid pressure specs between US and metric systems.
Common Mistakes to Avoid
⚠️
Not distinguishing gauge and absolute pressure
PSI gauge (PSIG) measures pressure above atmospheric. PSI absolute (PSIA) includes atmospheric pressure. For tire pressure, PSIG is always used.
⚠️
Forgetting atmosphere reference
Standard atmospheric pressure = 14.696 PSI = 1.01325 bar. A tire at 0 PSI gauge still has 14.7 PSI absolute pressure.
⚠️
Rounding errors in pressure-sensitive systems
In precision hydraulic systems, small pressure errors matter. Use 4+ decimal places for engineering calculations.
Frequently Asked Questions
How many PSI in 1 bar? ▾
14.5038 PSI per bar. Common reference: 2 bar = 29.0 PSI, 3 bar = 43.5 PSI. Car tires are typically 30-35 PSI / 2.1-2.4 bar.
What is standard tire pressure in bar? ▾
Passenger car tires: 2.0-2.5 bar (29-36 PSI). Motorcycle tires: 2.0-3.0 bar front, 2.2-3.3 bar rear. Check your door jamb sticker for your specific vehicle's recommended pressure.
What is the difference between PSI, bar, and kPa? ▾
PSI = US customary; bar = metric (1 bar = 100,000 Pa); kPa = SI unit (1 bar = 100 kPa). The kPa is the SI standard, but bar is widely used industrially.
How do I convert bar to PSI mentally? ▾
Multiply bar by 14.5. Example: 2.2 bar x 14.5 = 31.9 PSI. For reverse: divide PSI by 14.5.
What is 1 atmosphere in PSI? ▾
14.696 PSI = 1 standard atmosphere = 1.01325 bar = 101.325 kPa.