Reference for one unit; displayed values may be rounded.
PSI
Use a dot or comma for decimals, without thousands separators.
Bar
Display rounding does not improve the accuracy of your original measurement. Very large or very small results use scientific notation.
Method and sourcePSI to Bar Conversion Formula
To convert PSI to bar, multiply the PSI value by 0.0689476. One bar is defined as exactly 100,000 pascals, and one PSI equals 6,894.76 pascals.
PSI and Bar Explained
PSI (psi)
PSI (pound-force per square inch) is the imperial pressure unit: one pound of force bearing on one square inch, equal to 6,894.76 pascals. American infrastructure is sized around it — faucets at 40-80 PSI, car tires at 32-36 PSI, shop compressors at 90-175 PSI — which keeps the unit on every US gauge, door sticker, and code document despite the metric world moving on.
Where it is used: PSI rules US plumbing inspections, appliance ratings, tire care, paintball and compressed-air equipment, plus a few legacy industrial markets.
Origin: Born of 19th-century British engineering that paired the pound-force with the square inch, the unit took permanent root in American manufacturing and outlived Britain's own metrication.
Bar (bar)
The bar is a metric unit defined as exactly 100,000 pascals — deliberately close to one atmosphere (1.01325 bar) so gauge readings feel familiar. It is the pressure language of European hardware: tire stickers at 2.3 bar, espresso machines at 9 bar, scuba cylinders at 200 bar, pressure washers at 100-180 bar. Though outside the SI proper, it converts to pascals by a clean factor of 100,000 and is accepted wherever SI units are used.
Where it is used: Bar is the standard gauge unit in Europe and the dive industry — machinery nameplates, compressor dials, tire stickers, and carbonation regulators.
Origin: Coined from the Greek baros (weight) by Norwegian meteorologist Vilhelm Bjerknes around 1909, the bar was later fixed at exactly 100 kPa to align meteorology with engineering practice.
PSI to Bar Conversion Table
Select a value to use it in the calculator.
| PSI (psi) | Bar (bar) |
|---|---|
| 0.0689475729 bar | |
| 0.3447378647 bar | |
| 0.6894757293 bar | |
| 1.034213594 bar | |
| 1.3789514586 bar | |
| 1.7236893233 bar | |
| 2.068427188 bar | |
| 2.2063223338 bar | |
| 2.4131650526 bar | |
| 2.4821126255 bar | |
| 2.7579029173 bar | |
| 3.4473786466 bar | |
| 4.1368543759 bar | |
| 5.5158058345 bar | |
| 6.8947572932 bar | |
| 8.2737087518 bar | |
| 10.3421359398 bar | |
| 12.065825263 bar | |
| 13.7895145863 bar |
Bar to PSI Conversion Table
| Bar (bar) | PSI (psi) |
|---|---|
| 0.5 bar | 7.2518868865 psi |
| 1 bar | 14.503773773 psi |
| 1.5 bar | 21.7556606595 psi |
| 2 bar | 29.007547546 psi |
| 2.2 bar | 31.9083023006 psi |
| 2.5 bar | 36.2594344326 psi |
| 3 bar | 43.5113213191 psi |
| 4 bar | 58.0150950921 psi |
| 5 bar | 72.5188688651 psi |
| 6 bar | 87.0226426381 psi |
| 7 bar | 101.5264164111 psi |
| 8 bar | 116.0301901842 psi |
| 10 bar | 145.0377377302 psi |
| 12 bar | 174.0452852763 psi |
PSI to Bar in Everyday Objects
Common real-world examples that make PSI and Bar easy to picture at a glance.
| PSI (psi) | Bar (bar) | |
|---|---|---|
| A passenger car tire | 33.3586796779 psi | 2.3 bar |
| A road-bike tire | 101.5264164111 psi | 7 bar |
| A garden-hose supply | 43.5113213191 psi | 3 bar |
| An espresso brew pump | 130.5339639572 psi | 9 bar |
| An entry pressure washer | 1450.3773773021 psi | 100 bar |
| A full scuba cylinder | 2900.7547546042 psi | 200 bar |
When You Need PSI to Bar Conversions
Renting a Car in Europe
The rental's door sticker reads 2.3 bar while your inflator speaks PSI — convert to 33.4 PSI and top up with confidence at any Autobahn station.
