Pressure Converter for Pascal, Bar, PSI and More
This pressure converter changes a value between every common pressure unit at once, so you can read Pascal, Bar, PSI, Atmosphere, Torr and more side by side. Type one number, pick its unit, and the full results list updates instantly.
It is built for engineers, scientists, automotive technicians, medical staff, divers, pilots and students — anyone who has to move between metric and imperial pressure units. The converter covers 26 units across eight groups, from SI Pascals to mercury and water columns.
How to Convert Pressure Units
Enter a value
Type a number into the input field. Large numbers are automatically grouped with thousand separators (for example 101 325) so they are easy to read and check.
Select the source unit
Open the unit dropdown and choose what your value is measured in. Start typing a name or symbol such as psi or pascal to search the list quickly.
Read every result
All enabled units update instantly below, grouped by category. Use the Decimals selector to show 2, 4, 6 or 8 places, or pick Auto to let the tool choose.
Copy what you need
Click any row to copy that single value, or use Copy All Results to grab every shown unit at once — ready to paste into a document, spreadsheet or report.
Features
Instant Conversion
Results refresh in real time as you type — no convert button and no waiting, just enter a value and read every unit at once.
Comprehensive Unit Support
Convert across 26 pressure units in eight groups: metric Pascals, Bar, atmospheres, imperial, mercury and water columns, gravity units and Newton-based units.
Smart Input Formatting
Large numbers are grouped with thousand separators automatically, so 101325 reads as 101 325 and is easier to verify at a glance.
Searchable Unit Selection
The source-unit dropdown is searchable. Type a name or symbol like "psi" or "pascal" to jump straight to the unit you need.
Customizable Display
Open Customize Units to toggle each unit on or off by group, so the results list shows only the units relevant to your field.
Precision Control
Pick 2, 4, 6 or 8 decimal places, or Auto. High precision suits scientific work; fewer decimals keep everyday results clean.
One-Click Copy
Copy a single result by clicking its row, or copy every visible value at once with the value and unit symbol included.
Unit Reference Guide
A built-in reference panel explains each unit and where it is typically used, handy for less familiar units like Technical Atmosphere or dyn/cm².
Works Everywhere
The responsive layout works on desktop, tablet and mobile, and remembers your chosen units, precision and source unit between visits.
Frequently Asked Questions
How many PSI are in 1 bar?
One bar equals about 14.5 psi (more exactly 14.5038). Bar is a metric unit where 1 bar is 100 000 Pascals, close to atmospheric pressure at sea level, while PSI is the imperial unit common in the United States. To convert, enter your bar value and read the psi result, or divide PSI by 14.5 for a quick estimate.
What is 1 PSI in Pascals?
One PSI equals 6 894.76 Pascals (6894.757 Pa). The Pascal is the SI unit of pressure — one Newton per square meter — so it is quite small; kilopascals (kPa) and megapascals (MPa) are often used for practical readings. Enter 1 in PSI to see the exact Pa figure at your chosen precision.
How do I convert kPa to PSI?
Pick Kilopascal (kPa) as the source unit, type your value, and read the psi row. As a rule of thumb, 1 kPa is about 0.145 psi, so 100 kPa is roughly 14.5 psi. The converter handles the exact factor for you at any precision.
How do you convert MPa to bar?
One megapascal (MPa) equals 10 bar, because 1 MPa is 1 000 000 Pa and 1 bar is 100 000 Pa. So multiply MPa by 10 to get bar, or just select MPa, enter the value, and read the bar result directly.
Is bar bigger than PSI?
Yes. One bar is about 14.5 times larger than one psi, so the same pressure is a much smaller number when written in bar. For example, a tire at 32 psi is roughly 2.2 bar. Most European gauges show bar, while US gauges show psi.
What is standard atmospheric pressure?
Standard atmospheric pressure at sea level is 1 atm = 101 325 Pa = 1.01325 bar = 14.7 psi = 760 mmHg. The Standard Atmosphere (atm) is used as a reference in diving, aviation and science. Leave the input empty and the converter shows this baseline automatically.
Why is blood pressure measured in mmHg, and how does it relate to Torr?
mmHg (millimeters of mercury) comes from early blood-pressure devices that used mercury columns, so a "120/80 mmHg" reading describes how high the pressure pushes mercury. Torr and mmHg are effectively identical (1 Torr ≈ 1 mmHg); Torr is favored in vacuum work and mmHg in medicine. Both are included as separate units here.
How accurate are the conversions?
Every result is computed from internationally recognized conversion factors relative to the Pascal base unit, so the figures are accurate to many decimal places. Use the Decimals selector to display the precision you need — up to 8 places, with very large or very small results shown in scientific notation.
Are my settings and data private?
Yes. All calculations happen locally in your browser and nothing is sent to a server. Your preferences — which units are shown, the precision, and the source unit — are saved in your browser's local storage on your device. Clear your browser data to reset them.
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