Converters
Pressure Converter
Convert pascals, bars, atmospheres, psi, and torr.
Free to use — no sign-up or login.
One standard atmosphere is 101325 Pa and displays as 14.6959 psi. One bar is exactly 100000 Pa, so a bar and an atmosphere are close and not equal.
Newtons and pounds-force, without an area, are on the force converter.
Atmospheres, bar, and psi
psi uses 6894.757293168 Pa. Torr in this list is 133.3223684211 Pa, the millimetre of mercury used as a pressure unit.
A bar is not an atmosphere
One bar is 100 kPa. One atmosphere is 101.325 kPa. Swapping them shifts a result by a little over one percent.
Worked example: 1 atmosphere
From atmospheres to psi, 1 atm displays as 14.6959 psi. From bar to pascals, 1 bar is 100000 Pa.
\[ 1\,\mathrm{atm}=101325\,\mathrm{Pa}=14.6959\,\mathrm{psi} \]
Frequently asked questions
What is 1 atm in psi?
14.6959 psi.
Is 1 bar the same as 1 atm?
No. A bar is 100000 Pa and an atmosphere is 101325 Pa.
What is a torr here?
133.3223684211 Pa.
Can I use this for blood pressure?
No. It converts units. It does not interpret a medical reading.
Does it recommend a tire pressure?
No. It only converts the number you enter.
References
Assumptions and limitations
Not a blood-pressure reading and not a tire recommendation. Six significant digits. Gauge versus absolute pressure is not distinguished.