Pressure Converter
Convert between pascals, bars, atmospheres, PSI, torr, mmHg, and more.
Pascal (Pa)
101325
Kilopascal (kPa)
101.325
Megapascal (MPa)
0.101325
Bar (bar)
1.01325
Millibar (mbar)
1013.25
Atmosphere (atm)
1
PSI (psi)
14.6959488
Torr (Torr)
760
mmHg (mmHg)
760
inHg (inHg)
29.9212524
inH₂O (inH₂O)
406.782478
About This Tool
The Pressure Converter converts instantly between 11 pressure units including Pascal, bar, PSI, atm, Torr, mmHg, inHg, and more.
Pressure units are used across engineering, meteorology, medicine, aviation, and diving.
How to Use
- Enter a numeric value in the Value field.
- Select the source unit from the From Unit dropdown.
- Read all equivalent values instantly in the results grid.
- Change the value or unit at any time — results update in real time.
Reference
- 1 atm = 101,325 Pa = 1.01325 bar = 14.696 psi
- 1 bar = 100,000 Pa ≈ 0.987 atm
- 1 psi = 6,894.76 Pa ≈ 0.0680 atm
- 1 torr = 1 mmHg = 133.322 Pa
Use Cases
Engineers convert between PSI and bar. Meteorologists convert atm to hectopascals. Medical professionals measure blood pressure in mmHg.
FAQ
- How many PSI is 1 atmosphere? — 1 atm = 14.696 PSI = 101,325 Pa = 1.01325 bar.
- What is the difference between mmHg and Torr? — mmHg and Torr are nearly identical — both equal 133.322 Pa. Historically, mmHg came from mercury barometers.
- What does PSI stand for? — PSI stands for Pounds per Square Inch. It is commonly used in the US for tire pressure, hydraulics, and other applications.