Convert PSI to Bar
| PSI (psi) | Bar (bar) |
|---|---|
| 1 | 0.068948 |
| 5 | 0.344738 |
| 10 | 0.689476 |
| 14.7 | 1.01353 |
| 50 | 3.44738 |
| 100 | 6.89476 |
| 500 | 34.4738 |
| 1000 | 68.9476 |
How to Convert PSI to Bar
Pressure conversion is important in engineering, meteorology, medicine, and automotive maintenance. Whether you're checking tire pressure, reading a weather barometer, or working with hydraulic systems, converting between PSI and Bar is a practical skill.
Conversion Formula
Pressure is force per unit area. The factor 0.0689476 converts between the specific force/area definitions of psi and bar. The Pascal (1 N/m²) is the SI standard, with other units defined relative to it.
Step-by-Step Examples
undefined = undefined
undefined = undefined
undefined = undefined
History
The Pascal is named after Blaise Pascal, who demonstrated atmospheric pressure with his famous barrel experiment in 1646. The atmosphere unit was formalized to match sea-level pressure. PSI became standard in English-speaking countries through industrial use, while the bar was introduced in 1909 by meteorologist Vilhelm Bjerknes.
Common Use Cases
- Tire pressure (automotive, bicycle)
- Blood pressure measurement (mmHg)
- Weather and barometric pressure
- Scuba diving and altitude calculations
- Industrial hydraulics and pneumatics
Frequently Asked Questions
How do I convert PSI to Bar?
Multiply the value in PSI by 0.0689476. For example, 14.7 psi = 1.01353 bar.
What is standard atmospheric pressure?
Standard atmospheric pressure at sea level is 1 atm = 101,325 Pa = 1.01325 bar = 14.696 psi = 760 mmHg. This is the baseline for many pressure measurements.
What is the difference between PSI and bar?
PSI (pounds per square inch) is used primarily in the US and UK, while bar is the metric standard. 1 bar ≈ 14.504 psi. Tire pressures, for example, may be listed in either unit depending on your country.
What is the formula for PSI to Bar?
bar = psi × 0.0689476. This conversion factor is derived from the precise definitions of each pressure unit.