Pressure Converter — Free Online Tool
Convert between pascal, kPa, bar, psi, atm and mmHg in real time.
Result
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About Pressure Converter
The Pressure Converter translates pressure readings between pascals, kilopascals, bar, pounds per square inch (psi), atmospheres, and millimeters of mercury (mmHg). Enter a value and the converted pressure appears instantly with the formula shown, so you can move easily between scientific, automotive, and weather units.
Pressure conversions matter for tire inflation, weather forecasting, scuba diving, HVAC work, and physics problems. All math runs in your browser using precise standard factors, giving you accurate, private results with no waiting and no uploads.
How to Use Pressure Converter
- Type the pressure value you want to convert in the Value field.
- Select the unit you are converting from, like bar or psi.
- Select the unit you want the result in, like kPa or atm.
- Read the result instantly and copy it with one click.
Key Features
Convert between 6 pressure units including psi, bar and atm
Accurate standard factors for scientific use
Live results as you type with the formula displayed
Swap button to reverse the conversion direction
Entirely client-side for privacy and speed
One-click copy of the converted value
Frequently Asked Questions
How many psi are in one bar?
One bar equals about 14.5038 psi. Bar is widely used in Europe for tire and industrial pressure, while psi is common in the United States.
What is standard atmospheric pressure?
Standard atmospheric pressure is defined as 1 atm, which equals 101,325 pascals, about 101.325 kPa, or roughly 14.696 psi at sea level.
How do I convert kPa to psi?
Multiply the number of kilopascals by 0.145038 to get psi. For example, 200 kPa equals about 29.01 psi.
What is mmHg used for?
Millimeters of mercury (mmHg) is commonly used for blood pressure and barometric readings. One atmosphere equals 760 mmHg.