Pressure Converter
The pascal (Pa) is the base pressure unit here, so every one of the 7 units below, including kilopascals and bar, converts through it. Enter a value, pick your units, and the result updates instantly, all in your browser.
All pressure units
| Unit | Symbol | 1 unit in pascals |
|---|---|---|
| Pascal | Pa | 1 |
| Kilopascal | kPa | 1000 |
| Bar | bar | 100000 |
| Pound per square inch | psi | 6894.76 |
| Atmosphere | atm | 101325 |
| Torr | Torr | 133.32 |
| Millimeter of mercury | mmHg | 133.32 |
Popular pressure converters
The most-searched pressure conversions, each with a full decimal table, the derivation of the factor and its sources.
All pressure conversions
Pressure converters handle pascals, bars, atmospheres, PSI and more. The pascal is the SI base unit, and common engineering units like the bar and the atmosphere are defined as exact multiples of it.
Frequently asked questions
How many PSI are in a bar?
One bar equals about 14.5038 PSI. A bar is defined as exactly 100,000 pascals, close to average atmospheric pressure at sea level.
What is one atmosphere in pascals?
One standard atmosphere is defined as exactly 101,325 pascals, or about 14.696 PSI. It represents typical air pressure at sea level.
Is a bar the same as an atmosphere?
They are very close but not identical. One atmosphere is about 1.01325 bar, so for rough work they are often treated as equal, but precise conversions keep the difference.