PSI to Bar Calculator - Instant US & Metric Pressure Tool
Fast & accurate PSI to bar converter for US drivers, mechanics, and DIY enthusiasts. Convert tire pressure from pounds per square inch to bar instantly.
US Standard Pressure Converter & CalculatorThe quick answer for 1 PSI — type any value below for the exact result
PSI
Bar
PSI 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
| PSI (psi) | Bar (bar) |
|---|---|
| 1 psi | 0.0689476 bar |
| 5 psi | 0.344738 bar |
| 10 psi | 0.689476 bar |
| 15 psi | 1.034214 bar |
| 20 psi | 1.378952 bar |
| 25 psi | 1.72369 bar |
| 30 psi | 2.068428 bar |
| 32 psi | 2.2063232 bar |
| 35 psi | 2.413166 bar |
| 36 psi | 2.4821136 bar |
| 40 psi | 2.757904 bar |
| 50 psi | 3.44738 bar |
| 60 psi | 4.136856 bar |
| 80 psi | 5.515808 bar |
| 100 psi | 6.89476 bar |
| 120 psi | 8.273712 bar |
| 150 psi | 10.34214 bar |
| 175 psi | 12.06583 bar |
| 200 psi | 13.78952 bar |
Bar to PSI Conversion Table
| Bar (bar) | PSI (psi) |
|---|---|
| 0.5 bar | 7.2518840395 psi |
| 1 bar | 14.5037680789 psi |
| 1.5 bar | 21.7556521184 psi |
| 2 bar | 29.0075361579 psi |
| 2.2 bar | 31.9082897737 psi |
| 2.5 bar | 36.2594201974 psi |
| 3 bar | 43.5113042368 psi |
| 4 bar | 58.0150723158 psi |
| 5 bar | 72.5188403947 psi |
| 6 bar | 87.0226084737 psi |
| 7 bar | 101.5263765526 psi |
| 8 bar | 116.0301446316 psi |
| 10 bar | 145.0376807895 psi |
| 12 bar | 174.0452169474 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 | 33.3586665816 psi | 2.3 bar |
| A road-bike tire | 101.5263765526 psi | 7 bar |
| A garden-hose supply | 43.5113042368 psi | 3 bar |
| An espresso brew pump | 130.5339127105 psi | 9 bar |
| An entry pressure washer | 1450.3768078947 psi | 100 bar |
| A full scuba cylinder | 2900.7536157894 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 pounds per square inch reading from your US gauge — common entries include Ford or Chevy tire pressure (30-36 PSI) or air compressor settings
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2
View Bar Result
The metric value appears instantly. For example, a standard 35 PSI reading converts to about 2.41 bar
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3
Copy or Swap
Copy the metric result or click Swap to convert bar back to PSI
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4
Check Recommended Pressure
Compare your reading to the door jamb sticker. Most US 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 calibrating American gauges to metric specs
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
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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 is designed for American users who need precise pressure conversions. Whether you are inflating tires for a cross-country road trip, adjusting a pressure washer for your driveway in Houston, or working with imported European machinery that requires metric bar settings, this tool gives you instant results. PSI (pounds per square inch) is the standard unit in the United States, while bar is the metric standard globally. Our converter uses the exact factor where 1 PSI equals 0.0689476 bar.
Expert Tips for PSI to Bar Conversion
Memorize key tire pressures for US driving: 30 PSI ≈ 2.07 bar, 32 PSI ≈ 2.21 bar, 35 PSI ≈ 2.41 bar, and 36 PSI ≈ 2.48 bar to cover most sedans and SUVs
Always check tire pressure when cold. In Chicago winters, a 10°F drop can lower pressure by 1 PSI (0.07 bar), triggering your TPMS light
Bicycle tire pressure varies: Road bikes like those in NYC pelotons run 80-130 PSI (5.5-9.0 bar), while mountain bikes for trails in Utah run 25-35 PSI (1.7-2.4 bar)
If your European car manual specifies bar but your US gauge only reads PSI, use a safe default of 2.3-2.5 bar (33-36 PSI) to get to a gas station safely
For scuba divers in Florida, a full standard aluminum tank at 3000 PSI equals about 207 bar. Most dive computers allow toggling between these units