Pressure tools
Pressure Converter
Convert pressure units for weather, tires, plumbing, engineering, laboratory, and industrial measurements.
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Instant results1 pascal [Pa] = 0.001 kilopascal [kPa]
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| Unit | Symbol | Conversion factor | Quick links |
|---|---|---|---|
| pascal | Pa | Base unit | Reference unit |
| kilopascal | kPa | 1 kilopascal [kPa] = 1000 Pa | to Pa from Pa |
| megapascal | MPa | 1 megapascal [MPa] = 1000000 Pa | to Pa from Pa |
| bar | bar | 1 bar [bar] = 100000 Pa | to Pa from Pa |
| millibar | mbar | 1 millibar [mbar] = 100 Pa | to Pa from Pa |
| pound per square inch | psi | 1 pound per square inch [psi] = 6894.757293 Pa | to Pa from Pa |
| kip per square inch | ksi | 1 kip per square inch [ksi] = 6894757.293168 Pa | to Pa from Pa |
| standard atmosphere | atm | 1 standard atmosphere [atm] = 101325 Pa | to Pa from Pa |
| torr | Torr | 1 torr [Torr] = 133.322368 Pa | to Pa from Pa |
| millimeter of mercury | mmHg | 1 millimeter of mercury [mmHg] = 133.322387 Pa | to Pa from Pa |
| inch of mercury | inHg | 1 inch of mercury [inHg] = 3386.388158 Pa | to Pa from Pa |
| meter of water | mH2O | 1 meter of water [mH2O] = 9806.65 Pa | to Pa from Pa |
Accuracy and Sources
Pressure factors use pascal as the reference unit, including standardized values for bar, atmosphere, psi, torr, and water-column units. Content was last reviewed on 2026-05-21. For safety-critical work, confirm results against the relevant official standard.
How pressure conversion works
Pressure conversion changes a measurement from one unit to another using a fixed factor or formula. Use the calculator above for instant results, then check the table and related converter links for common values.
Frequently Asked Questions
View sitemap →What is the base unit for pressure?
The reference base unit used on this page is Pa.
Are these pressure conversions accurate?
Yes, the calculator uses the conversion factors listed on the page. For critical work, verify results with an authoritative standard.