PSI to Bar Converter – Convert Pressure Units (Free Tool)

PSI to Bar Converter: Convert Pressure Units Instantly (Free Tool)

You have a tire pressure gauge in PSI. The car manual says 2.2 bar. You need to convert.

Or you are working on a European hydraulic system. The pump is rated in bar. Your gauges read in PSI.

PSI and bar are both units of pressure. PSI is common in the United States. Bar is common in Europe and many other countries.

Today, I give you a free PSI to Bar Converter.

You type PSI. The calculator shows bar. It works both ways.

Let me explain what PSI and bar are and why they matter.

What are PSI and Bar? (Simple Explanation)

PSI (Pounds per Square Inch) is the US customary unit of pressure. One PSI is the pressure exerted by one pound of force on one square inch.

Bar is a metric unit of pressure. One bar is approximately equal to atmospheric pressure at sea level.

The relationship:

1 bar = 14.5038 PSI

1 PSI = 0.0689476 bar

Why This PSI to Bar Converter Matters

Here is why you need to convert between PSI and bar.

Reason 1: Tire pressure

US cars show PSI. European cars show bar. Convert to inflate correctly.

Reason 2: Scuba diving

Dive tanks are filled to 200-300 bar (2,900-4,350 PSI). Dive computers and gauges use bar. US divers may think in PSI.

Reason 3: Hydraulic systems

European hydraulic equipment uses bar. US equipment uses PSI. Convert for maintenance.

Reason 4: Air compressors

Compressor ratings: US models use PSI and CFM. European models use bar and L/s. Convert to compare.

Reason 5: Weather and aviation

Bar is common in meteorology and aviation (millibars). Convert to PSI for US weather reports.

The Formula (Very Simple)

PSI to bar:

bar = PSI × 0.0689476

Bar to PSI:

PSI = bar × 14.5038

Example 1: 100 PSI to bar

100 × 0.0689476 = 6.8948 bar

Example 2: 10 bar to PSI

10 × 14.5038 = 145.04 PSI

Example 3: 1 PSI to bar

1 × 0.0689476 = 0.06895 bar

Example 4: 1 bar to PSI

1 × 14.5038 = 14.504 PSI

LIVE PSI to Bar Converter

Type in either box. The other box updates instantly. Watch the pressure meter move.

⚙️ PSI to Bar Converter

Convert pressure units instantly • Works both ways

🔧 PSI (psi)

Pounds per square inch

⇄

⚡ Bar (bar)

1 bar ≈ atmospheric pressure

📊 PRESSURE METER

0 PSI / 0 bar

050 PSI100 PSI150 PSI200 PSI

03.4 bar6.9 bar10.3 bar13.8 bar

Common pressures:30 PSI (2.07 bar)32 PSI (2.21 bar)35 PSI (2.41 bar)100 PSI (6.89 bar)150 PSI (10.34 bar)200 PSI (13.79 bar)

💡 1 bar = 14.5038 PSI. 1 PSI = 0.0689476 bar.

⚡ Car tire pressure: 30-35 PSI (2.07-2.41 bar). Scuba tank: 200-300 bar (2,900-4,350 PSI).

How to Use This PSI to Bar Converter

It could not be simpler.

To convert PSI to bar: Type a number in the PSI box. The Bar box updates instantly.

To convert bar to PSI: Type a number in the Bar box. The PSI box updates instantly.

To swap values: Click the swap button (⇄) between the boxes.

Real Examples: Everyday Pressures

Example 1: Car tire pressure

• Typical US car tire: 32 PSI
• Convert to bar: 32 × 0.0689476 = 2.21 bar

Example 2: Scuba tank

• Scuba tank: 200 bar
• Convert to PSI: 200 × 14.5038 = 2,901 PSI

Example 3: Air compressor

• Compressor: 150 PSI
• Convert to bar: 150 × 0.0689476 = 10.34 bar

Example 4: Atmospheric pressure

• Sea level atmospheric pressure: 14.7 PSI
• Convert to bar: 14.7 × 0.0689476 = 1.013 bar

PSI to Bar Conversion Table

Bar to PSI Conversion Table

Car Tire Pressures

Scuba Diving Pressures

Safety note: Never exceed the tank’s rated working pressure.

