Pressure Converter
Convert pressure between pascals, bar, atmospheres, PSI, torr/mmHg, inches of mercury, and 6 other units at once. Enter one value, pick its unit, and see the equivalent in every unit.
Input
Output
| Unit | Value |
|---|---|
| No data yet | |
Guides
The Pressure Converter turns a single pressure measurement into its equivalent across 12 units at once. Enter one value, choose the unit it is expressed in, and the tool instantly builds a table showing the same pressure in pascals, bar, atmospheres, PSI, torr/mmHg, and more.
Pressure units are scattered across industries: weather reports use millibars or hectopascals, tire gauges and hydraulics use PSI, scuba diving and industrial gas use bar or atmospheres, and medicine uses mmHg (torr) for blood pressure. This tool bridges all of them at once.
How to use it
- Type the amount you want to convert into the Amount box.
- Pick the unit that amount is in from the Unit list.
- Optionally set the Decimal precision (0 to 10 places) for how the results are rounded.
The results table updates automatically. Use the copy and download buttons to grab every conversion as CSV.
Common pressure references
- Standard atmosphere: 1 atm (101,325 Pa)
- Car tire: about 32 psi
- Bicycle tire: about 100 psi
- Scuba tank: about 200 bar
- Normal blood pressure (systolic): about 120 mmHg
- Deep ocean trench: about 1,086 atm
How many PSI is one atmosphere?
One standard atmosphere equals about 14.696 PSI. This tool computes that conversion (and its inverse) instantly for any value.
What is the difference between torr and mmHg?
They are effectively the same in practice — both describe pressure in terms of how high a column of mercury it would support — though torr is defined as exactly 1/760 of a standard atmosphere while mmHg is defined via the physical density of mercury. The difference between them is smaller than 0.000015%, well below any everyday measurement's precision.
Why are there both "atmosphere" and "technical atmosphere"?
The standard atmosphere (atm) is defined as exactly 101,325 Pa, based on average sea-level air pressure. The technical atmosphere (at), used in some older European engineering contexts, is defined as exactly 1 kgf/cm² (98,066.5 Pa) — a slightly different, gravity-based reference. They're close but not identical.
Privacy
Every conversion runs entirely in your browser. Nothing you enter is sent to a server, logged, or stored.