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Pressure Converter
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// about this tool

Pressure Converter Online

Updated 2026-07-09

Convert pressure online for free between pascals, kilopascals, bar, PSI, atmospheres, and mmHg. Enter a value, pick the units, and SnapTools shows the result instantly. Everything runs in your browser, so nothing you enter is uploaded.

Pressure is quoted in a different unit almost everywhere you look — tyres in PSI or bar, weather in hectopascals or mmHg, engineering in kilopascals. This converter moves between them in any direction using standard factors, so you can set your tyre pressure from a manual in the "wrong" unit, read a barometer, or check an equipment spec without doing the arithmetic yourself.

// how to use

  1. 1 Enter a pressure value in the input panel.
  2. 2 Choose the unit you're converting from and the unit you're converting to.
  3. 3 Read the converted value on the right, then copy it.

// examples

Bar to PSI
Input
1 bar → psi
Output
14.503774 psi
PSI to kilopascals
Input
32 psi → kPa
Output
220.632 kPa
Atmospheres to pascals
Input
1 atm → Pa
Output
101325 Pa

// common uses

Converting tyre pressure between PSI, bar, and kPa Weather and barometric pressure readings Engineering and HVAC pressure calculations Reading equipment specs given in another unit

// faq

No. The conversion runs entirely in your browser, so nothing you enter leaves your machine.
Pascals, kilopascals, bar, PSI (pounds per square inch), atmospheres, and mmHg (millimetres of mercury), with conversion in any direction.
About 14.5038 PSI. One bar is also very close to one atmosphere (about 1.013 bar), which is why tyre and weather pressures in bar and PSI look similar.
The pascal (Pa), defined as one newton per square metre. Because a pascal is small, engineering often uses kilopascals or bar, all of which are supported here.
Yes. Converting tyre pressure between PSI, bar, and kilopascals is a very common use, since different gauges and manuals use different units.

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Use this via API

Get a free API key → 
curl -X POST https://snaptools.dev/api/v1/tools/pressure-converter \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"value":"1 bar \u2192 psi"}'
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