Pressure Converter
Convert pressure between bar, psi, pascals, kilopascals, atmospheres, millimetres of mercury and torr. Type a value and see it in every unit at once, exactly. A free pressure converter that runs in your browser.
Set a pressure in the unit a gauge or spec expects. Convert psi to bar for a tyre, kPa to psi for a manual, or read atmospheric pressure in millibars and mmHg, all from one figure. Enter the value once and every unit fills in.
- Exact, standard factors
- 100% free
- No sign-up, no app
- Instant as you type
- Works offline after first load
1 bar in every unit
How to use it
- 1
Enter a pressure
Type the value you have, such as 32 psi or 2.2 bar.
- 2
Set the units
Choose what you are converting from and to, then swap for the reverse.
- 3
Read the rest
See bar, psi, kPa, atmospheres, mmHg and torr together, and copy the one you need.
When it comes in handy
Tyres and pumps
Convert a tyre pressure between psi and bar so you set it correctly at any garage.
Weather and altitude
Switch atmospheric pressure between hectopascals, millibars and inches or millimetres of mercury.
Engineering and science
Convert between pascals, bar and atmospheres for technical work and study.
Instant, exact & 100% in your browser
The conversion runs right here in your browser using exact, standard factors. Nothing you type is sent to a server, there is no sign-up and no limit, and once the page has loaded it keeps working even with no connection.
Frequently asked questions
- How do I convert psi to bar?
- Divide psi by about 14.504 to get bar, since one bar is 14.5038 psi. So a 32 psi tyre is about 2.2 bar. The two are close enough that people sometimes treat 1 bar as roughly 14.5 psi for a quick estimate, but the converter gives the exact figure.
- What is one atmosphere of pressure?
- One standard atmosphere is 101,325 pascals, or about 1.013 bar, or 14.7 psi. It is roughly the air pressure at sea level, which is why it is a useful reference point for everything from weather to scuba diving.
- Are millibars and hectopascals the same?
- Yes, exactly. One millibar equals one hectopascal, which is why weather charts can be labelled either way without any conversion. A typical sea-level reading of about 1,013 mb is the same as 1,013 hPa.
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