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Pressure Converter

Convert between kPa, psi, bar, atm, Torr, and mbar. Input never leaves your device — everything runs locally in your browser.

100% Local Browser Native

How to Use the Pressure Converter

1. Fill the inputs

Enter the pressure with from- and to-units.

2. Read the converted pressure

Check the converted value with formula shown.

3. Swap to verify

Reverse from/to and confirm you land back on the original.

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Frequently Asked Questions

What pressure units are supported?

Kilopascals (kPa), pounds per square inch (psi), bar, atmosphere (atm), Torr (mmHg), and millibar (mbar). All conversions are bidirectional.

When would I use each unit?

kPa: SI standard, meteorology. psi: tire pressure, US hydraulics. bar: industrial, European. atm: chemistry. Torr: vacuum systems. mbar: weather.

What are the conversion factors?

1 atm = 101.325 kPa = 14.696 psi = 1.01325 bar = 760 Torr = 1013.25 mbar. These are exact SI definitions.

Can I convert gauge pressure?

The converter uses absolute pressure by default. For gauge pressure, add atmospheric pressure (101.325 kPa) before converting.

When using Pressure Converter, is the conversion done locally?

Yes. All calculations run in your browser. No data is transmitted.

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Last updated October 2026