Pressure Converter
Convert between different units of pressure
1 PSI (lb/in²)=0 Bar
Conversion Formula
Step-by-Step Calculation:
To convert 1 PSI to Bar, multiply by 0.068948 to get 0.068948 Bar.
Conversion Table
| PSI (lb/in²) | Bar |
|---|---|
| 0.01 | 0.0007 |
| 0.1 | 0.0069 |
| 1 | 0.0689 |
| 2 | 0.1379 |
| 5 | 0.3447 |
| 10 | 0.6895 |
| 20 | 1.379 |
| 50 | 3.4474 |
| 100 | 6.8948 |
Common Pressure Conversions
Unit Information & History
Pascal
Definition: The SI derived unit of pressure, defined as one newton per square meter.
History: Named after Blaise Pascal, a 17th-century French mathematician and physicist who studied fluids and pressure. It was adopted as an SI unit in 1971.
Current Use: Used in science and engineering. Because it is a very small unit, kilopascals (kPa) are more common for things like tire pressure in metric countries.
PSI (Pound per Square Inch)
Definition: A unit of pressure resulting from a force of one pound-force applied to an area of one square inch.
History: Developed alongside the industrial revolution in Britain and America to measure pressure in steam engines and later hydraulics and pneumatics.
Current Use: Standard unit for tire pressure, blood pressure (informally), and industrial pressure in the US.
Bar
Definition: A metric unit of pressure defined as exactly 100,000 pascals. It is approximately equal to atmospheric pressure at sea level.
History: Introduced by Norwegian meteorologist Vilhelm Bjerknes in 1909. While metric, it is not an official SI unit, but is accepted for use.
Current Use: Commonly used in meteorology (millibars) and measuring pressure in scuba diving tanks and industrial machinery.
Frequently Asked Questions
Quick answers to common questions
Q:How many psi in a bar?
One bar equals 14.5038 pounds per square inch (psi). To convert bar to psi, multiply by 14.5038.
Q:What is 1 bar in pascals?
One bar equals exactly 100,000 pascals (Pa), or 100 kPa. It's a common unit in meteorology and engineering.
Q:What is atmospheric pressure in bar?
Standard atmospheric pressure at sea level is approximately 1.01325 bar, or 101,325 pascals.
Q:How do I convert psi to bar?
Divide the psi value by 14.5038. For example, 30 psi ÷ 14.5038 = 2.07 bar.