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PSI to Bar to kPa Converter

1 Bar = 14.50377 PSI = 100 kPa

Example: Standard passenger car tire pressure of 32 PSI is equivalent to 2.2 Bar or 220 kPa.

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PSI
bar
kPa

Common Pressure Benchmarks

Description PSI Bar kPa
Car Tire (Standard) 32 PSI 2.21 bar 220.6 kPa
Car Tire (High Load) 36 PSI 2.48 bar 248.2 kPa
Bicycle Tire (Road) 90 PSI 6.2 bar 620 kPa
Mountain Bike Tire 28 PSI 1.93 bar 193 kPa
Standard Atmosphere (1 atm) 14.696 PSI 1.013 bar 101.325 kPa
Scuba Tank (Full) 3000 PSI 206.8 bar 20684 kPa
Natural Gas Pipeline 150 PSI 10.3 bar 1034 kPa
Boiler Pressure (Steam) 200 PSI 13.8 bar 1379 kPa

Pressure Units Explained

PSI (pounds per square inch) is the dominant pressure unit in the US for automotive, pneumatic, and hydraulic applications. Bar is the preferred unit in Europe and most industrial applications. kPa (kilopascal) is the SI metric standard used in scientific and international engineering contexts.

1 PSI= 0.06895 bar = 6.895 kPa
1 Bar= 14.5038 PSI = 100 kPa
1 kPa= 0.14504 PSI = 0.01 bar
1 atm= 14.696 PSI = 1.01325 bar

Tire Pressure: PSI vs Bar Reference

Most US tire gauges read in PSI; European gauges read in Bar. Here's a quick reference:

28 PSI≈ 1.93 bar
30 PSI≈ 2.07 bar
32 PSI≈ 2.21 bar
35 PSI≈ 2.41 bar
38 PSI≈ 2.62 bar

Frequently Asked Questions — Pressure Conversion

How do you convert PSI to Bar?
1 PSI = 0.0689476 Bar. Formula: Bar = PSI × 0.0689476. Example: 32 PSI (typical car tire) = 32 × 0.0689476 = 2.21 bar. To go the other way: PSI = Bar ÷ 0.0689476 = Bar × 14.5038.
What is the difference between PSI, Bar, and kPa?
PSI (Pounds per Square Inch) is an imperial pressure unit common in the US. Bar is a metric unit equal to 100 kPa and approximately equal to 1 atmosphere. kPa (kilopascal) is the SI metric unit for pressure. Relationship: 1 bar = 100 kPa = 14.504 PSI. Standard atmosphere = 1.01325 bar = 101.325 kPa = 14.696 PSI.
What is standard car tire pressure in bar?
The typical recommended tire pressure for passenger cars is 30–35 PSI, which equals approximately 2.1–2.4 bar or 207–241 kPa. Always check your vehicle's door jamb sticker (driver's side) for the manufacturer's recommended tire pressure, which varies by vehicle model and load.
What is 1 atmosphere in PSI, Bar, and kPa?
Standard atmospheric pressure (1 atm) = 14.696 PSI = 1.01325 bar = 101.325 kPa. This is the air pressure at sea level used as a reference point for engineering calculations, weather reporting, and scuba diving (depth pressure calculations).
What PSI is recommended for bicycle tires?
Road bike tires: 80–130 PSI (5.5–8.9 bar). Hybrid/touring bikes: 50–70 PSI (3.4–4.8 bar). Mountain bike tires: 25–35 PSI (1.7–2.4 bar). Fat bike tires: 5–15 PSI (0.35–1.0 bar). Higher pressure = less rolling resistance; lower pressure = more traction.

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