Pressure Converter
Convert between pascal, kilopascal, megapascal, bar, millibar, standard atmosphere, psi, torr, and mmHg. Used in meteorology, engineering, medicine, and automotive work.
Quick Converter
Result
1 bar = 14.5038 psi
psi = bar × 14.503773773020924
About Pressure Units
Pressure is force per unit area. The SI unit is the pascal (1 Pa = 1 N/m²), but many other units are used in specific fields.
Key exact relationships
- 1 pascal = 1 N/m² exactly
- 1 bar = 100,000 Pa exactly
- 1 standard atmosphere = 101,325 Pa exactly
- 1 psi = 6894.757293168... Pa (derived from exact lb and g₀)
- 1 torr = 1/760 atm = 101325/760 Pa exactly
- 1 mmHg (conventional) = 133.322387415 Pa
- 1 inch of mercury (conventional, at 0 °C) = 3386.389 Pa (approximate)
Which unit for which field
- Pascal, kPa, MPa — Scientific work, engineering calculations, material properties.
- Bar, millibar — Meteorology (millibar = hPa), European tire pressure, scuba diving.
- PSI — US tire pressure, hydraulics, HVAC, industrial equipment.
- Atmosphere — Reference for weather and diving; also used in chemistry for standard conditions.
- Torr, mmHg — Vacuum physics, medicine (blood pressure), chemistry.
- InHg — Altimeter settings in US aviation, weather reports in some contexts.