💨 Pressure Converter
Convert between bar, psi, kPa, and atm instantly.
Whether you’re inflating your car tires, checking the weather forecast, planning a scuba dive, or working on an engineering project, accurate pressure conversions matter. Our Pressure Converter makes it simple to switch between bar, PSI, kPa, and atmospheres (atm) — four of the most commonly used pressure units worldwide.
Imagine you’re driving a European car in the US, and the owner’s manual recommends tire pressure of 2.3 bar — but the gas station air pump reads in PSI. Just enter 2.3 in the value field, select bar as “From” and PSI as “To”. The result appears instantly: 2.3 bar = 33.36 PSI. No mental math, no guesswork, and no risk of under- or over-inflating your tires.
Beyond the garage, this converter has plenty of practical uses. Divers check tank pressures and depth equivalents in bar and atm before heading underwater. Weather enthusiasts convert between kPa and atm to read international barometric pressure charts. Engineers and HVAC technicians routinely switch between units when working with equipment sourced from different countries, each using its own standard.
The converter uses fixed conversion factors: 1 bar = 14.5038 PSI, 1 bar = 100 kPa, and 1 atm = 1.01325 bar. These are physical constants, so your results will be consistent with scientific and industrial standards worldwide. Whether you’re a hobbyist or a professional, you can count on the numbers being right.
Frequently Asked Questions
Which pressure units does this converter support?
This tool supports four of the most widely used pressure units: bar (common in Europe and industrial settings), PSI (pounds per square inch, standard in the US), kPa (kilopascals, used in science and weather), and atm (atmospheres, used in diving and physics).
How do I convert PSI to bar for tire pressure?
Select PSI as "From" and bar as "To", then enter the pressure reading from your tire gauge or pump. For example, 32 PSI = 2.21 bar. Most European car manuals specify tire pressure in bar, making this a common use case for travelers and imported vehicle owners.
What's the difference between kPa and bar?
A kilopascal (kPa) is 1/100th of a bar. More precisely, 1 bar = 100 kPa. kPa is commonly used in meteorology for atmospheric pressure readings (standard sea-level pressure is about 101.325 kPa), while bar is more common in engineering and industrial applications.
Why does the result show 4 decimal places?
Pressure conversions often involve non-round conversion factors (e.g., 1 bar = 14.5038 PSI), so 4 decimal places provide useful precision for technical and scientific work. For everyday uses like tire inflation, rounding to 1-2 decimal places is usually sufficient.