Pound-force per square inches to Bars
Convert Pound-force per square inches to Bars instantly. Free online pressure unit converter with exact formula, conversion table and FAQ.
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Formula
bar = psi × 0.0689475729
psi = bar × 14.5037737730
Conversion table
| 1 psi | 0.068948 bar |
| 5 psi | 0.344738 bar |
| 10 psi | 0.689476 bar |
| 20 psi | 1.378951 bar |
| 50 psi | 3.447379 bar |
| 100 psi | 6.894757 bar |
| 500 psi | 34.473786 bar |
| 1000 psi | 68.947573 bar |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is pounds per square inch (psi), a pressure unit widely used in the United States for tires, hydraulics, and plumbing.
What is the destination unit in this conversion?
The destination unit is the bar, a metric pressure unit approximately equal to atmospheric pressure at sea level.
How do I convert psi to bar?
Multiply the psi value by 0.0689475729 to get bar. For example, 30 psi × 0.0689475729 = 2.068427 bar.
Is the psi to bar conversion exact?
Yes. Since 1 psi is defined as exactly 6,894.757293168... pascals and 1 bar equals exactly 100,000 pascals, the factor 0.0689475729 follows directly from those exact definitions.
Where is this conversion commonly used?
It's used for tire pressure, scuba diving equipment, industrial hydraulics, weather barometric readings, and engineering specifications that mix US and metric pressure units.
Can I convert bar back to psi?
Yes. Multiply the bar value by 14.503774 to get psi.
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About this conversion
This page converts pounds per square inch (psi), a pressure unit common in the US for tires and hydraulics, into bar, a metric pressure unit close to normal atmospheric pressure.
This conversion is widely used for checking tire pressure, scuba tank and regulator ratings, hydraulic and pneumatic system specifications, and weather barometric pressure readings.
The formula is bar = psi × 0.0689475729, derived from the exact SI definitions of the pascal-based units psi and bar.
The conversion is exact because both psi and bar are defined in terms of the pascal, the SI-derived unit of pressure, with fixed numeric relationships.
The bar is a legally recognized, though non-SI, metric unit of pressure widely used in Europe, while psi remains the everyday standard in the United States.