Convert Psi to Bar
1 psi equals 0.0689476 bar.
Psi to Bar Converter
What Is a Psi?
Pounds per square inch (psi) is the US standard pressure unit, equal to one pound-force per square inch (≈ 6,894.76 Pa). Used for tire pressure, hydraulics, and HVAC.
What Is a Bar?
The bar equals 100,000 pascals. It is the metric pressure unit used in most countries for tire pressure, weather, and industrial specifications.
Psi to Bar Formula
The conversion formula is:
bar = psi × 0.0689476
This is the reciprocal: 1/14.50377 ≈ 0.0689476.
Worked Example
Convert 35 psi (US car tire pressure):
- Calculate: 35 → 2.413 bar
Common Use Cases
This conversion is needed regularly in:
- Importing US equipment to metric countries: Compressors, pressure gauges, hydraulic tools, and HVAC equipment from the US are rated in psi. Technicians in Europe, Asia, and South America convert to bar for local standards compliance and gauge compatibility.
- Automotive service: American vehicles driven in Europe (or vice versa) have tire pressure specs in psi. European tire gauges read in bar, so a 32 psi specification becomes 2.21 bar — a routine conversion for international auto shops.
- Industrial process control: Multinational manufacturers with plants in the US and abroad need consistent pressure monitoring. A process running at 80 psi in the US plant is reported as 5.52 bar in the European plant's control system.
- Diving equipment servicing: US-manufactured dive regulators and tanks rated in psi must be serviced and tested using bar-rated equipment in most international dive shops. A tank rated at 3,000 psi is 206.8 bar.
Frequently Asked Questions
What is 32 psi in bar?
32 psi equals approximately 2.21 bar (32 ÷ 14.5038). This is a very common tire pressure specification for passenger cars. Other frequent values: 35 psi = 2.41 bar, 40 psi = 2.76 bar, and 44 psi = 3.03 bar.
Is there a simple way to convert psi to bar mentally?
Divide by 15 for a rough estimate (accuracy within 3.4%). For example: 45 psi ÷ 15 = 3 bar (exact: 3.10). For better accuracy, divide by 14.5. Or remember the anchor point: 14.5 psi ≈ 1 bar, then scale proportionally.
What does PSI stand for?
PSI stands for "pounds per square inch" — the force in pounds-force exerted on one square inch of area. One psi = 1 lbf/in² = 6,894.76 pascals. It is part of the imperial/US customary system and remains the dominant pressure unit in American industry, automotive, and HVAC sectors.
Are psig and psia different from psi?
Yes. "psig" means psi gauge (relative to atmospheric pressure), and "psia" means psi absolute (relative to vacuum). When someone says "30 psi," they usually mean 30 psig. To convert: psia = psig + 14.696. So 30 psig = 44.696 psia. When converting to bar, clarify which reference is intended.
Common Psi to Bar Conversions
Psi to bar Conversion Table
Reference table with common psi to bar conversions. All values calculated with high precision.
Psi to Bar Table
0.01 to 50
Psi to Bar Table
100 to 10000000
Bar to Psi Table
0.0001 to 12
Bar to Psi Table
1 to 100000
Looking for the reverse? Convert Bar to Psi
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