Pressure Converter
Convert psi, bar, atm, Pa.
Input
Result
What is a Pressure Converter?
A Pressure Converter is a free online tool that converts pressure measurements between pascals (Pa), bar, psi (pounds per square inch), atmospheres (atm), and torr. It is useful for engineering, automotive tyre pressure, weather monitoring, and scientific applications.
How to calculate pressure conversion manually (the formula)
Pressure conversion uses fixed conversion factors. To convert psi to bar, divide by 14.5038. To convert bar to psi, multiply by 14.5038. To convert atm to Pa, multiply by 101,325. To convert Pa to atm, divide by 101,325.
Example calculation
Convert 32 psi to bar: 32 ÷ 14.5038 = 2.206 bar. Convert 1.5 bar to psi: 1.5 × 14.5038 = 21.756 psi. Convert 2 atm to Pa: 2 × 101,325 = 202,650 Pa.
Common mistakes
- Confusing bar and psi — One bar is approximately 14.5 psi. Using a 1:1 ratio will produce a severely inaccurate result.
- Using absolute instead of gauge pressure — Tyre pressure is measured in gauge pressure (relative to atmospheric). Absolute pressure includes atmospheric pressure.
- Forgetting the difference between atm and bar — One atm equals 1.01325 bar. They are close but not identical.
Frequently asked questions
What is a Pressure Converter?
A Pressure Converter is a tool that converts pressure measurements between units such as pascals, bar, psi, atmospheres, and torr.
How do I convert psi to bar?
To convert psi to bar, divide the pressure in psi by 14.5038. For example, 30 psi ÷ 14.5038 = 2.068 bar.
What is the formula for converting bar to psi?
To convert bar to psi, multiply the pressure in bar by 14.5038. For example, 2 bar × 14.5038 = 29.0076 psi.
How many pascals are in one atmosphere?
One standard atmosphere (atm) equals 101,325 pascals (Pa).
What is the difference between bar and psi?
Bar is a metric unit equal to 100,000 Pa, while psi (pounds per square inch) is an imperial unit. One bar equals approximately 14.5 psi.