PSI to Bar Calculator
Convert pressure from PSI to bar, kPa and atm.
Results update as you type.
How it works
Pressure is measured in different units around the world, and this calculator converts PSI to the metric units most commonly needed. You enter a pressure in pounds per square inch, and it returns the equivalent in bar, kilopascals, and atmospheres. PSI, common in the United States, is widely used for tire pressure, air compressors, and industrial equipment, while bar and kilopascals are the metric standards used in most other countries and in science and engineering, and atmospheres relate pressure to average sea-level air pressure. The conversions use fixed factors: one PSI equals about 0.069 bar, 6.895 kilopascals, or 0.068 atmospheres. This is useful whenever you encounter a pressure specification in one unit but need another, such as inflating tires to a bar figure from a PSI gauge, reading equipment rated in kPa, setting a European appliance, or working across international technical documents. For quick reference, a car tire around 32 PSI is roughly 2.2 bar or 220 kPa, and standard atmospheric pressure is about 14.7 PSI, 1.013 bar, or 1 atmosphere. Note that pressure gauges usually read gauge pressure, the pressure above atmospheric, while absolute pressure includes atmospheric; this calculator simply converts the numeric value between units regardless of reference. Enter a pressure in PSI to convert it to bar, kilopascals, and atmospheres.
1 PSI = 0.0689476 bar = 6.89476 kPa = 0.068046 atm
Pounds per square inch (PSI) converts to bar by multiplying by 0.0689476, to kilopascals by multiplying by 6.89476, and to atmospheres by multiplying by 0.068046. These are fixed conversion factors between the standard units of pressure, so the same input in PSI is simply scaled by each factor to give the equivalent value in every unit at once.
Source:Unit conversion
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter pressure.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Bar updates instantly as you type — no button to press.
Frequently asked questions
How do I convert PSI to bar?
Multiply the pressure in PSI by 0.0689476 to get bar. For example, 100 PSI is about 6.895 bar. The calculator also converts to kilopascals (multiply PSI by 6.89476) and atmospheres (multiply PSI by 0.068046), giving you the three most common metric and reference pressure units at once.
What is the difference between PSI, bar, and kPa?
PSI (pounds per square inch) is common in the United States, bar is a metric unit roughly equal to atmospheric pressure and widely used in Europe, and kilopascals (kPa) are the SI-based metric unit used in science and many countries. They all measure the same thing, pressure, just in different scales, related by fixed conversion factors.
What is a common tire pressure in bar?
A typical car tire pressure of around 32 PSI is roughly 2.2 bar or 220 kilopascals. Many tire placards and pressure gauges outside the United States use bar or kPa, so converting from a PSI recommendation is common. The calculator makes it easy to set the correct pressure whatever unit your gauge or specification uses.
What is standard atmospheric pressure in these units?
Standard atmospheric pressure at sea level is about 14.7 PSI, which equals 1.013 bar, 101.3 kilopascals, or 1 atmosphere. This is the baseline air pressure, and it is why gauge pressures, which measure above atmospheric, differ from absolute pressures that include it. The calculator converts the numeric value regardless of the reference used.
Does this convert gauge or absolute pressure?
The calculator converts the numeric pressure value between units without assuming a reference, so it works for both gauge and absolute pressure. Just be consistent: if your value is gauge pressure (as most tire and equipment gauges read), the converted result is also gauge pressure. Converting between gauge and absolute requires adding or subtracting atmospheric pressure separately.