Pressure Converter
Convert between Pa, bar, atm, psi, mmHg and more.
Convert between Pa, bar, atm, psi, mmHg and more.
This free Pressure Converter from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the Pressure Converter
- Pick the unit you have and the unit you want.
- Enter the value.
- Read the converted value - most tools update as you type.
- Use the swap button to reverse the direction if needed.
What you can do with the Pressure Converter
- Convert recipe ingredients between metric and imperial.
- Translate engineering specs across systems.
- Check shipping weights and dimensions before ordering.
- Quick travel conversions for distance, speed and currency.
Why use KX Toolkit's Pressure Converter
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
For very large or very small numbers, use the scientific-notation option - it avoids floating-point rounding errors.
Related Unit Converter Tools
If you find this tool useful, explore the full Unit Converter Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.
How do I convert PSI to bar?
Divide PSI by 14.5038 to get bar, or multiply bar by 14.5038 to get PSI. So 30 PSI in a tyre equals about 2.07 bar, and 1 bar equals 14.5 PSI. PSI is common in the US (and UK car culture), while bar is the European standard for tyre pressure, hydraulics, and weather. The converter handles both directions instantly.
What is one atmosphere of pressure?
One standard atmosphere (atm) equals 101,325 Pa, or 1.01325 bar, or 14.696 PSI, or 760 mmHg. It is the average sea-level air pressure on Earth and is used as a reference in many engineering and chemistry contexts. The converter relates atm to all other pressure units, which is handy for diving, weather, and lab work.
What is the difference between Pa, kPa, and MPa?
They are SI multiples. A pascal (Pa) is one newton per square metre, which is tiny. A kilopascal (kPa) is 1,000 Pa and is used for tyre pressures and weather (101 kPa = 1 atm). A megapascal (MPa) is 1,000,000 Pa, common in materials engineering and hydraulics. Just shift the decimal point three places to convert between adjacent prefixes.
How do mmHg and Torr relate?
They are essentially equal: 1 Torr is defined as 1/760 of a standard atmosphere, and 1 mmHg is the pressure of a 1 mm column of mercury at 0 C. The two differ by less than one part in seven million, so for medical and lab use they are interchangeable. Blood pressure readings like 120/80 are quoted in mmHg.
What pressure is normal for car tyres?
Most passenger cars run between 30 and 35 PSI (2.0 to 2.4 bar, or 200 to 240 kPa). The exact value is on a placard inside the driver door. Truck tyres run higher, around 80-110 PSI. The converter helps when reading European or Japanese specifications that use bar or kPa instead of the American PSI.
Does altitude change the pressure reading?
Yes. Atmospheric pressure decreases by roughly 12 percent per 1,000 m of elevation. At Denver (1,600 m) it is about 84 kPa, and on Everest summit it is around 33 kPa. Tyre pressure gauges read the difference between tyre and atmosphere, so the same gauge reading represents slightly different absolute pressures at different altitudes.
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