Pressure Converter
Enter a pressure value and choose a starting unit to convert between PSI, bar, kPa, and atmospheres.
Last updated: September 5, 2026
Frequently asked questions
How many PSI is 2 bar?
2 bar equals about 29 PSI. To convert bar to PSI, multiply by 14.5038 - useful for checking tire pressure specs listed in bar.
What tire pressure unit does my car use?
US vehicles almost always list tire pressure in PSI (on the door jamb sticker); most other countries use bar or kPa. If your car's manual or tire spec is in bar or kPa, convert it to PSI here before checking with a US-standard gauge.
Why are there so many different pressure units?
Different fields settled on different standards historically - PSI is common in the US for tires and mechanical work, bar and kPa are common in metric countries and scientific contexts, and atmospheres (atm) are often used in chemistry - this converter handles the conversion between all of them.
How many kilopascals is 1 atmosphere?
One standard atmosphere equals approximately 101.325 kilopascals. Atmospheres are commonly used as a reference pressure in science and diving, while kilopascals are the standard SI unit used in most engineering and weather contexts.
What is standard atmospheric pressure in PSI?
About 14.7 PSI - 1 atmosphere (atm) equals approximately 14.696 PSI, the reference pressure at sea level.
Why do some tire gauges read 0 at atmospheric pressure instead of 14.7 PSI?
Most tire gauges measure gauge pressure (pressure above the surrounding atmosphere), not absolute pressure - so a gauge reading of 32 PSI actually means about 46.7 PSI absolute. This converter works in gauge pressure terms, matching what your tire gauge and this tool's PSI/bar/kPa readings show.
How many bar is 1 kPa?
0.01 bar - 1 bar equals exactly 100 kPa, so kPa values are simply divided by 100 to get bar.