US Compressor, European Air Tools
European pneumatic tools demand 6.3 bar (91.4 PSI) at the coupling; check your 175 PSI shop compressor regulator and set it by bar for the tool's nameplate.
Pressure Washer Shopping
Consumer washers are rated 100-180 bar in European catalogs but 1450-2600 PSI in American ones — enter the bar figure to compare models across the Atlantic.
Dive Travel Logbooks
A resort fill station stamps 207 bar on your cylinder while your logbook history is in PSI — convert 207 bar to 3,002 PSI to keep the dive record consistent.
Related Pressure Conversions
How to Use
-
1
Enter PSI Value
Type the PSI reading from your gauge — common entries include car tire pressure (30-36 PSI), bicycle tires (80-130 PSI), or compressor settings
-
2
View Bar Result
The equivalent bar value appears instantly. For example, 35 PSI converts to about 2.41 bar
-
3
Copy or Swap
Copy the result or click Swap to convert bar back to PSI
-
4
Check Recommended Pressure
Compare your reading to manufacturer specs. Most passenger cars recommend 32-36 PSI (2.2-2.5 bar)
Why Use Be Converter?
Instant Conversion
Get precise PSI to bar results in real-time as you type — perfect for checking tire pressure readings
High Accuracy
Uses the exact international standard: 1 PSI = 6894.76 Pa and 1 bar = 100,000 Pa, accurate to 6 decimal places
Conversion Table
Quick reference with common automotive and industrial values like 32 PSI (2.21 bar), 36 PSI (2.48 bar), and 100 PSI (6.89 bar)
Bidirectional
Easily swap between PSI and bar with one click for reverse conversions
Free & No Signup
No registration required. Unlimited conversions. Completely free forever
Privacy First
All calculations happen in your browser. No data is sent to any server
Frequently Asked Questions
How many bar is 1 PSI?
What PSI should my car tires be at?
What is the difference between PSI and bar?
How do I convert air compressor pressure from PSI to bar?
Is this tool free to use?
How many bar is 36 PSI?
Is 1 bar exactly 14.5 PSI?
How do I read a European tire gauge in PSI?
About PSI to Bar Converter
Our free online PSI to bar converter provides instant, accurate pressure conversions. Whether you are checking tire pressure on a European rental car with a bar-scale gauge, setting up industrial equipment, calibrating a pressure washer, or reading hydraulic system specifications, this tool gives you precise results. PSI (pounds per square inch) is the dominant pressure unit in the United States and countries using the imperial system, while bar is the standard metric pressure unit used across Europe, Asia, and most of the world. Our converter uses the exact conversion factor where 1 PSI equals 0.0689476 bar.
Expert Tips for PSI to Bar Conversion
For quick tire pressure estimates: 30 PSI ≈ 2.07 bar, 32 PSI ≈ 2.21 bar, 35 PSI ≈ 2.41 bar, 36 PSI ≈ 2.48 bar. Memorize these four and you will cover most passenger car tires
Always check tire pressure when tires are cold (before driving). For every 10°F temperature drop, expect about 1 PSI (0.07 bar) decrease in pressure
Bicycle tire pressure varies widely: road bikes run 80-130 PSI (5.5-9.0 bar), mountain bikes 25-35 PSI (1.7-2.4 bar), and hybrid bikes 50-70 PSI (3.4-4.8 bar)
When renting a car abroad, the recommended tire pressure on the door sticker may be in bar (Europe) or PSI (US). Use 2.3-2.5 bar as a safe default if you cannot find the spec
For scuba diving, a full standard tank at 3000 PSI equals about 207 bar. Most dive computers display both units
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