Pressure Converter

Convert between pascals, bar, psi, atmospheres, mmHg, and torr pressure units instantly.

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1. Select the pressure unit you are converting from (Pa, bar, psi, atm, mmHg, or torr). 2. Enter the pressure value in the input field. 3. View all equivalent pressure values across the six supported units displayed below. 4. Use the results for tire pressure checks, weather data, medical readings, or engineering specs. 5. Click the copy icon next to any converted pressure value to copy it to your clipboard. 6. Reference the standard atmosphere equivalents shown to verify your conversions.

About This Tool

The Pressure Converter provides instant conversions between all common pressure measurement units. Whether you need to convert tire pressure from psi to bar, translate weather station readings from millibars to inches of mercury, or work with engineering specifications in different pressure units, this tool delivers accurate results every time.

Our converter supports six major pressure units: pascals (Pa), bar, pounds per square inch (psi), atmospheres (atm), millimeters of mercury (mmHg), and torr. These units are used across diverse fields including meteorology, automotive, HVAC, medicine, diving, and engineering. Simply enter a value in one unit to see all equivalent pressures.

Pressure measurement plays a critical role in many aspects of daily life and industry. Tire pressure directly affects fuel efficiency and safety. Weather forecasts rely on barometric pressure readings. Medical professionals measure blood pressure in mmHg. Engineers specify material tolerances in psi or pascals. Having a reliable converter for these units ensures clear communication and accurate calculations across disciplines.

Formula / How It Works

1 atm = 101,325 Pa = 1.01325 bar = 14.6959 psi = 760 mmHg = 760 torr

Frequently Asked Questions

To convert psi to bar, multiply by 0.0689476. For example, 30 psi equals approximately 2.068 bar. Conversely, to convert bar to psi, multiply by 14.5038. Tire pressure gauges commonly use both units.
Standard atmospheric pressure (at sea level) is defined as 1 atm, which equals 101,325 Pa, 1.01325 bar, 14.6959 psi, 760 mmHg, and 760 torr.
For practical purposes, mmHg and torr are nearly identical. One torr is defined as exactly 1/760 of a standard atmosphere, while 1 mmHg is the pressure exerted by a 1mm column of mercury. The difference is negligible - less than 0.000015%.
Blood pressure is measured in mmHg (millimeters of mercury) because early blood pressure devices (sphygmomanometers) used mercury columns. Despite modern digital devices, the mmHg unit persists by medical convention. Normal blood pressure is about 120/80 mmHg.

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