Industrial Pressures

Atmospheric Pressure

At sea level:

• 14.6959 PSI
• 1.01325 bar
• 101.325 kPa
• 760 mmHg
• 29.92 inHg

As altitude increases, pressure decreases.

Quick Mental Conversion Tricks

PSI to bar (rough):

Divide by 14.5

Example: 100 ÷ 14.5 = 6.9 bar (actual: 6.89)

Bar to PSI (rough):

Multiply by 14.5

Example: 10 × 14.5 = 145 PSI (actual: 145.04)

The 10 bar = 145 PSI rule:

10 bar is about 145 PSI. Good for order-of-magnitude estimates.

Frequently Asked Questions (FAQs)

1. How many bar is 1 PSI?

0.06895 bar.

2. How many PSI is 1 bar?

14.5038 PSI.

3. What is 32 PSI in bar?

32 × 0.0689476 = 2.206 bar.

4. What is 2.2 bar in PSI?

2.2 × 14.5038 = 31.91 PSI.

5. Why is 14.5 used for rough conversion?

14.5 is close to 14.5038. Good enough for tire pressure.

6. What is the difference between bar and PSI?

Bar is metric. PSI is US customary. 1 bar = 14.5 PSI.

7. What is standard atmospheric pressure in bar?

1.01325 bar.

8. Is bar the same as atmosphere?

No. 1 bar = 0.9869 atm. Very close, but not the same.

9. What is the pressure in a car tire in bar?

2.0-2.5 bar (29-36 PSI).

10. What is a scuba tank pressure in PSI?

2,900-4,350 PSI (200-300 bar).

Common Mistakes

Mistake #1: Using 14.5 instead of 14.5038

For tire pressure, 14.5 is fine. For engineering, use 14.5038.

Mistake #2: Confusing bar with atmosphere

1 bar = 0.9869 atm. The difference is 1.3%.

Mistake #3: Forgetting to convert units in formulas

If a formula expects bar, convert PSI first.

Mistake #4: Assuming 1 bar = 1 kg/cm²

1 bar = 1.0197 kg/cm². Very close, but not exact.

Mistake #5: Rounding too early

Keep several decimal places until the final step.

Bar vs. Millibar

Meteorologists often use millibar (mbar).

1 bar = 1,000 mbar

1,013.25 mbar = 1.01325 bar = 14.7 PSI

Weather map pressures:

• High pressure: 1,020-1,040 mbar
• Low pressure: 980-1,000 mbar

The History of the Bar

The bar was introduced in 1909 by the British Association for the Advancement of Science. It is not an SI unit, but it is accepted for use with SI.

1 bar = 100,000 Pa = 10⁵ Pa

It is convenient because atmospheric pressure is very close to 1 bar.

The History of PSI

PSI (pounds per square inch) originated from the British imperial system. It is widely used in the United States for:

• Tire pressure
• Hydraulic systems
• Pneumatic systems
• Pressure vessels

Final Thoughts

Converting between PSI and bar is essential for international work.

My PSI to Bar Converter gives you:

• Instant conversion both ways
• Visual pressure meter
• Common pressure presets

Bookmark this page. Use it for tire pressure, scuba diving, and industrial systems.

The next time someone asks “How many bar is 30 PSI?”, you will know. 2.07 bar.

Disclaimer: This is an educational tool. For critical pressure applications, use calibrated instruments.

External Links (Authority Backlinks):

1. Wikipedia – Pounds per square inch{:target=”_blank” rel=”noopener noreferrer”}
2. Wikipedia – Bar (unit){:target=”_blank” rel=”noopener noreferrer”}
3. Wikipedia – Pressure{:target=”_blank” rel=”noopener noreferrer”}

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