Convert PSI to Bar Instantly
What this PSI to bar calculator does
This calculator converts pressure values from PSI (pounds per square inch) to bar quickly and accurately. It is useful for mechanics, cyclists, HVAC technicians, engineers, and anyone working with pressure gauges where one device displays psi and another uses bar.
Instead of manually multiplying each time, you can type a value, click calculate, and get a clean conversion result in seconds.
PSI vs bar: quick explanation
What is PSI?
PSI stands for pounds-force per square inch. It is common in the United States for tire pressure, air compressors, and fluid systems.
What is bar?
Bar is a metric pressure unit. One bar is close to average atmospheric pressure at sea level, which makes it convenient for many technical and industrial applications.
Conversion formula
To convert psi to bar, use this formula:
bar = psi × 0.0689475729
Example:
- 100 psi × 0.0689475729 = 6.89475729 bar
- Rounded: 6.895 bar
Common PSI to bar values
| PSI | Bar |
|---|---|
| 10 psi | 0.689 bar |
| 20 psi | 1.379 bar |
| 30 psi | 2.068 bar |
| 40 psi | 2.758 bar |
| 50 psi | 3.447 bar |
| 100 psi | 6.895 bar |
| 150 psi | 10.342 bar |
| 200 psi | 13.790 bar |
| 300 psi | 20.684 bar |
Where this conversion is commonly used
- Car and motorcycle tires: matching recommendations from manuals using different units.
- Bicycle pumps: many pumps and tire sidewalls show both psi and bar.
- Air compressors: shop equipment may mix imperial and metric pressure scales.
- Hydraulic systems: technical documentation often references bar.
- Diving and paintball tanks: pressure checks may require fast unit conversion.
Tips for accurate pressure conversion
- Use the exact factor (0.0689475729) for precise results.
- Round only at the end, based on your application requirements.
- Confirm whether your gauge reads absolute pressure or gauge pressure.
- Double-check units before making safety-related adjustments.
FAQ
How many bar is 1 psi?
1 psi equals 0.0689475729 bar.
How many psi is 1 bar?
1 bar equals approximately 14.5038 psi.
Can I use this for tire pressure conversion?
Yes. This is one of the most common uses of psi-to-bar conversion.
Is this calculator suitable for engineering calculations?
For many practical tasks, yes. For critical engineering systems, follow your project’s required precision and standards.
Final thoughts
A reliable psi to bar calculator saves time and reduces conversion mistakes. Whether you are setting tire pressure, tuning pneumatic tools, or checking technical documentation, a quick and accurate conversion helps you work confidently.