Pressure Converter
Enter one pressure value and instantly see useful equivalents for tires, weather, compressed air, hydraulics, engineering, and science.
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What this converter does
The Pressure Converter changes one entered pressure into several common units at the same time. It supports pascals, kilopascals, megapascals, bar, PSI, standard atmospheres, millimeters of mercury, and torr.
How pressure conversion works
Each unit is converted through a shared base unit: pascals. For example, PSI converts to pascals using the relationship 1 psi ≈ 6,894.757293168 Pa. The result is then converted from pascals into each target unit.
Pressure values may be gauge pressure or absolute pressure depending on the source. This converter only changes the units; it does not know whether your entered value is gauge or absolute.
Worked example
If you enter 35 PSI, the converter shows about 241.3165052609 kPa, 2.4131650526 bar, 2.3816087368 atmospheres, 0.2413165053 MPa, and about 1,809.887 mmHg or torr.
Useful conversion relationships
| Relationship | Value |
|---|---|
| 1 kPa | 1,000 Pa |
| 1 MPa | 1,000,000 Pa |
| 1 bar | 100,000 Pa |
| 1 standard atmosphere | 101,325 Pa |
| 1 psi | about 6,894.757293168 Pa |
| 1 atm | about 14.6959487755 psi |
| 1 atm | 760 torr |
| 1 mmHg | about 133.322387415 Pa |
When pressure conversions are useful
Pressure conversions are useful for tire pressure, weather and atmospheric pressure, compressed air systems, hydraulic equipment, engineering specifications, lab measurements, medical reference values, and comparing products or readings that use different unit systems.
Frequently asked questions
How many pascals are in 1 psi?
One psi is about 6,894.757293168 pascals.
How many pascals are in 1 atmosphere?
One standard atmosphere is exactly 101,325 pascals.
Are mmHg and torr the same?
They are very close. One torr is exactly 1/760 of a standard atmosphere, while one mmHg is commonly treated as about 133.322387415 pascals.
Does this convert gauge pressure or absolute pressure?
This page converts pressure units only. It does not determine whether an entered value is gauge pressure or absolute pressure.