Pressure Converter
Convert between all 8 pressure units — Pascal, Kilopascal, Bar, Atmosphere, Pound per Square Inch, Torr, Millimeter of Mercury, Inch of Mercury — with instant results, formulas and worked examples.
A single converter for every pressure unit on ConvertWorks. Pick any two units, type a value, and get an instant, accurate result — no page reloads and nothing leaves your browser. Dedicated pages for the most popular pairs are linked below.
Quick reference — Pascals to Kilopascals
Every unit above is defined relative to the pascals: pick any pair and the converter divides the two base factors, so results stay consistent across the whole category.
How to use this calculator
- Choose the unit you have in the From dropdown.
- Choose the unit you want in the To dropdown.
- Type your value — the result updates instantly.
- Use Swap to reverse the conversion, or open a dedicated pair page below for one specific conversion.
The formula
Result = Value × (from-unit factor ÷ to-unit factor), with all factors relative to the pascals.
Worked example
30 psi = 2.06843 bar — in full, 30 Pounds per Square Inch converts to 2.06843 Bar. Tyre pressure, weather maps and diving are the everyday jobs for this conversion.
Frequently Asked Questions
What units does this pressure converter include?
It covers Pascal, Kilopascal, Bar, Atmosphere, Pound per Square Inch, Torr, Millimeter of Mercury, Inch of Mercury — 8 units in total. Every conversion runs through the pascals as the common reference, so any pair you pick stays consistent with every other pair.
How does this pressure converter work?
Each unit is defined by an exact factor relative to the pascals. To convert, the tool multiplies your value by the from-unit's factor and divides by the to-unit's factor, then rounds the display to six significant figures.
How accurate are the results?
The factors come from the official definitions of the units (for example, 1 inch is exactly 0.0254 meters and 1 pound is exactly 0.45359237 kilograms), so conversions are as accurate as the definitions themselves. Display rounding to six significant figures can hide trailing digits on extreme values.
Can I convert Pounds per Square Inch to Bar with this tool?
Yes — select Pounds per Square Inch and Bar in the dropdowns. For example, 30 Pounds per Square Inch equals 2.06843 Bar, and the dedicated pair page linked below focuses on just that conversion.