What is the Pressure Converter?
Convert any pressure unit to all others at once — Pa, kPa, bar, psi, atm, mmHg. Pressure conversions are used for tire inflation, weather, scuba diving, hydraulics and medical devices. Every conversion uses the exact internationally defined factor, so results are precise to 12 significant digits.
How to use the Pressure Converter
- Enter your value, your from unit.
- Results update automatically as you type; you can also press Calculate.
- Read the output: pascal (pa), kilopascal (kpa), bar (bar), psi (psi).
- Check the chart to see how the conversion scales.
Formula and method
Worked example
With value = 1, from unit = Pascal (Pa), the Pressure Converter returns pascal (pa): 1 Pa; kilopascal (kpa): 0.001 kPa; bar (bar): 0.00001 bar.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
What does the Pressure Converter do?
Convert any pressure unit to all others at once — Pa, kPa, bar, psi, atm, mmHg.
How is it calculated?
The Pressure Converter uses this method: value in target = value × (factor of source ÷ factor of target).
Can you show an example?
With value = 1, from unit = Pascal (Pa), the Pressure Converter returns pascal (pa): 1 Pa; kilopascal (kpa): 0.001 kPa; bar (bar): 0.00001 bar.
Is the Pressure Converter accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the Pressure Converter is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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