How to use PSI to Bar
Type a pressure in psi and the value in bar appears straight away. The table below lists common values.
Typical values
A car tyre at 32 psi is about 2.2 bar, and 35 psi is about 2.4 bar. A road bike tyre at 100 psi is roughly 6.9 bar. Standard air pressure at sea level is 14.7 psi, or about 1.01 bar. European pumps and gauges usually show bar, while US ones show psi.
Reading the gauge correctly
Tyre, compressor and pipe gauges read pressure above the surrounding air, sometimes written psig or barg. Scientific and weather data often use absolute pressure, psia or bara, which adds the atmosphere. A tyre at 30 psig is about 44.7 psia. The conversion factor is the same for both.
The formula
bar = psi × 0.0689475729
Examples
- 1 psi to bar
0.06894757 bar
- 10 psi to bar
0.68947573 bar
- 250 psi to bar
17.23689323 bar
psi to Bar conversion table
| psi | Bar |
|---|---|
| 1 | 0.0689 bar |
| 2 | 0.1379 bar |
| 3 | 0.2068 bar |
| 4 | 0.2758 bar |
| 5 | 0.3447 bar |
| 6 | 0.4137 bar |
| 7 | 0.4826 bar |
| 8 | 0.5516 bar |
| 9 | 0.6205 bar |
| 10 | 0.6895 bar |
| 15 | 1.0342 bar |
| 20 | 1.379 bar |
| 25 | 1.7237 bar |
| 30 | 2.0684 bar |
| 40 | 2.7579 bar |
| 50 | 3.4474 bar |
| 75 | 5.1711 bar |
| 100 | 6.8948 bar |
| 250 | 17.2369 bar |
| 500 | 34.4738 bar |
| 1,000 | 68.9476 bar |
Limitations and assumptions
Converts using the exact definitions of both units. Gauge and absolute pressure convert the same way, so keep track of which one your reading is.
Frequently asked questions
How many bar are in one psi?
One psi equals 0.06894757 bar. The formula is bar = psi × 0.0689475729.
How do I convert psi to bar?
Use bar = psi × 0.0689475729. For example, 10 psi gives 0.68947573 bar. Enter your own value above and the converter does the arithmetic for you.
How do I convert bar back to psi?
Use the Bar to PSI converter, or invert the factor by dividing instead of multiplying.
Is this conversion exact?
Pressure units come from different systems: 1 bar = 100,000 Pa, 1 atm = 101,325 Pa and 1 psi is about 6,894.76 Pa.